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lg mdd62 service manual
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5/19/2018 LG MDD62 service manual
1/69
KARAOKE MINI
HOME THEATERSERVICE MANUAL
MODEL : MDD62(MDS62V)
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.
MODEL:MDD62(MDS62V)
SERVICEMANUAL
http://biz.lgservice.com
P/NO : AFN33894956 MAY, 2007
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CONTENTS
SECTION 1GENERALSERVICING PRECAUTIONS ......................................1-2
NOTES REGARDING HANDLING OF THE PICK-UP NOTES REGARDING COMPACT DISC PLAYER REPAIRS
ESD PRECAUTIONS ...................................................1-4
LOCATION OF USERS CONTROLS.........................1-5
SPECIFICATIONS ........................................................1-7
SECTION 2EXPLODED VIEWSCABINET AND MAIN FRAME SECTION ..................2-1
TAPE DECK MECHANISM EXPLODED VIEW ........2-31. TAPE DECK MECHANISM
(A/S & A/S : RIGHTA/S DECK)........................2-32. TAPE DECK MECHANISM(A/S & A/S : LEFT A/S DECK) ...........................2-5
DVD MECHANISM EXPLODED VIEW ......................2-7
SPEAKER EXPLODED VIEW ....................................2-9MODEL : MDS62V ...................................................2-9
PACKING ACCESSORY VIEW.................................2-13
WIRING DIAGRAM ....................................................3-22
BLOCK DIAGRAM.....................................................3-24
1. SMPS BLOCK DIAGRAM...............................3-24
2. MAIN & FRONT BLOCK DIAGRAM ..............3-26
SCHEMATIC DIAGRAMS .........................................3-28
1. SMPS SCHEMATIC DIAGRAM.......................3-28
2. MAIN SCHEMATIC DIAGRAM........................3-30
3. AMP SCHEMATIC DIAGRAM..........................3-32
4. DECK SCHEMATIC DIAGRAM.......................3-34
5. FRONT SCHEMATIC DIAGRAM.....................3-36
PRINTED CIRCUIT DIAGRAMS...............................3-38
1. MAIN P.C.BOARD............................................3-38
2. SMPS P.C.BOARD ..........................................3-42
3. FRONT P.C.BOARD ........................................3-44
SECTION 4
DVD PART ELECTRICALDVD ELECTRICALTROUBLESHOOTING GUIDE....................................4-1
1. POWER CHECK GUIDE...................................4-12. TEST & DEBUG FLOW.....................................4-23. USB PART..........................................................4-7
WAVEFORMS ...............................................................4-8O O
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NOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and
impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or
damage to the printed-circuit board.3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason
the adjustment point and installation screws should absolutely never be touched.4) Laser beams may damage the eyes!
Absolutely never permit laser beams to enter the eyes!
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
SERVICING PRECAUTIONS
SECTION 1 GENERAL
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NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components
are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components
can be damaged, and for that reason components should be handled with care.2) The pick-up is composed of many optical components and other high-precision components. Care must be
taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong
magnetism is present, or where there is excessive dust.
