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ENGINEERED TO ENTERTAIN
SERVICE MANUAL
171717 59:5759:5759:57
SPECIFICATIONS Digital output Coaxial and Optical SPDIF Output voltage 500mV pk‐pk Output impedance 75Ω Optical output Toslink Sample rate accuracy 44.1k ± 50ppm Clock jitter <80ps Disc compatibility CD Audio, CD‐R Dimensions (H x W x D) 73 x 215 x 360 (mm), 2.8 x 8.4 x14.1 (inches) Weight 3.5kg
CYRUS CD Xt Signature CD PLAYER
SERVICE CAUTIONS
© Cyrus Audio Ltd Aug 2014 Cyrus CD Xt Signature Service Manual Issue 1
These two symbols shown are displayed prominently on the CD player base cover label. They indicate that the following cautions must be observed by all personnel‐
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER OR BACK.
THERE ARE NO USER SERVICEABLE PARTS INSIDE THE PRODUCT.
ALWAYS REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION! LIVE MAINS VOLTAGES ON THE MAIN PCB!
When undertaking any repair work on the CD player, engineers should note that the player includes a switching power supply connected directly to live mains and other high voltages, located on the main PCB in the area highlighted in the red box.
To avoid the danger of electric shock ‐
Always unplug mains power before removing the main PCB.
Never connect mains power to the mains inlet or main PCB if the main PCB has been removed from the chassis.
When tracing signals anywhere on the main PCB exercise caution to keep fingers, tools and test probes etc away from the high voltage power supply section of the PCB.
Never use a grounded test probe to test the high voltage (primary) part of the power supply.
Ensure that the chassis insulator is correctly fitted under the mains PCB before refitting it into the chassis.
SERVICE CAUTIONS
© Cyrus Audio Ltd Aug 2014 Cyrus CD Xt Signature Service Manual Issue 1
The photo below shows the position of caution labels that alert the service technician to the presence of a laser device –
On the back panel
And on the disc loading mechanism
SERVICE MANUAL INDEX
© Cyrus Audio Ltd Aug 2014 1 CD Xt Signature Service Manual Issue 1
INDEX
SMD component replacement ..................... 2 Type identification ....................................... 4 Block diagram .............................................. 5 Technical description ................................... 6 Fault finding/disassembly ............................ 8 Flash Software ........................................... 11 MC‐BUS operation ..................................... 12 Chassis parts drawing/list .......................... 13 Front panel parts drawing/list ................... 15 Main PCB parts list ..................................... 16 Servo PCB parts list .................................... 21 Circuit diagrams ......................................... 24
SMD COMPONENT REPLACEMENT
© Cyrus Audio Ltd Aug 2014 2 CD Xt Signature Service Manual Issue 1
Handling
SMD resistors and capacitors are widely used in the Cyrus range of products. When handling SMD components, certain precautions should be observed‐
Handling SMD resistors and capacitors
Always store SMD components in their original packaging or in a cool dry environment.
Always handle SMD resistors and capacitors with tweezers or a vacuum pencil.
Never handle SMD resistors and capacitors with fingers.
Hold the SMD component by the body, not by the ends.
Do not use SMD resistors or capacitors if the ends are dirty or discoloured.
Do not use SMD resistors or capacitors if they have been dropped on the floor‐ they may be internally damaged.
Always use replacement components of the correct size and shape. SMD components are available in many different packages. Where possible, order original parts from Cyrus.
Handling SMD ICs
Always store these components in their original packaging or in a cool dry environment.
Always handle SMD transistors and ICs with tweezers or a vacuum pencil.
Never handle SMD transistors and ICs with fingers.
Ensure that the connection pins of larger multi‐pin ICs are not deformed or damaged before fitting.
Measuring circuits with SMD capacitors and resistors
Avoid using sharp, pointed probes directly on the component end caps.
Measure voltages from the PCB pad next to the component.
Static precautions
SMD components, particularly ICs, may be damaged by the static levels present in the workshop. Damage caused by static may not immediately cause component failure but could cause partial damage and a possible failure in the future. Observing these simple SMD precautions will avoid product failures related to static damage‐
Always wear a grounded wristband when replacing any electronic components.
Always store components in their original packaging or conductive plastic bags.
Never store components in plastic trays or bags without protection.
Soldering/desoldering SMD components
Never re‐use old SMD components after de‐soldering!
Always apply solder heat directly to the contact area. Avoid over‐heating adjacent components.
Always repair SMD PCBs with the correct tools. SMD components can only be replaced with a hot air pencil or soldering iron designed for SMD components, preferably with temperature control.
Keep the soldering temperature as low as possible. 370ºC is recommended for Lead free SMD rework. Most SMD components will withstand 370ºC for 5 to 10 seconds
SMD COMPONENT REPLACEMENT
© Cyrus Audio Ltd Aug 2014 3 CD Xt Signature Service Manual Issue 1
When using solder paste a pressure dispenser should be used to ensure the correct amount of solder is applied to each pad.
