HCD-GT22_GT44_GT55 SONY GENEZI.pdf

SERVICE MANUAL

COMPACT DISC DECK RECEIVER

SPECIFICATIONS

HCD-GT22/GT44/GT55

Photo: HCD-GT55

Ver. 1.0 2007.06

Continued on next page

9-887-722-012007F05-1 2007.06

Sony CorporationPersonal Audio DivisionPublished by Sony Techno Create Corporation

E ModelHCD-GT22/GT44/GT55

Australian ModelHCD-GT22/GT44

HCD-GT22 is the amplifier, USB, CD player, tapedeck and tuner section in MHC-GT22.



Model Name Using Similar Mechanism NEWCD CD Mechanism Type CDM74KF-K6BD91UR-WODSection Base Unit Name BU-K6BD91UR-WOD74

Optical Pick-up Block Name KSM-213DCPTAPE Model Name Using Similar Mechanism NEWSection Tape Transport Mechanism Type CWN42FF609

Amplier sectionHCD-GT55The following are measured at AC 120, 127, 220, 240V 50/60HzFront speaker

Power output (rated): 110 W + 110 W (at 6 , 1 kHz, 1% THD)RMS output power (reference): 200 W + 200 W (per channel at 6 , 1 kHz, 10% THD)

SubwooferRMS output power (reference): 190 W(at 6 , 80 Hz, 10% THD)

HCD-GT44The following are measured at AC 120, 127, 220, 240V 50/60HzFront speaker


SubwooferRMS output power (reference): 150 W (at 6 , 80 Hz, 10% THD)

HCD-GT22The following are measured at AC 120, 127, 220, 240V 50/60Hz


InputsAUDIO (phono jack): voltage 250 mV, impedance 47 kilohmsMIC (phone jack): sensitivity 1 mV, impedance 10 kilohms

(USB) port: Type A

OutputsPHONES (stereo mini jack): accepts headphones of 8 or moreSPEAKER: accepts impedance of 6 to 16 SUB WOOFER OUT (HCD-GT55/GT44 only): accepts impedance of 6 to 16

USB sectionSupported bit rate

MP3 (MPEG 1 Audio Layer-3): 32 320 kbps, VBR

Sampling frequenciesMP3 (MPEG 1 Audio Layer-3): 32/44.1/48 kHz

Transfer speedFull-Speed

Supported USB deviceMass Storage Class

Maximum current500 mA

CD player sectionSystem: Compact disc and digital audio systemLaser: Semiconductor laser (=770 810 nm)Emission duration: continuousFrequency response: 20 Hz 20 kHzSignal-to-noise ratio: More than 90 dBDynamic range: More than 88 dB

2HCD-GT22/GT44/GT55

Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C

during repairing. Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times). Be careful not to apply force on the conductor when soldering

or unsoldering.

CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous radiationexposure.

SAFETY-RELATED COMPONENT WARNING!!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.

is classified as a CLASS 1 LASER product. This marking is located on the rear exterior.

This appliance

Tape deck sectionRecording system: 4-track 2-channel, stereoFrequency response: 50 13,000 Hz (3 dB), using Sony TYPE I cassettes

Tuner sectionFM stereo, FM/AM superheterodyne tuner

FM tuner section:Tuning range:

87.5 108.0 MHz (50 kHz step)Antenna: FM lead antennaAntenna terminals: 75 ohms unbalancedIntermediate frequency: 10.7 MHzAM tuner section:Tuning range

Latin American and Oceanian models:530 1,710 kHz (with 10 kHz tuning interval)531 1,710 kHz (with 9 kHz tuning interval)

Other models:530 1,610 kHz (with 10 kHz tuning interval)531 1,602 kHz (with 9 kHz tuning interval)

Antenna: AM loop antenna, external antenna terminalIntermediate frequency: 450 kHz

GeneralPower requirements

Oceanian model: AC 230 240 V, 50/60 HzMexican model: AC 127 V, 60 HzArgentine model: AC 220 V, 50/60 HzOther models: AC 120, 220 or 230 240 V, 50/60 Hz, Adjustable with voltage selector

Power consumptionHCD-GT55: 225 WHCD-GT44: 250 WHCD-GT22: 150 W

Dimensions (w/h/d) (excl. speakers)HCD-GT55:Approx. 280 365 425 mmHCD-GT44/GT22:Approx. 280 325 425 mm

Mass (excl. speakers)HCD-GT55: 10.5 kgHCD-GT44/GT22: 10.0 kg

Design and specifications are subject to change without notice.

3HCD-GT22/GT44/GT55

TABLE OF CONTENTS

1. SERVICING NOTES ............................................... 4

2. GENERAL ................................................................... 6

3. DISASSEMBLY3-1. Disassembly Flow ........................................................... 73-2. Case (Side-L), Case (Side-R) .......................................... 83-3. Case (Top) ....................................................................... 83-4. Lid (CD) .......................................................................... 93-5 CD Mechanism Deck

(CDM74KF-K6BD91UR-WOD), USB board ................ 93-6. Front Panel Block ............................................................ 103-7. Mecha Deck (CWN42FF609) ......................................... 103-8. Back Panel Block ............................................................ 113-9. MAIN Board .................................................................... 113-10. CD Board ......................................................................... 123-11. DRIVER Board, SW Board ............................................. 123-12. Optical Pick-up Block (KSM-213D) ............................... 133-13. SENSOR Board ............................................................... 133-14. MOTOR (TB) Board ....................................................... 143-15. MOTOR (LD) Board ....................................................... 14

4. TEST MODE .............................................................. 15

5. MECHANICAL ADJUSTMENTS ....................... 19

6. ELECTRICAL ADJUSTMENTS ......................... 20

7. DIAGRAMS7-1. Block Diagram CD SERVO, USB Section ............... 237-2. Block Diagram MAIN Section .................................. 247-3. Block Diagram AMP Section .................................... 257-4. Block Diagram PANEL, POWER AMP Section ....... 267-5. Printed Wiring Board CD Board ............................... 287-6. Schematic Diagram CD Board .................................. 297-7. Printed Wiring Boards CHANGER Section .............. 307-8. Schematic Diagram CHANGER Section .................. 317-9. Printed Wiring Board USB Board ............................. 327-10. Schematic Diagram USB Board ................................ 337-11. Printed Wiring Board TC Board ................................ 347-12. Schematic Diagram TC Board .................................. 357-13. Printed Wiring Boards MAIN Section ...................... 377-14. Schematic Diagram MAIN Section (1/4) .................. 387-15. Schematic Diagram MAIN Section (2/4) .................. 397-16. Schematic Diagram MAIN Section (3/4) .................. 407-17. Schematic Diagram MAIN Section (4/4) .................. 417-18. Printed Wiring Board MIC Board ............................. 427-19. Schematic Diagram MIC Board ................................ 437-20. Printed Wiring Board

AMP Board (GT22/GT55) ........................................ 447-21. Schematic Diagram AMP Board (GT22/GT55) ........ 457-22. Printed Wiring Board AMP Board (GT44) ............... 467-23. Schematic Diagram AMP Board (GT44) .................. 47

7-24. Printed Wiring Boards SUB WOOFER Section (GT44/GT55) ..................... 48

7-25. Schematic Diagram SUB WOOFER Section (GT44/GT55) ..................... 49

7-26. Printed Wiring Boards PANEL Section ..................... 507-27. Schematic Diagram PANEL Section ......................... 517-28. Printed Wiring Boards KEY Section ......................... 527-29. Schematic Diagram KEY Section ............................. 537-30. Printed Wiring Board

TRANS Board (GT22/GT55) .................................... 547-31. Schematic Diagram

TRANS Board (GT22/GT55) .................................... 557-32. Printed Wiring Board TRANS Board (GT44) ........... 567-34. Schematic Diagram TRANS Board (GT44) ............. 57

8. EXPLODED VIEWS8-1. Case Section .................................................................... 698-2. KEY TOP Board Section ................................................. 708-3. TC Mecha Deck Section .................................................. 718-4. PANEL Board Section ..................................................... 728-5. Front Panel Section ......................................................... 738-6. MAIN Board Section ....................................................... 748-7. POWER Board, SUB WOOFER Board Section ............. 758-8. Chassis Section ................................................................ 768-9. CD Mechanism Deck Section-1

(CDM74KF-K6BD91UR-WOD) .................................... 778-10. CD Mechanism Deck Section-2

(CDM74KF-K6BD91UR-WOD) .................................... 78

9. ELECTRICAL PARTS LIST ................................ 79

4HCD-GT22/GT44/GT55

MODEL IDENTIFICATION Model Number Label

Model Power voltage indicationGT22: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 150WGT22: E13, AUS AC: 230-240V - 50/60Hz 150WGT22: MX ca-127V 60Hz 150WGT22: AR ca 220V - 50/60Hz 150WGT44: E13, AUS AC: 230-240V - 50/60Hz 250WGT44: E2, E3, E51 AC: 120V/220V/230-240V - 50/60Hz 250WGT44: MX ca-127V 60Hz 250WGT44: AR ca 220V - 50/60Hz 250WGT55: E2, E51 AC: 120V/220V/230-240V - 50/60Hz 225WGT55: MX ca-127V 60Hz 225WGT55: AR ca 220V - 50/60Hz 225W

AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V - 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model

SECTION 1SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.

NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.

UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the lead-free mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARKUnleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher

than ordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 350 C.Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful! Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow)than ordinary solder so use caution not to let solder bridgesoccur such as on IC pins, etc.

Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.

RELEASING THE ANTITHEFT LOCKThe disc table lock function for the antitheft of an demonstrationdisc in the store is equipped.

Releasing Procedure :1. Press the I/1 button to turn the power on.2. Press the CD button to select CD.3. While pressing the x button, press the Z button until

UNLOCKED displayed on the fluorescent indicator tube(around 5 seconds).

Note: When LOCKED is displayed, the antitheft lock is not released byturning power on/off with the I/1 button.

Power VoltageIndication

5HCD-GT22/GT44/GT55

SERVICE POSITIONIn checking the CD mechanism deck, prepare jig (extension cable J-2501-248-A (27 core/300 mm))/J-2501-077-A (13 core/300 mm)

Connect jig (extension cable J-2501-248-A)to the flexible flat cable (27 core) and CD board (CN202).

MAIN board

CD mechanism deck

Connect jig (extension cable J-2501-077-A)to the flexible flat cable (13 core) and DRIVER board (CN701).

HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF

1 Turn the gear (loading A)to the direction of the arrow.

2

6HCD-GT22/GT44/GT55SECTION 2GENERAL

This section is extracted frominstruction manual.

UnitHCD-GT55

HCD-GT44/GT22

* HCD-GT44 only

Remote

1

4/1 (on/standby)Press to turn on the system.

Unit: STANDBY indicatorLights up when the system is off.

2

Remote sensor3

DISPLAYPress to change the information on the display.

Unit: ILLUMINATIONPress to change the illumination pattern around MASTER VOLUME qg.

4

CDPress to select the CD function.

TUNER/BANDPress to select the TUNER function. Press to select FM or AM reception mode.

Unit: TAPE A/BPress to select the TAPE function. Press to select TAPE A or TAPE B.

Unit: AUDIOPress to select the AUDIO function.

USBPress to select the USB function.

Remote: FUNCTIONPress to select the function.

5 (HCD-GT55/GT44 only)SUBWOOFERPress to turn on and off the subwoofer.

SUBWOOFER indicatorLights up when the subwoofer is on.

6

Z PUSHPress to insert or eject a tape.7

ERASEPress to erase MP3 files and folders from the connected optional USB device (Digital music player or USB storage media).

8

Unit: PRESET EQ, GROOVE, SURROUNDRemote: EQPress to select the sound effect.

9

PLAY MODE/TUNING MODE (HCD-GT55 only)Press to select the play mode of a CD, MP3 disc or an optional USB device (Digital music player or USB storage media).Press to select the tuning mode.

EQ BAND (HCD-GT44/GT22 only) Press to select the frequency band.

q;

PHONES jackConnect the headphones.

qa

AUDIO INPUT L/R jacksConnect to an audio component (Portable audio player, etc.).

qs

(USB) port Connect an optional USB device (Digital music player or USB storage media).qd

REC/ERASE indicatorLights up when recording to the connected optional USB device (Digital music player or USB storage media), or when erasing MP3 files or folders.

qf

MIC jackConnect an optional microphone.

MIC LEVELTurn to adjust the microphone volume.

qg

Unit: MASTER VOLUMETurn to adjust the volume.Remote: VOLUME +/Press to adjust the volume.qh

OPERATION DIALTurn to select a track, file or folder.

qj

Unit: NX (play/pause)Remote: N (play)X (pause)Press to start or pause playback.

x (stop)Press to stop playback.

./> (go back/go forward) Press to select a track or file.

Unit: TUNING +/Remote: +/ (tuning)Press to tune in the desired station.

+/ (select folder)Press to select a folder.

m/M (rewind/fast forward) Press to find a point in a track or file.

qk

CD-USB SYNC/REC1Press to record from a disc onto the connected optional USB device (Digital music player or USB storage media).

CD-TAPE SYNCTAPE REC PAUSE/STARTPress to record onto a tape.

ql

Z OPEN/CLOSEPress to insert and eject a disc.

w;

Unit: DISC 1 3Press to select a disc. Press to switch to the CD function from other function.

Unit: DISC SKIP/EX-CHANGE Press to select a disc. Press to exchange a disc while playing.

Remote: DISC SKIPPress to select a disc.

wa

RETURNPress to return to the parent folder.Press to exit search mode.

ws

ENTERPress to enter the settings.

wd (HCD-GT55 only)

ENTERPress to enter the settings.

+/ (equalizer level)Press to adjust the equalizer level.

wf (HCD-GT55 only)BASSPress to select low frequency. The indicator lights up when the button is pressed.

VOCALPress to select mid frequency. The indicator lights up when the button is pressed.

GUITARPress to select high frequency. The indicator lights up when the button is pressed.

FOCUSPress to emphasize equalizer level of the selected band.

wg

CLOCK/TIMER SELECTCLOCK/TIMER SETPress to set the clock and the timers.

wh

REPEAT/FM MODEPress to listen to a disc, an USB device, a single track or file repeatedly.Press to select the FM reception mode (monaural or stereo).

wj

Battery compartment lidwk

CLEARPress to delete a pre-programmed track or file.

wl

TUNER MEMORYPress to preset the radio station.

e;

PLAY MODE/TUNING MODE Press to select the play mode of a CD, MP3 disc or an optional USB device (Digital music player or USB storage media).Press to select the tuning mode.

ea

SLEEPPress to set the Sleep Timer.

Location of Controls

HCD-GT22/GT44/GT55

7

This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SECTION 3DISASSEMBLY

SET

3-2. CASE (SIDE-L), CASE (SIDE-R)(Page 8)

3-3. CASE (TOP)(Page 8)

3-4. LID (CD)(Page 9)

3-9. MAIN BOARD(Page 11)

3-14. MOTOR (TB) BOARD(Page 14)

3-15. MOTOR (LD) BOARD(Page 14)

3-11. DRIVER BOARD, SW BOARD(Page 12)

3-6. FRONT PANEL BLOCK(Page 10)

3-7. MECHANICAL DECK(CWM42FF609)(Page 10)

3-5. CD MECHANISM DECK(CDM74KF-K6BD91UR-WOD)(Page 9)

3-10. CD BOARD(Page 12)

3-12. OPTICAL PICK-UP BLOCK(KSM-213D)(Page 13)

3-13. SENSOR BOARD(Page 13)

3-8. BACK PANEL BLOCK(Page 11)

HCD-GT22/GT44/GT55

8

Note: Follow the disassembly procedure in the numerical order given.

3-2. CASE (SIDE-L), CASE (SIDE-R)

4 three screws(case 3 TP2)

1 three screws(case 3 TP2)

5 two screws(BVTP3 10)


3 case (side-L)

6 case (side-R)

3-3. CASE (TOP)

1 two screws(BVTP3 10)3

2 Open the case (top).



5 case (top)

4 four claws

HCD-GT22/GT44/GT55

9

3-4. LID (CD)

3-5. CD MECHANISM DECK (CDM74KF-K6BD91UR-WOD), USB BOARD

1 Turn the gear (loading A)to the direction of the arrow.

3 four claws

2

4 lid (CD)

7 three screws(BVTP3 8)

6 screw (BVTP3 8)

6 screw(BVTP3 8)

8 CD mechanism deck(CDM74KF-K6BD91UR-WOD)

1 flexible flat (13 core) cable(CN701)

2 flexible flat (27 core) cable(CN302)

4 connector (CN901)

3 flexible flat (21 core) cable(MAIN board: CN301/USB board: CN907)

5 connector (CN903)

9 two screws (M2.6)0 USB board

HCD-GT22/GT44/GT55

10

3-6. FRONT PANEL BLOCK

3-7. MECHA DECK (CWN42FF609)

5 four screws(BVTP3 8)

6 front panel block

1 flexible flat cable (27 core)(CN901)

4 two connectors(CN301, CN302)



1 six screws(BVTP2.6 8)

2

3 mecha deck(CWN42FF609)

HCD-GT22/GT44/GT55

11

3-8. BACK PANEL BLOCK

3-9. MAIN BOARD


4 two screws(BVTP3 10)(GT44/GT55)


5 back panel block

2 connector(CN041)

1 flexible flat cable (9 core) (tuner (FM/AM))3 connector

(CN701)(except Australian model)

5 screw(BVTP3 8)

7 screw(BV3)

9

6 screw(BVTP3 8)

8 two screws(BVTT4 8)

3 connector(CN907)


0 connector(CN031)

4 connector(CN271)

qa MAIN board

qs POWER board

2 connector(CN903)

HCD-GT22/GT44/GT55

12

3-10. CD BOARD

6 CD board

5 Remove soldering from the four points.4 flexible flat (16 core) cable

(CN301)

CD machanism deck(bottom side)

1 screw(BVTP3 8) 2 screw(BVTP2.6)

3 cover (OP)

3-11. DRIVER BOARD, SW BOARD

3 connector(CN703)

4 connector(CN704)

5 DRIVER board

7 SW board

2 wire (flat type) (5 core)(CN702)

1 two screws(BTTP (M2.6))

6 screw(BTTP (M2.6))

CD machanism deck(bottom side)

HCD-GT22/GT44/GT55

13

3-12. OPTICAL PICK-UP BLOCK (KSM-213D)

3-13. SENSOR BOARD

4 two coil springs (insulator)

7 two coil springs (insulator)

5 two insulators

8 two insulators

6 two floating screws(PTPWH M2.6)

2 holder (213) assy

0 Remove the four solders of motor.

qa flexible flat cable (16 core)(CN301)

qs CD board

qd optical pick-up block(KSM-213D)

1 floating screw (PTPWH M2.6)

3 two floating screws(PTPWH M2.6)

9

2 tray

3 belt (table)

5 pulley (table)

8 screw(BTTP (M2.6))

0 SENSOR board

7 gear (geneva)

9 connector(CN731)




HCD-GT22/GT44/GT55

14

3-14. MOTOR (TB) BOARD

3-15. MOTOR (LD) BOARD

6 Remove the two solderings of motor.

8 MOTOR (TB) board

7 table motor assy (M741)


4

3 wire (flat type) (5 core) (CN742)

1 stopper

2 stopper

3 Remove the two solderings of motor.

5 MOTOR (LD) board

1 belt (loading)

4 loading motor assy (M751)


15

HCD-GT22/GT44/GT55

AMP TEST MODEThis mode is used to display the parameter of amplifier IC anddisplay the VACS status.Procedure:

1. Press the I/1 button to turn the power on.2. Press three buttons of x , u and [USB] simultaneously.3. When the AMP test mode is activated, the message AMP

TEST IN is displayed on the fluorescent indicator tubemomentarily, then amplifier adjustment mode is displayed onthe fluorescent indicator tube.

4. Press the [TAPE REC PAUSE/START] button to changed overbetween VACS status display mode and the amplifier ICparameter display mode.

5. In this mode, press the [GROOVE] button to changed overDBFB on/off, and DBFB ON or DBFB OFF is displayedon the fluorescent indicator tube.

6. In this mode, press the [SURROUND] button to changed oversurround on/off, and SURROUND ON or SURROUNDOFF is displayed on the fluorescent indicator tube.

For GT22/GT44 7. In this mode, press the [EQ BAND] button to enter the equalizer

adjustment mode.In the equalizer adjustment mode, press the [EQ BAND] buttonto change over the adjustment band as LOW/MID/HIGH. Andturn the [OPERATION DIAL] knob to adjust the equalizer levelof each bands.