2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To prevent AC leakage, the metal part of the soldering iron should be grounded.5) Workers should be grounded by an armband (1M)6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent
static electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
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ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called electrostatically sensitive devices (ESD). Examples of typical ESD devices areintegrated circuits and some field-effect transistors and semiconductor chip components. The followingtechniques should be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drainoff any electrostatic charge on your body by touching a know earth ground. Alternatively, obtain andwear a commercially available discharging wrist strap device, which should be removed for potential
shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductivesurface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static"can generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals These can generate electrical charges sufficient to damage ESD
devices.6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together
by conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touchthe protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT,AND OBSERVE ALL
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LOCATION OF USERS CONTROLS
FRONT / BACK PANEL
1
3
45
6
7
8
9
10
11
12
13
2
1. NUMERIC buttons (0-9)
2. DISC DOOR
3. ( ) POWER button
OPEN/CLOSE button
4 DISPLAY WINDOW
7. PUSH EJECT position (TAPE 1)
PUSH EJECT position (TAPE 2)
8. MIC VOLUME knob : OPTIONAL
MIC Jacks (MIC1/ MIC2): 3.5mm : OPTIONAL
9 DISC SELECT buttons (1 2 3)
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1. POWER button
2. FUNCTION SELECT buttons
(TUNER / BAND, DVD / KARAOKE, AUX, USB)
3. NUMERIC buttons (0-9)
4. TAPE FUNCTION buttons
PLAY ( )
REWIND / FAST FORWARD PLAY ( )
TAPE 1-2 SELECT buttons (1-TAPE-2) RECORD / RECORD PAUSE ( / )
TAPE STOP ( )
5. SET UP button
6. ARROW buttons ( / )
(Selects an option in the menu)
PRESET (-/+) buttons ( )
TUN. (-/+) buttons ( )
7. SELECT / ENTER button
8. MENU button
(Use the MENU button to display the menu screen
included on DVD video discs.)
9. STOP ( ), PAUSE( ) / STEP, PLAY ( ) buttons
10.PROG. / MEMO., REPEAT, REPEAT A-B buttons
11 EQ XTS-Pro SOUND / FEMALE( )
REMOTE CONTROL
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SPECIFICATIONS
GENERAL
Power supply Refer to the main label.Power consumption Refer to the main label.
Net Weight 5.4kg (MDD102)
5.32kg (MDD 62)
External dimensions (W x H x D) 273 X 371 X 326mm
TUNER / AMPLIFIER
FM Tuning Range 87.5 ~ 108.0MHz or 65 ~ 74MHz, 87.5 ~ 108.0MHz
Intermediate Frequency 10.7MHz
Signal to Noise Ratio 60/55dB (Mono/Stereo)
Frequency Response 50 ~ 10000Hz
AM Tuning Range 522 ~ 1620kHz or 520 ~ 1720kHz
Intermediate Frequency 450kHz
Signal to Noise Ratio 30dB
Frequency Response 140 ~ 1800Hz
Output Power 50W + 50W (4, THD 10%)
T.H.D 0.5%
Frequency Response 40 ~ 20000HzSignal-to-noise ratio 75dB
DVD/VCD/CD PLAYER CASSETTE TAPE PLAYER
Frequency response (audio) 40 ~ 20000Hz Tape Speed 3000 3% (MTT-111.
Signal-to-noise ratio (audio) More than 75dB (1kHz) NORMAL-SPEED)
Signal-to-noise ratio (video) More than 55dB (1kHz) Wow Flutter 0.25%
Dynamic range (audio) More than 80dB (MTT-111, JIS-WTD)
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MEMO
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BRASS MOTORPULLEY MAYBE CHANGED
FORWOW FLUTTERWHENNECESSARY
RING FW MAYBE ADDED
FORWOW FLUTTERWHENNECESSARY
001
002
006
007
008
016 017
018
019
020
003
A00
009
009
A02
A01
011
013
022
025
015
023
TAPE DECK MECHANISM EXPLODED VIEW
1. TAPE DECK MECHANISM (A/S & A/S : RIGHT A/S DECK)
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RING FW MAYBE ADDED
FORWOW FLUTTERWHENNECESSARY
013
011
009
009
003
008
015
022
023
024
016 017
018
019
020
007
A03
A00
2. TAPE DECK MECHANISM (A/S & A/S : LEFT A/S DECK)
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SPEAKER EXPLODED VIEW
A80
851
852
850
854
856
856
855
853
A80A
857
857
WIRE80
A80B
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2-11 2-12
MEMO MEMO
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PACKING ACCESSORY VIEW
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AUDIO ELECTRICAL TROUBLESHOOTING GUIDE
SECTION 3 AUDIO PART ELECTRICAL
1. POWER (SMPS)
No .5.6VA
YES
Is the F101 normal? Replace the F101 (Use the same fuse)
YES
NO
Is the BD101 normal? Replace the BD101
YES
NO
Is the TH101 normal? Replace the R101
YES
NO
Is Vcc (9V - 18V)
supplied to IC101 Pin2?
Is the D102 normal?
YES
NO
NO
Check or Replace the D102
IS the D959 normal? Replace the D959
YES
NO
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No 5.0V
Is the Vcc(5.6V)supplied to IC957 pin1? Check or Replace the D959
YES
YES
NO
Is the IC957 pin4 H?Check the CD CTL H
signal from -com
YES
NO
Check or Replace the IC957
No 3.3V
Is the Vcc(4.2V)supplied to IC955 pin1? Check or Replace the D943
YES
YES
NO
Is the IC955 pin4 H?Check the P CTL H
i l f
NO
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No -12V
Is the voltage 0fC932 -13V
Check or Replace the D970
YES
YES
NO
Is the IC155 pin212V?
Check the PWR CTLH signal from -com
YES
NO
Check or Replace the Q942
No VF+
Is the ZD950Normal?
Replace the ZD950
YES
YES
NO
Replace the R993 or Q950, Q943
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MICOM part check I
YES
YES
YES
Check P-SENS(P7904)_PIN6.
NO Refer toSMPS troubleshooting.
YES
YES
Check bothend voltage of IC101
(KIA7042).
Checkif input voltage of
IC101(KIA7042) isover 5V.
YES
NO Check theperiphery of IC101
(KIA7042).
NO
YES
Check if IC101(KIA7042) ofoutput voltage is over 4.3V.
Check voltage of IC10078KO/KF2_PIN1.
NO Replace IC101(KIA7042).
2. MICOM PART CHECK I
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3. MICOM PART CHECK II
MICOM part check II
CheckCheck Q102 base
NO NO
YES
YES
Check ifvoltage of P7904_PIN5
is 5.6V.
NO Refer toSMPS troubleshooting.
YES
Checkboth end voltage of
D101
YES
YES
Check D101.
NO Check if output ofD101(1SR35) is 5V.
OK
Check if output of IC101
NOReplace D101.
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CheckIC100(78KOKF2)_
PIN 22, 24
OK
YES
YES
Refer tomicom troubleshootingCheck micomvoltage 5V.PIN22DATA PIN24 CLK
NONO
YES
Replace micom.Check micom.NO
YES
OK
4. IC103(KS4CD21CS) CHECK
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FLD display check
YES
Replace P3702.Check eachPIN voltage.
NO
NO
YES
YES
OK
Refer to SMPS
5. FLD DISPLAY CHECK
YES
YES
CheckP7904_PIN1, 2, 3 voltage
input.
NOCheck P3702 connection.
YES
Check P3702connection and power.
Pin1 : FL-22 Pin2 : FL+26Pin3 : VKK- over
26V.
Check if both end votageof F1, F2 are over 3.7V.
VKK : over 26V.
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6. PWM MODULATION PART CHECK
PWM modulationpart check
YES
YES
YES
YES
P7905_PIN93.3V checking
Check IC604(PS9829)
VDD PIN voltage(3, 7, 8,10, 22, 29, 39, 47, 56, 65,
72, 94).Check X601_PIN2 3.3V.
NO Refer toSMPS troubleshooting.
YES
YES
YES
YESCheck IC605_
PIN3 input and PIN2output.
CheckX601 12.288MHz
operation.
Check IC605_PIN8 3.3V.
Check IC605_PIN3 input
Check X6012.288MHz
NO
NO
Check FB614BEAD input, output and
voltage.
NO
Check X60112.288MHz.
Replace X601.
OK
NO
OK
YES
YES
NOReplace FB614
NO
Check IC605_PIN2 output
Replace IC605.NO
NOReplace X601.
OK
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Power AMP part check
YES
Check each LINE registor output voltage.IC700 : R701, 702, 726, 727
NO
Check each
IC700, 701, 702, 703PIN1,17, 18, 19, 36 +12V
input.
Refer to SMPS troubleshooting.
YES
YES
YES
NOP7905_3PIN : +12V,PIN13, 14, 15 : 35V.
Check PWM modulator input.