For GT55 7. In this mode, press the [BASS], [VOCAL] or [GUITAR] button

to enter the parametric equalizer adjustment mode.In the parametric equalizer adjustment mode, press the [BASS],[VOCAL] and [GUITAR] button to change over the adjustmentband. And press the [BASS], [VOCAL] or [GUITAR] button tochange over the equalizer frequency of each bands, or pressthe [+] and [--] buttons to adjust the equalizer level of eachbands.

8. To release the amplifier IC parameter display mode or equalizeradjustment mode, press the I/1 button to the power off.

MC TEST MODEThis mode is used to check operations of microprocessor.Procedure:

1. Press the I/1 button to turn the power on.2. Press three buttons of x , u and [AUDIO] simultaneously.3. When the MC test mode is activated, VACS level is displayed

on the fluorescent indicator tube momentarily.4. Press the [TUNING +] button, the message ALL EQ MAX

is displayed on the fluorescent indicator tube momentarilyand press the [TUNING --] button, the message ALL EQ MINis displayed on the fluorescent indicator tube momentarily.

5. Press the [ENTER] button, the message ALL EQ FLAT isdisplayed on the fluorescent indicator tube momentarily.

6. Turn the [VOLUME] knob clockwise, the message VOLUMEMAX is displayed on the fluorescent indicator tubemomentarily and turn the [VOLUME] knob counterclockwise,the message VOLUME MIN is displayed on the fluorescentindicator tube momentarily.

7. Press the [TAPE REC PAUSE/START] button to changed overVACS on/off.

8. Press the I/1 button to release from this mode, then cold resetis performed.

SECTION 4TEST MODE

COLD RESETThe cold reset clears all data including preset data stored in theRAM to initial conditions. Execute this mode when returning theset to the customer.Procedure:

1. Press three buttons of x , u and [GROOVE] simultaneously.2. The message COLD RESET is displayed on the fluorescent

indicator tube momentarily, then becomes standby states.

TUNING STEP CHANGE-OVERA step of AM tuning interval can be changed over between 9 kHzand 10 kHz.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [TUNER/BAND] button to select AM.3. Press the I/1 button to turn the power off.4. Press two buttons of [TUNING +] and I/1 simultaneously.5. The message AM 9K STEP or AM 10K STEP is displayed

on the fluorescent indicator tube, and thus the tuning intervalis changed over.

CD SHIP (LOCK) MODEThis mode moves the optical pick-up to the position durable tovibration. Use this mode when returning the set to the customerafter repair.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press two buttons of u and I/1 simultaneously.4. The message LOCK is displayed on the fluorescent indicator

tube, and the CD ship mode is set.

CD SHIP (LOCK) MODE & COLD RESETThis mode is used to perform CD ship (lock) mode and cold resetsimultaneously.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [ILLUMINATION] and I/1

simultaneously.4. The message COLD RESET is displayed on the fluorescent

indicator tube momentarily, then becomes standby states.

ANTITHEFT LOCK MODEThis mode is used to unable to take sample disc out of disc table inthe shop.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Insert a disc.4. Press two buttons of x and Z for 5 seconds.5. The message LOCKED is displayed on the fluorescent

indicator tube and the disc table is locked. (Even if pressingthe Z button, the message LOCKED is displayed on thefluorescent indicator tube and the disc table is locked)

6. To release this mode, press two buttons of x and Z for 5seconds.

7. The message UNLOCKED is displayed on the fluorescentindicator tube and the disc table is unlocked.

16

HCD-GT22/GT44/GT55

VERSION DISPLAY MODEThis mode is used to check the model, destination and softwareversion.Procedure:

1. Press the I/1 button to turn the power on.2. Press three buttons of x , u and [ILLUMINATION] simulta-

neously.3. When this mode is activated, model type and destination (*1)

are displayed on the fluorescent indicator tube.*1) GRL2H : HCD-GT22

GRL2HS : HCD-GT44GRL3HS : HCD-GT55

Example: GRL3HS_LATIN: Latin American models of HCD-GT554. Press the [TAPE REC PAUSE/START] button to display the soft-

ware version (*2) and year, month, day of the software cre-ation.

*2) G**.*** : The version of system controller (IC901 on the MAINboard).

M**.*** : The version of USB control module in the sysytemcontroller.

U**.*** : The version of USB controller (IC901 on the USBboard).

5. To release this mode, press three buttons of x , u and[ILLUMINATIOM] simultaneously.

CD ERROR CODE DISPLAY MODEThis mode can be used for error code display of CD section.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [CD] and [SURROUND] simulta-

neously.4. When this mode is activated, mechanism deck error code is

displayed on the fluorescent indicator tube.5. Press the [ENTER] button to changed over between optical

pick-up error code display mode and mechanism deck errorcode mode.

Note: There are two [ENTER] buttons on the HCD-GT55, but it works inthe same way whichever button is pressed.

6. Press the [TUNING +]/[TUNING ---] button to change over dis-play of error history number.

7. To release this mode, press the I/1 button to turn the poweroff.

1. Mechanism Deck Error Code ModeWhen this mode is entered, mechanism deck error code is displayedwith the 10-character format on the fluorescent indicator tube.

The first digit from the left indicates:The first digit from the left indicates which mode the error historyis. In the mechanism deck error code mode, M is displayed onthe fluorescent indicator tube.

The second digit from the left indicates:(Error history number display)The second digit from the left indicates which order the error historyis. 0 indicates the latest error history, and each time the numberincreases by one, the error history goes back to one-previous error.

The third and 4th digit from the left indicates:(Error status display)The third and 4th digit from the left indicates which error status isindicated.

Display Status0 0 No error0 8 Table operation time-out (Table does not move to the target

position within the specified time)1 6 In the chucking down operation, the operation was retried

by the maximum number of times but the operation couldnot be completed

1 7 In the chucking up and down operation, the reverserecovery processing was attempted but it could not berecovered

1 8 In the chucking up operation, the operation was retried bythe maximum number of times but the operation could notbe completed

2 0 Loading operation time-out (Table does not move to thetarget position within the specified time)

2 2 As the chuck was in the ex-open status at the initialization,the closing was attempted but could not be completed

The 5th and 6th digit from the left indicates:(Present status display)The 5th and 6th digit from the left indicates which operating statuswhen an error occurred is indicated.

Display Status0 1 Open completion status0 2 From open status, the movement to chucking down position

is under way0 3 From chucking down position, the open operation is under

way0 4 Chucking down completion status1 0 The chucking down operation is under way1 1 The chucking up operation is under way1 2 Close completion status1 3 From close status, the ex-open operation is under way1 4 From ex-open status, the close operation is under way1 8 Ex-pen completion status

The 7th and 8th digit from the left indicates:(Motor status display)The 7th and 8th digit from the left indicates which motor outputstatus when an error occurred is indicated.

Display Status 0 No table motor output 1 Table motor forward output 2 Table motor backward output 3 Table motor break output0 No loading motor output1 Loading motor forward output2 Loading motor backward output3 Loading motor break output

17

HCD-GT22/GT44/GT55

5 REPEAT LIMIT CANCEL MODENumber of repeat for CD playback is 5 times when the repeat modeis REPEAT. This mode is used to enables CD to repeat playbackfor limitless times.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [CD] and u simultaneously.4. The message LIMIT OFF is displayed on the fluorescent

indicator tube momentarily, CD repeat 5 limit is cancelled.

CD/USB POWER MANAGEThis mode is used to changed over CD and USB power on/off fordecreasing of reception noise in the tuner mode.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press the I/1 button to turn the power off.4. Press two buttons of x and I/1 simultaneously.5. The message CD POWER ON or CD POWER OFF is

displayed on the fluorescent indicator tube, and CD and USBpower on/off changed over in the tuner mode.

BOOSTER ON/OFFThis mode is used to changed over MP3 booster on/off.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [USB] button to select USB.3. Press three buttons of x , [SURROUND] and [USB] simulta-

neously.4. The message BOOSTER ON or BOOSTER OFF is

displayed on the fluorescent indicator tube, and MP3 boosteron/off changed over.

EXCITER ON/OFFThis mode is used to changed over the exciter on/off.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Insert a MP3 disc.4. Press three buttons of x ,[SURROUND] and [AUDIO] simul-

taneously.5. The message EXCITER ON or EXCITER OFF is

displayed on the fluorescent indicator tube, and the exciteron/off changed over.

CD SERVICE MODEThis mode can run the CD sled motor freely. Use this mode, forinstance, when cleaning the optical pick-up.Procedure:

1. Press the I/1 button to turn the power on.2. Press the [CD] button to select CD.3. Press three buttons of x , [FOLDER ---] and [SURROUND]

simultaneously, the message SERVICE is displayed on thefluorescent indicator tube.

4. Press the [TUNING ---] button to move the optical pick-up toinside track and the message SLED IN is displayed on thefluorescent indicator tude, or press the [TUNING +] button tooutside track and the message SLED OUT is displayed onthe fluorescent indicator tude.

5. Press the [DISPLAY] button, LD ON or LD OFF is dis-played on the fluorescent indicator tude. Each time [DISPLAY]button is pressed, laser diode on/off is changed over.

6. To release this mode, press three buttons of x , [FOLDER ---]and [SURROUND].

The 9th and 10 th digit from the left indicates:(Tray status display)The 9th and 10th digit from the left indicates which target processingwhen an error occurred is indicated.

Display Status0 1 Open operation1 2 Close operation1 8 Ex-open operation

2. Optical Pick-up Error Code ModeWhen this mode is entered, optical pick-up error code is displayedwith the 8-character format on the fluorescent indicator tube.

The first digit from the left indicates:The first digit from the left indicates which mode the error historyis. In the optical pick-up error code mode, D is displayed on thefluorescent indicator tube.

The second digit from the left indicates:(Error history No. display)The second digit from the left indicates which order the error historyis. 0 indicates the latest error history, and each time the numberincreases by one, the error history goes back to one-previous error.

The third and 4th digit from the left indicates:(Error status display)The third and 4th digit from the left indicates which error status isindicated.