Each IC PIN4 6 14 16
Check each IC700, 701, 702, 703
PIN21, 26, 29, 34 input voltage.
7. POWER AMP PART CHECK
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8.AUX FUNCTION CHECK
AUX function check
Check -COM(IC301)_PIN83, 84 commucation.
NO NO
YES
Replace IC200
YES
YES
YES
CheckIC200(BU4052)_
PIN4, 11 inputwaveform.
CheckIC200(BU4052)_PIN16
VDD, PIN8 VSSpower.
YES
Check IC200(BU4052)_PIN3, 13 output waveform.
Check JK800 connection.
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9. TUNER FUNCTION CHECK
TUNER function check
YES
Check IC200(BU4052)_PIN16 VDD, PIN8 VSS power.
NO
CheckIC200(BU4052)_PIN3, 13
output waveform and IC601(BU4052)_PIN2,15 input
waveform.
Check TUNER module voltage(PIN2 : 9V).
YES
YES
YES
NOCheck TUNERmodule(TU601) operation.
YES Replace IC200.Replace IC200.
Check IC200(BU4052)_PIN1, 12 input
waveform.
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10. TAPE FUNCTION CHECK
TAPE function check
YES
Check IC200(BU4052)_
PIN16 VDD, PIN8 VSS power
YES
YES
NOCheckIC200(BU4052)_PIN2, 15 input
waveform.
YES
Replace IC200.Replace IC200.
Check IC200(BU4052)_PIN3, 13output waveform and IC601(BU4052)_
PIN2, 15 input waveform.
YES
TAPE PCB ASS`Y
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11. TAPE PLAY PART CHECK
TAPE PALY part check
Replace head wire and tapedeck mechanism.
NO NO
YES
YES
Check A deck head input
IC201_PIN32, 39 and B deckhead input IC201_PIN34, 37.
YES
YES
YES
Check IC201_PIN5, 26 signal
output.
CheckIC201(HA12237)_PIN16
12V input.
Check A/Bdeck head input.
NO Refer toSMPS troubleshooting.
Replace IC201.NO
YES
Check IC201
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12. TAPE REC PART CHECK
TAPE REC part check
YES
Check IC201_PIN7, 24 record input.
YES
YES
YES
CheckIC604(PS9829)_PIN49, 52
PWM output.
Replace IC201.NO NOCheck IC201_
PIN10, 21 output.Check IC100_PIN23
"HIGH"
NO Refer to PWMmodulation troubleshooting.
YES
OK
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INTERNAL BLOCK DIAGRAM OF ICs
1. ES6838
SDRAM/ROMInterface
GPIO
+
Gateway
DMAController
TV-EncoderVDAC
HDMI I/F
DisplayOSD / SPUController
ScalerDeIntelacer16 K Cache
32-BitRISC
Processor
Audio ADC
Serial AudioInterface
Audio DAC
USB
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2. HA12237F
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3. PS9829B
MBCK
SBCK
SLRCK
MLRCK
MSDIN[0:3]
SSDIN[0:3]
MIC_MCLK
DMIX_MCLK
OLRCK
OBCK
DMIX_SDOUT
PWM1_P/M
PWM2_P/M
PWM3_P/M
PWM4_P/M
PWM5_P/M
PWM6_P/M
PWM7_P/M
PWM8_P/M
PWM_HP_L_P/M
PWM_HP_R_P/M
PWM_SWL_P/M
EPD_ENA
OVERLOAD
MIC_BCK
MIC_LRCK
MIC_SDIN
SPI/I2C
SO/SDA
SCK/SCL
SI/I2C_AD0
/CS/I2C_AD2
EXT_MUTE
CLK_
IN
/RESET
PLL_
DVDD
PLL_
DVSS
PLL_
AVDD
PLL_
AVSS
DVDD
DVSS
IO_
VSS
IO_
VDD
Internal Controls
Internal Clock Internal Reset
Host
Interface
(I2C, SPI)