Display Status0 1 Not focused (TOC read without a disc)0 2 GFS NG (TOC read with a disc chucked)0 3 Start operation time-over0 4 Defocused continuously (Defocused during TOC reading)0 5 Q code not entered for specified time0 6 Tracking not turned ON0 7 Blank disc (Blank disc TOC read)

The 5th and 6th digit from the left indicates:(Error step display)The 5th and 6th digit from the left indicates which processing whena trouble occurred

Display Contents0 1 Power OFF in progress0 2 Initialize in progress0 3 Oscillation stopping0 4 From oscillation stop, oscillation starting0 5 Stopping0 6 Stop operation is under way0 7 Start operation in progress0 8 TOC read in progress0 9 Search operation is under way0 A Playback operation is under way0 B Pause operation is under way0 C Playback manual search operation is under way0 D Pause manual search operation is under way0 E

The 7th and 8th digit from the left indicates:The 7th and 8th digit from the left indicates which operation inprogress when a trouble occurred. (Step of each processing of the5th and 6th digits is indicated)

18

HCD-GT22/GT44/GT55

PANEL TEST MODEThis mode is used to check the fluorescent indicator tube, LEDs, phones jack, keys and control knobs.Procedure:

1. Press the I/1 button to turn the power on.2. Press three buttons of x , [SURROUND] and [TUNER] simultaneously.3. All segments on the fluorescent indicator tube and all LEDs light up.4. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key routes check mode.5. In this mode, each time any button is pressed, it displays key route and key number of the button. (Refer to following table)

Example: [DISPLAY] button : KEY 10000[TUNER/BAND] button : KEY 40000[ILLUMINATION] button : KEY 01000[CD-TAPE SYNC] button : KEY 00070

6. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key check mode.7. In this mode, each time any button is pressed, KEYCONT value increases. However, once a button is pressed, it is no longer

taken into account. (Maximum numbers are GT22: 29, GT44: 30, GT55: 39)8. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the phones jack check mode.9. In this mode, H_P ON is displayed when phones jack is inserted, and H_P OFF is displayed when phones jack is pulled out.10. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the volume check mode and display VOLUME

FLAT.11. In this mode, VOLUME UP is displayed when [VOLUME] knob is turned clockwise, and VOLUME DOWN is displayed

when [VOLUME] knob is turned counterclockwise.12. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the jog check mode and display JOG FLAT.13. In this mode, JOG UP is displayed when [OPERATION DIAL] knob is turned clockwise, and JOG DOWN is displayed when

[OPERATION DIAL] knob is turned counterclockwise.14. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to release the Panel Test mode.

Key Key RoutesNo. KEY0 KEY1 KEY2 KEY3 KEY4 (GT55 only)1 DISPLAY ILLUMINATION ENTER DISC 1 +2 POWER ERASE RETURN DISC 2 ENTER(PEQ)3 CD PRESET EQ FOLDER + DISC 3

4 TUNER/BAND GROOVE TUNING +EX-CHANGE/

GUITARDISC SKIP5 TAPE A/B SURROUND PLAY/PAUSE STOP FOCUS (GUITAR)

6 AUDIOEQ BAND (GT22/GT44)

TUNING CD-USB SYNC/REC1 FOCUS (VOCAL)PLAY MODE (GT55)7 USB FOLDER CD-TAPE SYNC VOCAL

8SUBWOOFER

OPEN/CLOSETAPE REC

BASS(GT44/GT55) PAUSE/START9 FOCUS (BASS)

19

HCD-GT22/GT44/GT55SECTION 5

MECHANICAL ADJUSTMENTSPRECAUTION

1. Clean the following parts with a denatured-alcohol-moistenedswab :

record/playback head pinch rollererase head rubber beltscapstan idlers

2. Demagnetize the record/playback head with a headdemagnetizer. (Do not bring the head magnetizer close to theerase head.)

3. Do not use a magnetized screwdriver for the adjustments.4. After the adjustments, appiy suitable locking compound to

the parts adjusted.5. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

TORQUE MEASUREMENTMode Torque Meter Meter Reading

2.6 6.9 mNmFWD CQ-102C (30 70 gcm)

(0.41 0.97 ozinch)

FWD0.15 0.59 mNm

Back TensionCQ-102C (1.5 6.0 gcm)

(0.021 0.083 ozinch)5.4 16.7 mNm

FF/REW CQ-201B 55 170 gcm)0.76 2.35 ozinch)

TAPE TENSION MEASUREMENTMode Tension Meter Meter Reading

FWD CQ-403A more than 100 g(more than 3.53 oz)

20

HCD-GT22/GT44/GT55

3. Mode: Playback

set

test tapeP-4-A063(6.3 kHz, 10 dB) oscilloscope

V H

waveform of oscilloscope

0 +4545 +90 +135 +180good wrong

MIC boardPHONES jack(J803)

2. Turn the adjustment screw and check output peaks. If the peaksdo not match for L-CH and R-CH, turn the adjustment screwso that outputs match within 1dB of peak.

Screwposition

L-CHpeak

within1dB

Outputlevel

L-CHpeak

R-CHpeak

within1dB

Screwposition

R-CHpeak

SECTION 6ELECTRICAL ADJUSTMENTS

0 dB=0.775 VDECK SECTION

set

MIC boardPHONES jack(J803)

+

level meter

test tapeP-4-A063(6.3 kHz, 10 dB)

1. Demagnetize the record/playback head with a headdemagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.3. After the adjustments, apply suitable locking compound to the

parts adjust.

TEST TAPE

RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENTNote: Perform this adjustment for both decks.

Procedure:1. Mode: Playback

Tape Signal Used forP-4-A063 6.3 kHz, -10 dB Azimuth Adjustment

4. After the adjustments, apply suitable locking compound tothe pats adjusted.

Adjustment Location: Playback Head (DECK-A)Record/Playback/Erase Head (DECK-B)

21

HCD-GT22/GT44/GT55

CD SECTION

Note:1. CD Block is basically constructed to operate without adjustment.2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.3. Use an oscilloscope with more than 10 M impedance.4. Clean the object lens by an applicator with neutral detergent when the

signal level is low than specified value with the following checks.5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

Procedure :1. Connect oscilloscope to TP121 (RFI) and TP124 (VC) on the

CD board.2. Press the I/1 button to turn the power ON.3. Set disc (YEDS-18) on the tray and press the u button to

playback.4. Confirm that oscilloscope waveform is as shown in the figure

below. (eye pattern)A good eye pattern means that the diamond shape () in thecenter of the waveform can be clearly distinguished.

Checking Location:

+

CD board

TP121 (RFI)TP124 (VC)

oscilloscope(DC range)

VOLT/DIV: 200 mVTIME/DIV: 500 ns

level:1.2 0.3 Vp-p

TUNER SECTION

FM TUNE LEVEL CHECK

Procedure:1. Turn on the set.2. Input the following signal from signal generator to FM antenna

input directly.

Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz

Deviation : 75 kHzModulation : 1 kHzANT input : 35 dBu (EMF)

Note: Use 75 ohm coaxial cable to connect signal generator and the set.You cannot use video cable for checking.Use signal generator whose output impedance is 75 ohm.

3. Set to FM tuner function and tune A, B and C signals.4. Confirm TUNED is lit on the display for A, B and C signals.

When the selected station signal is received in good condition,TUNED is displayed.

signal generator

set

TP124(VC)

CD Board (Conductor Side)

TP121(RFI)

IC101

22

HCD-GT22/GT44/GT55

MEMO

HCD-GT22/GT44/GT55

2323HCD-GT22/GT44/GT55

SECTION 7DIAGRAMS

7-1. BLOCK DIAGRAM CD SERVO, USB Section

SYSTEM CONTROLLERIC901 (1/4)

CD-MP3 PROCESSORIC101

MUTE

2-AXISDEVICE

(TRA

CKIN

G)(F

OCUS

)

95

89

A

BD+3.3VDETECTOR

FNi1 (A)

RFo97 FPi1 (B)

88

2

AGCi

3RFRP RFZi

76TEi TEZi

83RFEQo 81 RFi82 RFRPi

30LO

27RO

65AIN (PI4)66BCKi (PI5)

BCKA-IN

BUS1-U

BUS0-U

BUS2-U

BUS3-U

BUCK-U

67LRCKi (PI6)LRCK

51PIO3GATE

46AoUT3 (PO4)ST-REQ

38BUS0

R-CH94 FNi2 (C)

96 FPi2 (D)

100 TNi (E)

98 TPi (F)

91 LDo 92MDi

2 VO1+

1 VO1

13 DMo

LDPD

LASER DIODE

OPTICAL PICK-UPBLOCK

(KSM-213DCP)

B

C

D

E

F

12 FMo

10 TRo

9 FOo

20 IO0 (/HSO)

I-V A

MP

M401(SPINDLE)

M402(SLED)

12 VO2

11 VO2+

18 VO3+

17 VO3

26 VO4+

27

7

IN4 24

IN3 20

IN2 9

IN1 3

BIAS 23

84 VRo

VO4

M

M

FOCUS/TRACKING COIL DRIVE,SLED/SPINDLE MOTOR DRIVE

IC401

S201(LIMIT)

BD+3.3V

24 XO

23 XI

X10216.9344MHz

7 CD-M-MUTE

ACD-L

: CD PLAY

SIGNAL PATHR-ch is omitted due to same as L-ch.