Mic,
Input
Processor
Input
Mapper
Sample
Rate
Converter
Input
&
Output
MUX
Serial Audio
Output
Interface
Down
Mixer
Mixer 4 Band
EQ
Bass
Manager
Main
Volume
Trim
Volume
Serial
Audio
Output
Interface
PWM
Modulator
POP
NRPower Supply
OutputMappe
r
PLL
Reset & Power Down
Automatic
Gain
Limiter
4. PT6324
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5. STR-S6757IF1905
4Vcc
StartStopBurst
Protection
latch
DRIVE
Reg
Delay
Burst
Control
GND
S
D
FB
FB
Q
Q
S
S
R
R Q
S
Reg&Iconst
6
3
2
1
OVP
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6. TAS5142
2nd-Order L-C
Output Filter
for Each
Half-Bridge
2-Channel
H-Bridge
BTL Mode
System
Microcontroller
OUT_A
OUT_B
OUT_C
OUT D
BST_A
BST_BRESET_AB
RESET_CD
PWM_A
PWM_C
PWM_B
VALID
Left-
Channel
Output
Right-
Channel
Input
HBridge 1
Input
Bootstrap
Capacitors
2nd-Order L-C
Output Filter
for Each
SD
OTW
Output
H-Bridge 2
Output
H-Bridge 1
OTW
SD
TAS5508
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7. U1739EJ2V1UD00/KF2_E
Port 0 P00 to P067
Port 1 P10 to P178
Port 2 P20 to P277
Port 3 P30 to P334
Port 4 P40 to P478
Port 5 P50 to P578
Port 6 P60 to P678
Port 7 P70 to P778
Port 12 P120 to P1245
Port 13 P130
Port 14 P140 to P1456
Buzzer output BUZ/P141
16-bit timer/
event counter 00
TO00/TI010/P01
TO01/TI011/P06
TI000/P00
TI001/P05
TOH0/P15
TOH1/P16
TI50/TO50/P17
TI51/TO51/P33
R D0/P11
RxD6/P14 (LINSEL)
16-bit timer/
event counter 01
8-bit timer H0
8-bit timer H1
Watchdog timer
78K/0
CPU
coreFlash
memory
BANKNote 1
Watch timer
8-bit timer
event counter 50
8-bit timer
event counter 51
Internal low-speed
oscillator
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MEMO
WIRING DIAGRAM
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3-22
23P
VIDEO
JACK
5P
5P
5P3P
DVD PCB
2.1 CH SPK TERMINAL AUX
JACK
TUN
ER
MOD
ULE3 CHANGER MD
MAIN
PCB
DECK PCB
DOUBLE DECKMECHANISM
15P
12P
8P
8P
8P3P 15P
29P
USB MIC H/P FRONT PCB
SMPS PCB
15P
8P
4P
[Total CNT Q'ty : 16ea]
1. SMPS MAIN : 2ea
2. MAIN DVD : 2ea
3. MAIN DECK : 2ea
4. MAIN FRONT : 1ea5. FRONT DVD : 1ea
6. DVD MD : 5ea
7. DECK MECHA. : 3ea
3-23
BLOCK DIAGRAMS
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AC INPUT
ZNR &
FILTER
T
R
A
N
S
MAIN&
PWM IC
12V (78R12)
5V(P-SENS)
5.6VA (KIA278R05)
CN2
CN1
AMP (+) 3 1.5V
3.5V (278R35)
RECTIFICATIONSMOOTHING
CIRCUIT
BETWEEN FL1 AND FL2(4.5V)
-12V
FEED BACK
-31. 5V(VKK)
3-24 3-25
1. SMPS BLOCK DIAGRAM
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USB
FL +/-
FR +/-
TAS5152or
TAS5142
Digital
Power
AMP
FL
FR
PS9830
PWM
Modulator
78F0546
AUDIO
MICOM
9830_R
9.8304MHz12.288MHz
STCLK/DATA
5142_RST
5142_SD
DEC
KA
DECKB
HA12237F
Cassette
Deck
ASP
L/R, REC_L/RERASE
L/R
TR DRIVER
DECKS/W
REC_MUTE, PB_MUTE, TAPE_A/B
SOL_A/B, MOTOR, REC_BIAS
HALL_A/B, LEAF_A/B
TUNE
RMODULE
BU4052
AUDIO
S/W