: USB

VCC

A

B

C

D

E

F

LD

PD

SP+

VC

SP

SL+

SL

T+

T

F+

F

47AOUT2 (PO5)63BCK (PO8)

CLKDATA

1 2 17 CD-BUS0 (I/O)13

39BUS1 3 4 16 CD-BUS1 (I/O)5

40BUS2 (SO) 9 8 15 CD-BUS2 (I/O)

12 CD-BUCK

641BUS3 (SI) 11 10 14 CD-BUS3 (I/O)

19 CD-SEL112

BUS SWITCHIC301

1 213

3 45

9 86

11 1012

BUS SWITCHIC302

DATA SELECTORIC303

SELECT

42BUCK (CLK) 42

3

CCE-U13 CD-CCE

43XCCE

54SBSY

48PIO0

7

18 MP3 IREQ

21 CD-SEL2

29 I-SBSY37XRST 6 CD XRST

5

REQ-U

6

1214

13

910

11

1

CLKDATA

LB

I/O0

I/O

15

D0

D15

S-RAMIC921

39UB40

OE41WE17

CE6

79D+

80D

77USBOC

USB CONTROLLERIC901 CN803

(USB)

3

2

1

D+

D

78USBPON

70CS264RD65WR66SRLLB67SRLUB

VBUS

VBUS POWERON/OFF SWITCH

IC915

5

1

4 OUT

EN3

FLG

INVBUS+5V

93 DATA92 BCK

85 DATA86 CLOCK

71 LRCK94 GATE97 ST-REQ

55 BUS056 BUS1

88 RXD187 TXD1

2 DI84 DO1 /RESET

57 BUS258 BUS359 /BUCK60 /CCE96 REQ

7

10, 1

3

16,

29

32,

35

38

18

25,

28

35

A0

A15

A1

A16

44

42,

27

24

,21

1

8, 5

1

37

43,

46

54

73 X2

75 X1

X9019MHz

AUTOMATICPOWER

CONTROLQ301

BCKA-IN

LRCKGATEST-REQ

BUS1-UBUS0-U

BUS2-UBUS3-UBUCK-UCCE-UREQ-U

43O-USB-TXD (SO)42I-USB-RXD (SI)

10O-USB-RST (DO)9I-USB-CTS (DI)11O-USB-RESET

LOADING MOTOR DRIVEIC701

FINRIN

O-LM-F

S751

LEVEL SHIFTQ731

DISC TABLEADDRESS SENSOR

IC731

23 OUT1 4OUT2 2

79O-LM-R 22

M M751(LOADING)

TABLE MOTOR DRIVEIC712

FINRIN

O-TM-F 25 OUT1 4OUT2 2

79O-TM-R 24

I-CD-SENS 26

I-ENCD 55

I-OPEN-SW 27

M M741(TABLE)

ROTARYENCODER

S711

DISC TABLEADDRESS DETECT

OPEN

CLOSE

DISC TABLEOPEN/CLOSE

DETECT

RECD801

(USB)

O-USB-LED 37 LED DRIVEQ931

(Page 24)

HCD-GT22/GT44/GT55


7-2. BLOCK DIAGRAM MAIN Section

R-CH

HP INB

CD-LA

T001BIAS OSC

MUTINGQ305

HRPE1(REC/PB/ERASE)

(DECK-B)

HP1(PB)

(DECK-A)

L-CH

R-CHR-CH

L-CH

R-CHR-CH

R-CH

R-CH

MUTINGQ307

MUTING CONTROLSWITCH

Q305, 306

MUTINGQ401, 403

R-CHMUTING

CONTROL SWITCHQ407

REC CONTROLSWITCH

Q409, 410

R-CH

REC AMPIC401

PB AMPIC301

ERASE

BIAS OSCQ453

REC SWITCHQ405

PB SWITCH(DECK-B)

Q303

REC BIASSWITCH

Q454, 455

AUDIO+9V

R-CH

PB SWITCH(DECK-A)

Q301

R-CH

+

DECK-A/BSELECT SWITCH,

REC/PB SELECT SWITCH

Q408

TUNER (FM/AM)

AM

FM ANT

AM ANT

TUNER-L

TUNER-R

PLL DO

R-CH

PLL DIPLL CLK

PLL CE

FM75(COAXIAL)

ANTENNA

AUDIOJ802

31 I-LV23004T-DI

TUNED 34 I-TUNED

39 TAPE-L

1 TUNER-L

2

5

LIN

DATA

6

CLK

16

DATA

15

CLK

2

10

AUX-L

37 MIX2

11 VOL IN-LTONE OUT-L 14OUT-L

9LOUT

40 CD-L

O-BI

AS

33 O-LV23004T-DO32 O-LV23004T-CLK28 O-LC72121-CE

49

O-RE

C/PB

46

O-RE

C-M

UTE

48

O-F-

DATA

41

4

SAOU

TI-S

TREA

M

67

O-AU

DIO-

CLK

45

O-P-

DATA

44

I-HP/

MIC

58

12BB12

13BB22

DSW OUT

COUT

EBASS AGC3REC OUT-L

I-VAC

S

I-TAPE-STAT

59

D213 D211

BAND-PASSFILTER

Q111, 112

+4.1VREGULATOR

Q701

+R-CH

R-CH

M+9V

BASS AGCQ113

BUFFERQ702

D031

3

PARAMETRIC EQUALIZERIC102

(GT55)

(GT22/GT44)

INPUT SELECTOR, TONE CONTROL,ELECTRICAL VOLUME

IC103

CAMP+ M

TAPE MECHANISMDECK BLOCK

A-HALF

B-SOL

B-HALF

A-PHOTOB-PHOTOB-REC-F

CAPSTAN/REELMOTOR DRIVE

Q911, 914

TRIGGER PLUNGERDRIVE (DECK-B)

Q912, 915

60

O-B-SOL 87

A-SOLTRIGGER PLUNGERDRIVE (DECK-A)

Q913, 916O-A-SOL 88

O-MOTOR 85

I-RELL-A 78I-RELL-B 79SYSTEM CONTROLLER

IC901 (2/4)

: TUNER (FM/AM)

: CD PLAY


: TAPE PLAY (DECK-A)

: TAPE PLAY (DECK-B)

: MIC

: TAPE REC

: AUDIO IN

(GT44/GT55)

(GT22: E2, E3, E13, E51, MX, AR/GT44: E2, E3, E13, E51, MX, AR/GT55)

AUDIO+9V

J801MIC

RV801MIC LEVEL

MUTINGQ801

MIC AMPIC801 (1/2)

MIC AMPIC801 (2/2)

4

L+R SIGNAL

D-LIGHT B+

D-LIGHTSYNC OUT

J701

AbbreviationAR : Argentina modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V - 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model

(Page 23)

(Page 25)

(Page 25)

(Page 25)

(Page 25)

HCD-GT22/GT44/GT55


7-3. BLOCK DIAGRAM AMP Section

OUT BUFFERIC251C

BASS AGCE

SW OUTD

POWER AMP

MUTINGQ251

OVER LOADDETECT

Q441

OVER LOADDETECT

Q501

R-CH

MUTINGQ272

BUFFERQ121

LINE AMPIC252

STANDBY SWITCHQ489

DC DETECTQ481, 482

IC441 (GT22/GT55)IC441 (GT44)

+

+

TEMPERATUREDETECT

Q483, 484

TEMPERATUREDETECT

Q503, 507

R-CH

R-CH

R-CH

TH441

+

++

POWER AMPIC501

MUTINGCONTROL SWITCH

Q261

O-SY

S-M

UTE

1

O-ST

K-M

UTE

36

O-SW

R

2

+ R-CH

PROTECTORQ485

RELAY DRIVEQ486, 488 (GT22)

Q480, 486, 488 (GT44/GT55)

+PROTECTDETECT

Q487

FAN MOTORDRIVE

Q043 045

FAN MOTORDETECT

Q046

RY441

BHP IN

FPROTECT

1

2R

L++

RY501

D037

M M001(FAN)

SPEAKER

PHONES

JK441

+

SUB WOOFER OUT

JK501

RELAY DRIVEQ502

SUB WOOFERSWITCH

Q274

R-CH

AUDIO+9VJ803

SYSTEM CONTROLLERIC901 (3/4)

: TUNER (FM/AM)


DC DETECTQ505, 506

(GT44/GT55)

(Page 24)

(Page 24)

(Page 24)

(Page 26)

(Page 24)

HCD-GT22/GT44/GT55


7-4. BLOCK DIAGRAM PANEL, POWER AMP Section

REMOTE CONTROLRECEIVER

IC601

FL701FLUORESCENT

INDICATORTUBE

76 O-SWR-LED

I-KEY0 I-KEY3KEY0 KEY4 KEY0 KEY3

KEY0

KEY4

FLUORESCENT INDICATORTUBE DRIVER

IC701SYSTEM CONTROLLER

IC901 (4/4)

F906

RECTD902 905

PROTECTDETECT

Q011

RECTD001

RECTD910

D006

O-S-LED1 O-S-LED6

S601 608 (KEY0),S611 616 (KEY1),S621 628 (KEY2),S631 638 (KEY3),S641 649 (KEY4)S608 (GT44/GT55),S641 649 (GT55)

5O-POWER-RELAY

35I-AC-CUTRESET SIGNALGENERATOR

IC902

RESET SWITCHQ903 905

D902

+3.3V

BD+3.3V

UNREG +16V

VBUS+5V

EVER +10V

LEVEL SHIFTQ908

57I-PROTECTOR

90RESET

83 I-WAKEUPKEY

56 I-KEY4

66 I-VOL

2

13,

15, 1

6

DR35 [S0] DR16 [S19]38

1

9

DR0 [T0] DR13 [T13]

70

75

61

64

LED DRIVEQ601 606

GRID DRIVEQ701 714

D601 606(STREAM)

O-G-LED,O-V-LED,O-B-LED3

8

40LED DRIVEQ921 923

LED DRIVEQ607

D612SUBWOOFER

77 O-STBY-LED

81 I-SIRCS-IN

D611STANDBY

ROTARYENCODER

MASTERVOLUME

OPERATIONDIAL

S651

BASSD609

VOCALD608

GUITARD607

65 I-JOGROTARYENCODER

S652

94 X2

95 X1X902

20MHz

91 XT2

92 XT1X901

32.768kHz

SI O-NJM3427A-DATA49 84SCK O-NJM3427A2-CLK48 86CSb O-NJM3427FA2-CS51 68

RSTb O-NJM3427FA2-RESET52 69

(AC IN)

RY901

POWER ON/OFFRELAY DRIVE

Q903

VOLTAGESELECTOR

S901

D+1.5V+1.5V

REGULATORIC201

USB+3.3V

D008

D009D301, 302

D908

AUDIO+9V

M+9VM+7V

F907RECT

D011 014

RECTD021 024

F904F905RECTD402

F908F909RECTD401

D007

FPROTECT

+9VREGULATOR

IC021

+9VREGULATOR

IC011

+3.3VREGULATOR

IC006

+5VREGULATOR

IC007

+4VREGULATOR

Q901, 902

RELAY B+

3O-FRONT-SP-RELAY

52I-USB-MONI

8O-USB-POWER

4O-CD-POWER

B+ SWITCHQ041, 042

B+ SWITCHQ301, 302

B+ SWITCHQ303, 304

27VREGULATOR

Q902

AMPSECTION

B+

AMPSECTION

B+

FORFLUORESCENT

INDICATORTUBE

(GT22/GT55)

(GT44)

VFL

VFVF

PT902SUB POWER

TRANSFORMER

PT901MAIN POWER

TRANSFORMER

GT22: MX, AR, AUS/GT44: MX, AR, AUS/

GT55: MX, AR

GT22: E2, E3, E13, E51/GT44: E2, E3, E13, E51/

GT55: E2, E51

GT22: MX, AR, AUS/GT44: MX, AR, AUS/

GT55: MX, AR

(GT44/GT55)

(GT55)

45

46

XT

XTb

OSC

VDD+3.3V

D+3.3V,VREF+3.3V

+VHVH

+VLVL

F909F904RECTD401

+VCCVCC

AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V - 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model

(Page 25)

HCD-GT22/GT44/GT55


Note For Printed Wiring Boards and Schematic Diagrams

Indication of transistor

Note on Schematic Diagram: All capacitors are in F unless otherwise noted. (p: pF)

50 WV or less are not indicated except for electrolyticsand tantalums.

All resistors are in and 1/4

W or less unless otherwisespecified.

f : internal component. 2 : nonflammable resistor. 5 : fusible resistor. C : panel designation.