RDS_CLK / DATA, PLL_DO / CLK / CE
PLL_DI, T_MUTE
REC_L / R
DECK_L/R
AUX
4052_A / B
H/P
MIC
TUNER_L / R
AUX_L / R
BA3308
OPAMP (ALC)
H/P_L / R
FLT
DISPLAY
PT6324
FLT
DRIVER
KS24C021
EEPROM
EEPROM
CLK/DATA
VFD_STB / DI / DO / CLK
AK5358
2CH. ADC ES8380
MPEG
DVDRX/TX,RST
AUDIO L / R DA_LRCK / BCK / ADATA0 / 1 / 2 / 3
AD_ADATA
MCLK
ADC_RST
MIC_SIG
USB D+ / D-
KS24C021
EEPROM
EEPROM
CLK/DATA
SDRAM FLASH
DMA[0:1
0]
DB[0:15]
LD[0:7
]
LA[0:21]
IP9011
MOTOR
DRIVER
RGB CVBS S
VIDEO
Y/G, PR/R, PB/B, CVBS, Y, C
PICK UPPICK UP
MOTORMOTOR
MDMDSENSOR, OP/CL/UP/DN SW, LIMIT
SPINDLE, SLED
LOAD, TURRET
TR +/-, F +/-
A, B, C, D, E, F, RF
SVREF,
DRV_MUTE
TRO, FO, SLD,
SPO, TUR, OP/CL
I-POD
[4]
[4]
[4][3]
[3]
[6]
[3]
[5] [2]
3-26 3-27
2. MAIN & FRONT BLOCK DIAGRAM
SCHEMATIC DIAGRAMSWHEN SERVICING THIS CHASSIS, UNDER NOCIRCUMSTANCES SHOULD THE ORIGINALDESIGN
SCHEMATIC FOR EASY IDENTIFICATION. THISCIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER
1. Shaded( ) parts are critical for safety. Replace onlyith ifi d t b
IMPORTANT SAFETY NOTE :
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1. SMPS SCHEMATIC DIAGRAMCIRCUMSTANCES SHOULD THE ORIGINALDESIGNBE MODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE LG CORPORATION. ALL COMPONENTSSHOULD BE REPLACED ONLY WITH TYPESIDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.SPECIAL COMPONENTS ARE SHADED ON THE
CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFERFROM THE ACTUAL CIRCUIT USED. THIS WAY,IMPLEMENTATION OF THE LATEST SAFETY ANDPERFORMANCE IMPROVEMENT CHANGES INTOTHE SETIS NOT DELAYED UNTILTHE NEW SERVICELITERATURE IS PRINTED.
with specified part number.2. Voltages are DC-measured with a digital voltmeter
during Play mode.
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2. MAIN SCHEMATIC DIAGRAM
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3. AMP SCHEMATIC DIAGRAM
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4. DECK SCHEMATIC DIAGRAM
O SC C G
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5. FRONT SCHEMATIC DIAGRAM
1 MAIN P C BOARD
PRINTED CIRCUIT DIAGRAMS
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1. MAIN P.C.BOARD(TOP VIEW)
MAIN P C BOARD
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MAIN P.C.BOARD(BOTTOM VIEW)
2 SMPS P C BOARD
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2. SMPS P.C.BOARD
3 FRONT P C BOARD
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3. FRONT P.C.BOARD
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DVD ELECTRICAL TROUBLESHOOTING GUIDE
SECTION 4 DVD PART ELECTRICAL
1. POWER CHECK GUIDE
Power ON
YES
YES
YES
YES
Does DVD/CD
appear at FLD?
DoesDISK1 appear
at FLD?
Does itappear DVD ERROR
at FLD?
Func
Power ON
DoesAUX, FM 87.5.AM,
USB appear atFLD?
YES
Check connector(P400, P4004, P401).