A : B+ Line. B : B Line. Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions. CD Board no mark : CD PLAY[ ] : USB USB Board no mark : USB TC Board no mark : TAPE PLAY( ) : TAPE REC : TAPE A{ } : TAPE B Other Board no mark : TUNER (FM/AM)( ) : CD PLAY[ ] : TAPE PLAY

: Impossible to measure Voltages are taken with a VOM (Input impedance 10 M).

Voltage variations may be noted due to normal produc-tion tolerances.

Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

Circled numbers refer to waveforms. Signal path.F : TUNER (FM/AM)J : CD PLAY

: USBE : TAPE PLAY (DECK-A)d : TAPE PLAY (DECK-B)G : TAPE RECf : AUDIO INN : MIC

AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC Area in E modelE3 : 240V AC Area in E modelE13 : 220V 230V AC Area in E modelE51 : Chilean and Peruvian modelsMX : Mexican model

Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. W : indicates side identified with part number. f : internal component. : Pattern from the side which enables seeing.(The other layers' patterns are not indicated.)Caution:Pattern face side: Parts on the pattern face side seen from(Conductor Side) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Component Side) the parts face are indicated.

Circuit Boards Location

C

BThese are omitted.

EQ

B

These are omitted.

C E

Q

Note: The components identified by mark 0 or dotted linewith mark 0 are critical for safety.Replace only with part number specified.

CD boardSW board

MOTOR (LD) board

SENSOR board

DRIVER board

MOTOR (TB) board

TUNER (FM/AM)

KEY LEFT board

KEY TOP board(GT55)

PANEL board

VOLUME board

KEY RIGHT board

USB board

MIC board

MAIN board

5V REG board

SUB WOOFER board (GT44/GT55)

AMP board

TC board

SW-SP board (GT44/GT55)

TRANS board

D-LIGHT SYNC board (except Australian model)

HCD-GT22/GT44/GT55


7-5. PRINTED WIRING BOARD CD Board : Uses unleaded solder. See page 27 for Circuit Boards Location.

R402

C404 C403

R405

R408

IC401

R108

R109

C136

C135

R128

R130

R134

R135

R136 R129

R139

R143R142R140

C124

C125

C122

C123

R151C138

C137

C140

C139

C142C141

C143R144

C100

C107

R414

C144C146

C145

C147C148

C149

C150

R148

R146

C105

C104

R145

R147

R149

R150

C118C117

CN301

C303

C302

C301

R102C127C126

R101C103

C113

C102

C101

C119

C120

R105

R106

C132

R104

R154 C1

16

R153

C109

C110 R110

IC101R210

R209

R218 R208

R219 R207R220 R206R221

R205R222

R204R223 R203

R157

R156

R202

CN202

C152

C151

R224

M401

S201

M402

C405

C401

R415

R114

C153R118

R212R213

C106

C306

R303

R304R302

R301

C307

Q301

C309

C128

C130

R155

C115

R111

R112

C133

R119

C112

C108

R214

R216R121

C201

C202

C204

C205R201

C206

IC201C207

R211

X102

X102

CD BOARD (CONDUCTOR SIDE)

1-872-620-

11

(11)

(LIMIT)

M

(SPINDLE)M

(SLED)

AMAIN BOARD

CN302

TP124(VC)

TP121(RFI)

OPTICAL PICK-UPBLOCK

(KSM-213DCP)

1

3

5

4

CD BOARD (COMPONENT SIDE)

1-872-620-

11

(11)

E

A

B

C

D

E

F

1 2 3 4 5 6 7 8 9 10

(Page 37)

HCD-GT22/GT44/GT55


7-6. SCHEMATIC DIAGRAM CD Board See page 36 for Waveforms. See page 58 for IC Block Diagrams. See page 61 for IC Pin Function Description.

IC B/D

AMAIN

BOARD(3/4)

CN302

2

1

IC B/D

OPTICALPICK-UPBLOCK

(KSM-213DCP)

M

M

DATACLK

++

+

R224 100

R121100

R108R109 100

R154

R153

C201

R304

R201

R110

R303

R203

R204

R205

R206

R207

R208

R209

R210

R219

R223

R222

R221

R218

R112

R202

R211

Q301

R301

C202

R157

TP121 (RFI)

TP124 (VC)

R156

CN301

R101

C401R415

R102

R1

28

R129

R143

R142 R139

R114R140

R151

R220

R150

R212

IC101

R105

R106

IC201

X102

C301

C307

C309

C100

C138

C153

C151

C204

C13

0

C12

8

C1

13

C1

27

C126

C103

C102

C120

C118

C117

C101

C1

24

C125

R145

R146

R147

R148

R149

C149

C105

C143

C146

C145C148

C104

C405 C404 C403

C205C116

C133

CN202

C110

R111

C115R155

C109

C132

R104

C123

C122

C139

C150

R136 R135

R134 C112 C108

R11

9

R118

C136C107

R130

R144

C144

C147

C140

C137

C141

C142

C106

R302

C306

C303C302

R405

R402

R408

R414

C207

C152

C206

IC401

1M

1M

10010V

2.2

0

10k

2.2

100

100

100

100

100

100

100

100

100k

100k

100k

100k

100k

100

0

100

2SA2119K

100k

10010V

100

100

16P

220

22010V47k

10k47

0k

1k

47k

22k 47k

10k0

0

100k

0

TK63115SCL-G@GT

0.1

1

0.001

0.1

470p

470p

0.1

0.1

0.0

022

0.1

0.1

0.1

0.01

0.01

0.022C1190.022

0.1

0.0

047

0.0

047

0

0

0

0

0

22p

0.1

0.01

470p

0.01

47p

0.1

0.10.1

0.1

0.1

0.1

0.1

0.1

100

226.3V

47

0.1

0.1

0

470p

470p

0.01

0.001

22k 470k

1M 0.1 0.1

47p0.1

4.7k

22k

0.1

0.1

0.01

0.01

0.0022

0.1

10010V

0

10010V

1010

10k

2.2k

2.2k

4.7k

1

470p

1

BA5826SFP-E2

SP-

SP+

SL+

SL-

100

R213 100

R214 100

R216 100

1M 1k

16.9344MHz

TC94A70FG-008 (S, D)

5p5

p

27P

0

100k

IC101CD-MP3 PROCESSOR

IC401FOCUS/TRACKING COIL DRIVE,SLED/SPINDLE MOTOR DRIVE

IC201+1.5V REGULATOR

SP-

SP+

SL+

SL-

M401(SPINDLE)

M402(SLED)

AUTOMATIC POWERCONTROL

S201(LIMIT)

0.1

(Page 40)

HCD-GT22/GT44/GT55


7-7. PRINTED WIRING BOARDS CHANGE Section : Uses unleaded solder. See page 27 for Circuit Boards Location.

JW702

JW703

JW704

JW705

JW706

JW707

JW70

8

JW711

CN705

JW712

JW701

JW70

9

JW713

JW714

JW710

R736

CN702

R751

C752

CN703

CN704

IC712

R713

Q731

C751

D711

D701

C737

R734

R733

R732

R723

R722

R721

R731

R712

R711

R702

R701

C736

C735

C741

C731

C715

IC701

CN701

CN721

M751

IC731

CN731

CN741

CN742

M741

CN751

S751

1-866-201-

12

(12)

1

2

E

DRIVER BOARD

BMAIN

BOARD

1

9

1

9

1

4S711ROTARY ENCODER

DISC TABLEADDRESS DETECT

1 2

M

MOTOR (LD) BOARD

1-687-133-

12

(12)

(LOADING)

12

SENSOR BOARD

1-68

7-13

2-

12

(12)

E

C

A

K

MOTOR (TB) BOARD

M

1-68

7-13

4-

12

(12)

1

3

(TABLE)

SW BOARD

1-687-669-

12

(12)

1

2

DISC TABLEOPEN/CLOSE

DETECTOPEN

CLOSE

A

B

C

D

E

F

G

H

1 2 3 4 5 6 7 8 9 10

(Page 37)

SemiconductorLocation

Ref. No. LocationD701 E-7D711 E-7

IC701 F-7IC712 F-8IC731 F-5

Q731 C-9

HCD-GT22/GT44/GT55


7-8. SCHEMATIC DIAGRAM CHANGE Section See page 58 for IC Block Diagrams.

C741

R702 R701

D701C751

R713

R712 R711

D711

CN721

R7

22

R7

21

R7

23

C7

36

C7

35

C7

37

R731

C731

R733

CN704

E3

E2

E1

CN703

CN742 CN702

CN741

IC731

CN751 CN705

C752 R751

CN731

Q731

M751

M741

IC701

IC712

R734 R732

CN701C715

R736

S751

0.01

100 470

MTZJ-T-775.1A0.01

22k

4.7k 1k

MTZJ-T-773.6B

2P

4.7

k

4.7

k

4.7

k

0.1

0.1

0.1

100

1050V

1k

2P

4P

5P 5P

3P

RPI-576

2P 2P

0.1 4.7k

3P

DTC114ESA

BA6956AN

BA6956AN

12k 10k

13P10016V

390

RN

FR

NF

TM-2

GND

TM-1

SENS-IN

SENS-OUT

GND

TM-1

TM-2

SENS-IN

SENS-OUT

GND

SENS-IN

SENS-OUT

GND

SENS-IN

SENS-OUT

GND GND

OPEN SW OPEN SW

LM-2

LM-1 LM-1

LM-2

GND

E-1

E-2

E-3

VC

C

OU

T2

GN

D

VR

EF

OU

T1

VM

FIN

RIN

VC

C

OU

T2

GN

D

VR

EF

OU

T1

VM

FIN

RIN

LM-R

TM-R

E-1

E-2

E-3

TBL ADDRESS SENS

OPEN SW

(LOADING)

ADDRESS DETECT

(TABLE)

OPEN

CLOSE

OPEN/CLOSE

DETECT

DRIVE

LOADING MOTOR

DRIVE

TABLE MOTOR

LEVEL

SHIFT

D+3.3V

M+9V

M-GND

M-GND

LM-F

TM-F

DISC TABLE

S711

DISC TABLE

DISC TABLE

ADDRESS SENSOR

ROTARY ENCODER

BMAINBOARD(3/4)

(Page 40)

HCD-GT22/GT44/GT55


7-9. PRINTED WIRING BOARD USB Board : Uses unleaded solder. See page 27 for Circuit Boards Location.

R928

CN904

C902

C903

C904

C905

C907R983

R901

R937

R938

C901IC915

C916

C917

R913

R915

X901

C909R919C910

C912

R981

R985

C908

R922

C913

R934

R986

C915

C906

C922

C921

R977

R978

R979

R932

R982

R984

R976

CN907

CN901

CN903

RB922 RB921

IC921

RB92

4RB

923

R975R974

R973R972

R971R970

R902

R941

R943 R9

04

R944

R905

R906

R903

R942

R907C930

FB902

D901

FB901

R917

R916

D902

C920

R925

R926

R924

R923

C914

R920R921

R945

R933

R947

R950

JR90

2

IC901

C919

D MAIN BOARDCN301

USB BOARD (COMPONENT SIDE)

1-872-405-

12

(12) 1-872-405-

12

(12)

USB BOARD (CONDUCTOR SIDE)

K

A/KA

A/K A

K

(NC)

C 5V REG BOARD

3 1

4 5

A

B

C

D

1 2 3 4 5 6 7 8 9 10

14

21

E MIC BOARDCN802

(Page 37)

(Page 37)

(Page 42)

HCD-GT22/GT44/GT55


7-10. SCHEMATIC DIAGRAM USB Board See page 36 for Waveforms. See page 58 for IC Block Diagrams. See page 61 for IC Pin Function Description.

C5V REGBOARD

EMIC

BOARDCN802

DMAIN

BOARD(3/4)

CN301

11

R986 100DATA

R985 100CLOCK

C9300

C9190.1

CLOCK

DATA

CLK

DATA

R970

R971

R972

R973

R974

R975

R976

R977

R979

R978

R932

R982

R984

RB922

RB921

RB923

RB924

C907

C906

C921

R9

01

C9

01

R9

37

R9

83

C9

02

JR9

02

C9

03

C922

R9

07

R9

06

R9

05

R9

04

R9

03

R9

02

R917

R9

15

R9

13

C9

08

R919

C909

R916

C910C912

R9

44

R9

43

R9

42

R9

41

C905C904

R933

R934

R938

C915

C913

C914

R981

R922

R924

R923

R921

IC921

CN904

R926

R925C920

IC915

C916

R920

CN907

CN903

CN901

FB902

FB901

D902

C917

R945

R947

IC901

R928

D901

X901

R950

100

100

100

100

100

100

100

100

100

100

100

100

100

47

47

47

47

0.1

0.1

0.1

10

k

0.1

10

0

10

0

10

16

V

0 10

16

V

0.1

4.7

k

4.7

k

4.7

k

4.7

k

4.7

k

4.7

k

0

10

k

10

0k

0.1

100

22p

0

22p10p

10

0k

10

0k

10

0k

10

0k

0.11016V

0

10k

100

0.1

0.1

0.1

100

100k

27

27

100k

IS61LV6416-10T

7P

15k

15k0.1

R5523N001BTR-F

0.1

10k

21P

5P

2P

4.7k

4.7k

0

9MHz

4.7k

A13

A14

A15

D0

D1

D2

D3

D4

D5

D6

D7

RD

WR

LB

UB

SR

AM

-CS

A8

A9

A10

D7

D4

D5

D6

WR

D0

D1

D2

D3

SRAM-CS

A11

A12

A13

A14

A15

LB

UB

RD

A7

A8

A9

A10

A11

A12

A4

A5

A6

D12

D13

D14

D15

A4

A5

A6

D8

D9

D10

D11

D12

D13

D14

D15

BU

S0

BU

S1

BU

S2

BU

S3

BU

CK

CC

E

USB-SI

USB-SO

DO

US

B-R

ST

LR

CK

BCK

REQ

ST-REQ

A-IN

GATE

LRCK

CCE

BUCK

BUS3

BUS2

BUS1

BUS0

DO

DI

USB-SO

USB-SI

BCK

A-IN

GATE

REQ

ST-REQ

USB-RST

DI

A7

A16

A16

A1

A2

A3

A1

A2

A3

D11

D10

D9

D8

BOOT

AMO

TXD1

RXD1

RES

ET

BOOT

AM0

TXD1

RXD1

RESET

EN

FLG

EN

FLG

MC2837

2206.3V

TMP92CD28FG-2CB4

MC2837

D+

D-

AM0

DVSS

DVSS

RV

OU

T1

RV

IN

RV

IN

RV

OU

T2 DVSS

DVSS

DV

SS

AM

1

X2

DV

SS

X1

VBUS-5V

DVDD+3.3V

DVSS

LRCK

CCE

BUCK

BUS3

BUS2

BUS1

BUS0

USB-RST

ST-REQ

REQ

GATE

A-IN

BCK

VBUS-GND

BOOT

RESET

RXD1

TXD1

DVSS

VCC

AM0

DI(CTS)

DO(RTS)

USB-SI(RXD)

USB-SO(TXD)

NC

A6

A5

A4

A3

NC

I/O8

I/O10

I/O11

VDD

GND

I/O12

I/O13

I/O14

I/O15

A2

A1

A0

I/O9

NC

A7

A8

A9

A10

I/O7

I/O6

I/O5

I/O4

GND

VDD

I/O3

I/O2

I/O1

I/O0

A11

A12

A13

A14

A15

WE

CELB

UB

OE

A1

3

GND

D+

D-

VBUS

EN

GND

OUT

INFLG

(USB)

(NC)

S-RAM

VBUS POWER ON/OFF SWITCH

A12

A11

A10

A9

A8

DVCC

A7

A6

A5

A4

A3

A2

A1

A0

D15

D14

D13

D12

D11

D10

D9

D8

DVCC

D7

D6

D5

D4

D3

S2

D1

D0

DV

SS

DV

CC

DV

CC

DV

SS

NO

US

E

NO

US

E

NO

US

E

DV

CC

G-3

NO

US

E

NO

US

E

DI

G-2

G-1

ST-REQ

REQ

DVCC

GATE

DATA

BCK

SCL

SDA

NO USE

RXD1

TXD1

CLOCK

DATA

DO

NO USE

USBPON

USBOC

DVCC

BO

OT

NO

US

E

SR

LU

B

SR

LL

B

RD

WR

CS

2

DV

CC

NO

US

E

/CC

E

/BU

CK

BU

S3

BU

S2

BU

S1

BU

S0

A1

6

A1

5

A1

4

USB CONTROLLER

LR

CK

/RE

SE

T

(Page 40)

(Page 43)

(Page 41)

HCD-GT22/GT44/GT55


IC30

1

IC401D401

Q303

Q402

Q301

Q401

Q302

Q408

Q304

Q306

Q404

Q410

Q405

Q407

Q406

Q454

Q305

Q403

Q409

C355

C354

C353

C352

C328

C327 C324

C323

C316

C315 C

304

C303

C302C301

C466

C462C461

C433 C430

C418C417

C416

C414C413

C412

C411

C406 C405

C404

C403

JR31

6

JR315

JR313

R351

R350R349

R326

R325

R324

R323

R322R321

R320R319

R318

R317

R316

R315

R314

R313

R312

R311

R310

R309

R308

R307

R306

R305

R304

R303

R302R301

R487

R486

R484

R483

R482R481

R464R463

R462R461

R459

R458

R457

R456

R455

R454

R453

R452

R451

R450

R449

R444

R443

R442

R441

R440

R438

R437

R436

R435

R434 R433

R432 R431R430

R429

R428 R427

R424 R423

R414R413

R412R411

R408R407R406

R405

R404

R403

R402

R401

D301

JR305

JR320

JR30

3

JR319JR308

JR31

8

JR307

JR301

JR30

9

JR302

JR31

1

JR304

JR310

JR31

7

JR30

6

BE

BE

1210

11

31

18

Q455

Q453

C356

C351

C350

C330

C329

C318C317

LP302

LP301

T001

C460

C456

C454

C453

C452

C410

C409

C402

C401

CN008

CN301

CN30

2

JW30

1

JW320

JW31

6

JW30

6

JW30

9

JW315

JW30

4

JW303

JW317

JW30

5

JW319

JW31

3

JW307

JW30

2

JW31

1

JW310

JW31

8

JW32

1

JW308

W302

W301JW312

BE

BE

B E

GS

GS

14 5

8

BE

BE

BE

145

8

BE

BE

BE

BE

BE

G S G S

1-872-797-

11

(11)

TC BOARDJ MAIN BOARDCN202

HRPE1REC/PB/

ERASE HEAD(DECK-B)

HP1(PB HEAD)(DECK-A)

D

D

D D

E

E

A

B

C

1 2 3 4

7-11. PRINTED WIRING BOARD TC Board : Uses unleaded solder. See page 27 for Circuit Boards Location.