Does No DISC orTime are appeared
at FLD?
NO
NO NO
NO
NO
OK
Reconnect it.
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2. TEST & DEBUG FLOW
Check AV cableconnection to TV set.
Power ON
Check connection linesbetween FLASH & ES8380 or
the FLASH access time whetheris suitable or not.
NO NO
YES
Show LOGO?Flash
memory operatesproperly?
Check connection linesbetween SDRAM (IC502) &ES8380 or the SDRAM is
damaged.
NO
YES
SDRAM worksproperly?
Check the relatedcircuit of ES6698FD (IC501)PIN133,134,137,138,139,140
NO
YES
ES8380VIDEO outputs
properly?
YES
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Do not put in discand tray close.
Check the MD
Doesthe SLED
move to inner sidewhen it is at outer
position?
Moter driver DRV-MMUTE PIN is
high 3
NONO
YES
YESYES
Check the related
circuit of SLED and
motor driver IC (IC401)
SLEDsignal is OK?
NO
B
Check the cable
connection with MECHA.
YES
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Put disc in tray. Laser off
Check the laser power circuitbetween ES8381 and power
transistor. (Q405, Q406)
Laserturns on whenreading disc?
DVDLDor CDLD output
properly?
NONO
NO
YES
Check the related circuit oflaser power transistor.
Collectorvoltage of powertransistor is OK?
(Q405, Q406)
NO
YES
YES
YES
C
Check cable connection
between P400 andpick-up head.
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Check the connections betweenPDM01 and pick-up head.
Check the related circuit ofES8380 focus signal.
Focus on OK?
Propersignal on A, B, C, D
from MD?
NO
ProperFOO signal on
IC401?
NO
NO
YES
YES
YES
D
Check cable connectionbetween P400 and MD.
Check the related circuitbetween IC401 and ES8380Tracking OK?
ProperTRO signal on
IC401?
NONO
YES
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Check the connections betweenES8380 and P4703
Alloutputs are OKduring playing
DISK?
Audiosignal data onP8380 is OK?
NONO
YES
YES
E
Check the MAIN PCB
For example composite video,check the video mute TR
(Q411), output of video bufferIC (IC407) and ES8380
video signal data
TEST END
Picture
signal data onES8380 is OK?
NONO
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3. USB PART
TURN ON USB
NO
Check the POWER supply circuit.
(Check P5701)
NO
Check the HRST# signal
Check the USB PART andDVD PART line.
NO
Check the USB DATA LINE. (P5301)
Checking orUSB display check
NO
YES
Check the USB JACK POWER supply.
(Check P5301)Reading OK check
NO
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WAVEFORMS
1. WHEN POWER ON, RESET & DATA ETC WAVEFORM
1. RESET(DVD)2. RX3. TX4. LCS3# (FLASH)
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2. OPEN / CLOSE WAVEFORM AT POWER ON
1. open2. UP-sw3. DOWN-sw4. close
3 STARTING ACTION WAVEFORM IN MD DEVICE
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4. FOCUS WAVEFORM (AT CD)
1. F+2. F-(NO DISK)
5 FOCUS WAVEFORM (AT DVD)
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6. AT POWER ON, SPINDLE SIGNAL AT MD DECK
1. Spind2. Spin+3. Spin-
7 AT FIRST ACTION FOCUS SIGNAL A B C D
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8. TRACKING SIGNAL
1. Tro2. Tr-3. Tr+
9 RF WAVEFORM
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10. DISK TYPE JUGEMENT WAVEFORM
1. F+2. FDO3. SVRRF
(DVD)
MEMO
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MEMO
SCHEMATIC DIAGRAMS
1. MPEG SCHEMATIC DIAGRAM
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2. SERVO SCHEMATIC DIAGRAM
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3. INTERFACE SCHEMATIC DIAGRAM
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DVD P.C.BOARD(TOP VIEW)
PRINTED CIRCUIT DIAGRAM
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DVD P.C.BOARD(BOTTOM VIEW)
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MEMO MEMO
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