(Page 37)

SemiconductorLocation

Ref. No. LocationD301 B-1D401 B-3

IC301 B-1IC401 B-3

Q301 C-1Q302 C-2Q303 C-2Q304 C-2Q305 C-3Q306 C-3Q401 C-3Q402 C-2Q403 C-2Q404 B-3Q405 B-3Q406 B-3Q407 C-1Q408 A-4Q409 A-3Q410 B-3Q453 B-4Q454 B-4Q455 B-4

HCD-GT22/GT44/GT55


7-12. SCHEMATIC DIAGRAM TC Board See page 36 for Waveforms

BOARD(2/4)

JMAIN

CN202

21

22

0.7

{0}

0.1

{6.6}0{6.8}

4

{4.2}

4

{4.2}

0.1

{6.6}

4{4.2}

0.1{6.6}

4

{4.2}

4

{4.2}

0.1{6.6}4

{4.2}

4

{4.2}

4

{4.2}

4

{4.2}3.3

{6.8}

3.3

{6.8}

0.1

{6.1}

0{4.8}(-10.5)

0{4.8}(-10.5)

0{4.8}(-10.5)

0{4.8}(-10.5)

0{4.2}(-3.6)

0{4.2}

4{4.2}

0.3(8.6)

0.3(5)

0.3(0.8)

0(0.2)

9.1(7.9)

(8.6)9.1

7.7{8}

0

4

{4.2}

4{4.2}

4

{4.2}

4

{4.2}

4

{4.2}

4{4.2}

7.7{8}

4{4.2}

4{4.2}

0

{6.8}(-10.5)0

{5.4}

4{4.2}

3.5(4.2)

(3.8)3.5

(4.2){3.8}

4{4.2}

(0.7)0

9.1(0)

0

3.1

4{4.2}

4{4.2}

4{4.2}

4

{4.2}

4

{4.2}

7.7

{8}3.5(4.2)

{3.8}

4{4.2}

4{4.2}4

{4.2}

0

0

{4.8}

(-10.5)

16V47

C452

1

2

3

4

5

6

7

8

9

10

11

11PCN008

NC

DECK-D-GND

O-BIAS

REC-MUTE

+9V

REC/PB SW

REC-L

REC-R

A-GND

PB-R

PB-L

50V0.1

C401

50V0.1

C402

0.1C430

47pC403

47pC404

10pC411

10pC412

0.01C417

0.01C418

470kR411

470kR412

220kR413

220kR414

150kR423

150kR424

220pC405

220pC406

220pC413

220pC414

6.8kR407

6.8kR408

50V10

C409

50V10C410

10R427

10R428

0.01C433

47kR442

10kR451

10R455

MC2838-T112-1D401

2SC3052EF-T1-LEFQ404





4.7kR453

4.7kR454

4.7R458

0.001C453

22kR457

6800pC454

0R459

0.01C456

2.2kR461

2.2kR462

1kR463

1kR464

470pC462

470pC461

0R487

22R449

22R450

22R456


47kR482

10kR481

0JR313

0R483

2.2kR484

100R349

10kR435

10kR436

2.2kR437

2.2kR438

100kR443

10kR444

50V10

C356

1kR431

47kR433

4700pC466

10kR429

4700pC416

47kR434

1kR432

10kR430

0R350

0R441

4.7kR307

4.7kR308

0.01C355

100R315

100

R31

6

47kR303

47kR304

1000

pC

303

1000pC304

220kR306

+

-

NJM4558V-TE2IC401(1/3)

3

21

+

-

NJM4558V-TE2IC401(2/3)

5

67

NJM4558V-TE2IC401(3/3)

8

POWER

4

GND

1000pC302

47kR301

47kR302

1000pC301

+

-

NJM14558V-TE2IC301(1/3)

3

2

1

+

-

NJM14558V-TE2IC301(2/3)

5

67

NJM14558V-TE2IC301(3/3)

8

POWER

4

GND

6800pC323

6800pC324

470R310

470R309

47R313

47R314

220R311

220R312

22kR319

22kR320

4.7kR323

4.7kR324

470kR317

470kR318

47pC315

47pC316

50V22

C318

50V22

C317220pC327

220pC328

16V220C350

0.1C353

1kR351

10V220C351

0.1C352

100R325

100R326

1

2

3

4

5

6

7

8

8PCN302

EH+

EH-

GND

REC-L

PB-L

PB-R

REC-R

GND

1

2

3

3PCN301

Lch

REF

Rch

UD

ZW-T

E17-

4.3B

D30

1

220kR305

0.1C354

0R486

100R321

100R322

6

2

1

3

5

4

T001

KTA1271Y-ATQ455

RT1N141C-TP-1Q409

RT1N431C-TP-1Q410

S

2SJ461Q301

S

2SJ461Q302

0JR315

0JR316

KTC3203Y-ATQ453

S

2SK2158-T2BQ303

S

2SK2158-T2BQ304

0.047C330

47kR401

47kR402

47kR404

47kR403

47kR405

47kR406

47kR452

10kR440

0.047C329

JW312

ISA1235AC1TP-1EFQ405





L-CH

R-CH

L-ch

R-ch

+

-

+

-

+

-

ERASE

TC BOARDA

101 2

J

H

B

1311

C

7 8

I

14

F

96

K

4 15 163

G

D

5 17

E

12

REC AMP

IC401

REC SWITCH

REC BIAS SWITCHQ454,455

REC CONTROL SWITCHQ409,410

BIAS OSC

MUTING

BIAS OSC

Q402,404

CONTROL SWITCHMUTING

MUTINGQ401,403

MUTING

MUTING

PB SWITCH(DECK-B)

PB SWITCH(DECK-A)

PB SWITCH(DECK-A)

PB SWITCH(DECK-B)

HRPE1(REC/PB/ERASE)

(DECK-B)

(PB)(DACK-A)

HP1

IC301PB AMP

DECK-A/B SELECTSWITCH,

REC-PB SELECTSWITCH

REC SWITCH

BIAS OSC

(Page 39)

HCD-GT22/GT44/GT55


Waveforms

CD Board

USB Board

TC Board

MAIN Board

PANEL Board

1 IC101 ia (RFi)(CD play mode)

200 mV/DIV, 500 ns/DIV

0.5 to 1.3 Vp-p

2 IC101 wf (XO)(CD play mode)

1 V/DIV, 20 ns/DIV

59.1 ns3.3 Vp-p

qa IC901 ud (X2)

1 V/DIV, 50 ns/DIV

111 ns3.7 Vp-p

ws Q453 (Collector) (REC mode)

5 V/DIV, 20 s/DIV

30.4 s10 Vp-p

ea IC901 oa (XT2)

1 V/DIV, 20 s/DIV

30.4 s2 Vp-p

50 ns1.6 Vp-p

es IC901 of (X2)

1 V/DIV, 20 ns/DIV

ed IC901 ih (O-NJM3427A2-CLK)

2 V/DIV, 2 s/DIV

3.2 s3.3 Vp-p

800 ns3.2 Vp-p

ra IC701 rh (XTb)

2 V/DIV, 500 ns/DIV

wa Q453 (Base) (REC mode)

1 V/DIV, 20 s/DIV

30.4 s2.1 Vp-p

HCD-GT22/GT44/GT55


7-13. PRINTED WIRING BOARDS MAIN Section : Uses unleaded solder. See page 27 for Circuit Boards Location.

B

E

B E

B E

B E

B EB E

BE

BE

B E

BE

BE

B E

B E

B E

B E B E B E

B E

BEB

B

E

E

1 458

1

4

5

8

B E

1

10

5

6

40

31

20

21

30

1

10 11

148

17

14817

916

1 8

BE

BE

BE

G S

3031

50

51

8180

100

1

BE

B E

BE

91

13 1C363

R362

R361

JR120

R290

R289

R016

R014

R013 R010

R202R201

Q261

R001

D159

Q252

Q251

IC902

IC901

D911

Q046

Q045

Q044

Q041

D904

D903

D902

D901

IC303

IC302IC301

R991

R990

IC103

IC102

JR11

9

C950

JR118JR115

JR114

JR113

JR112

JR111

C179

JR110

C178

C177

C176

C175

C174

C173

C172

JR109

C171JR107

JR10

6

C362

JR105

R979

C361

JR104

R977

Q011

C166

C165

C164

C163

C160

R962

R961R960

C152

C151

C150

R959

R958R957

C149

C147

C146

C145

C912

C140

R949

R948

R947R946

R175

R945

C139

R944

R174

R173

R943

R942

R941

C905

R940

C904

R170

C903

C133

C902

R939

R169

R938

R937

R936

R166

R935

R165

C128

R164

R934

R933

C127

R163

R932

R162

R355

R161

R354

R160

C123

R353

C122

R352

C120

R929

R159

R928

R158

R927

R157

R926

R156

R925

R155

C117

R923

R153

R922

R346

R152

CL001

R921

R345

R151

R920

C114

R344

R343

R342R341

R919

R918

R148

R917

R147

R916R915

R145

R914

R144

R913

R143

R912

R142

R911

R141

R334R910

R140

R333

R332R330

R909

R139

R908

R138

R137

R136

R135

R328

R134

R327

R133

R326

R901

R325

R131

R324

R130

R323

R322

R321

R129

R128

R127

R126

R125

R124

R123

R122

R121

R120

R312

R311

R310

IC25

2

R119

IC251

R116

R309

R308

R114R3

07

R113

R306

R112R3

05R111

R304

R110R3

03

R302

R301

R108

R105

R101

Q913

Q912Q911

Q905

Q904

Q903

D037

Q902

D036

D031

C285

C281

Q121

C277 C276

C275

D214

C274

D213

C273

D212

D211

Q114 Q113

Q112

Q111

C268

Q303

C267

Q301

C264

D009D008 D007

D006

C064C063

R293

R292

R291

C254

C253

C252

C251

R286

R285

R281

R280

R279

R278

R277

R276

R274

R268

R267

R265

R264

R263

R262

R261

R068

R064

C027

R063 R256

C026

R255

R061

R254

R253

R252

R251

R057

R055R054

R053

R052

R051

R050

C010

R049

R048

R047R046R045

R043

R042

R234

R232

R231R230

R037

R036

R229

R035

R228

R034

R227

R033

R226

R032

R225

R224

R223

R222

R221

R217R216

R215 R214

Q274

R213

R212

Q272

R211

112 3

3 1

1210

11

12 10

11

13

1 13

13

1212

13

14 3

+-

BE

BE

BE

1 23

1 23

1 23

E B B E

B E

20211

2

12

26

27

21

2627

451

2

61

BE

BE

A001

JW33

7

JW33

5

C289

JW336

JW179 JW17

8JW17

7 JW

176

JW175

JW17

4

JW173

JW17

2

JW17

1JW

170

JW16

9

JW16

8

JW16

7

JW16

6JW165

JW16

4

JW16

Documents

HCD-GT22_GT44_GT55 SONY GENEZI.pdf