Solder paste should not be used with direct heating methods as the solder between component pins may not be melted.
If necessary, remove excess solder paste with solder braid.
Removing SMD resistors and capacitors from the PCB with a soldering iron
1. Fit the soldering iron with a tip large enough to bridge both ends of the component. 2. Place the soldering iron so that its flat tip will heat both ends of the component at once. 3. When the solder melts, remove the component with tweezers. 4. Allow the PCB to cool for a few minutes, removing any excess solder with desoldering
braid.
Fitting replacement SMD resistors and capacitors to the PCB with a soldering iron
1. Apply a little flux to the connections. 2. Place the component in position. 3. Tin the soldering iron, bring the tip into contact with the PCB pad and flow solder to the
joint. Avoid bringing the soldering iron tip directly into contact with the component.
Removing SMD ICs from the PCB
1. Using fine tipped side cutters or tweezer cutters, snip all the leads of the device and remove the IC body.
2. Desolder the leads from the PCB pads. 3. Clean up the PCB with solder braid.
Removing SMD ICs with a hot air SMD tool
1. Fit a suitable size tip for the IC being removed. 2. Heat the IC evenly until the solder melts. 3. Remove the IC with tweezers.
Fitting replacement ICs to the PCB with a soldering iron
1. Check that the pins of the IC are not distorted. 2. Using tweezers, position the IC over the footprint. 3. Check that all the IC pins are correctly aligned with the pads. 4. With a very fine tip soldering iron, solder in the pins at the corners of the IC. 5. Re‐check the alignment and correct if necessary. 6. When the alignment is OK, solder the remaining pins of the IC to the PCB.
TYPE IDENTIFICATION
© Cyrus Audio Ltd Aug 2014 4 CD Xt Signature Service Manual Issue 1
Rating label
The CD Xt Signature carries a rating label on the rear panel, which includes details of the rated power supply voltage.
Nominal power voltage
This will be 220‐230V For use on nominal 220V ‐ 240V AC mains supply.
Power consumption
The maximum power consumption figure is indicated.
Serial number
Each CD player carries a serial number code, which identifies the following‐
Type of product
Market destination
Build number
Paint finish (colour)
The serial number is on the baseplate. It is therefore important to ensure that a baseplate removed from a product is re‐fitted to the same product. In any communications with Cyrus Service or Quality departments it is essential that the full serial number is quoted so that original specification parts and service information may be supplied.
PCB Identification
Each PCB is marked with a design revision number and this number should be quoted in all correspondence to the service department when requesting technical advice or requesting spare parts. The table below shows a typical PCB marking.
Revision number PCB marking
Main board revision 1 IS2112N1
BLOCK DIAGRAM
© Cyrus Audio Ltd Aug 2014 5 CD Xt Signature Service Manual Issue 1
uC
on
tro
ller
IC7
01
MC
BU
S
OP
TIC
AL
Main PCB
CO
AX
IAL
LC
DIR
Key
s
RAD
FOC
MOT
SLED
BA
59
84
FP
SA
A7
82
6
Servo
PCB
LOA
D/
UN
LOA
D
IC4
01
IC4
02
IC6
01
74
HC
T8
6
IC6
04
74
HC
T1
4L
PC
17
52F
BD
80
IC6
02
DA
TA
RE
FO
RM
AT
TIN
G
IC6
03
74
HC
74
74
HC
57
4
SP
DIF
SPDIF ENCODER
IC402
AK4103
SP
DIF
BC
K
WS
DA
TA CO
NT
RO
L
CL
OC
K R
EG
EN
ER
AT
ION
IC6
05
74
HC
404
6X
TA
L60
1IC
60
67
4H
C1
61
BC
KW
SD
AT
AX
CL
K
BC
K
TECHNICAL DESCRIPTION
© Cyrus Audio Ltd Aug 2014 6 CD Xt Signature Service Manual Issue 1
PCB assemblies
The following is a brief description of the internal PCBs found in the CD Xt Signature.
The servo PCB is mounted directly onto the CD mechanism, this includes the CD loader motor and sled drivers, the servo driver and CD decoder.
The main PCB is mounted in the base of the chassis and contains the power supplies, optical and coaxial SPDIF output and the user interface microcontroller. Disc reading/decoder module and servo PCB
The disc reading laser pickup is mounted in a motor driven slot loader, which receives its operating commands via the servo PCB. The heart of the servo PCB is the CD decoder Integrated Circuit IC401. This is controlled by software running on the main board micro controller IC701 via an I2C Bus. The microcontroller sends high level commands (e.g. Read TOC, Play track 1) to the servo PCB via a communication bus. Disc loading is controlled by the microcontroller on the servo PCB.
When a disc is inserted into the player the first thing that needs to happen is that the Table of Contents (TOC) of the disc is read. This information contains the start and end location of each track on the disc for disc navigation purposes. In order to read the TOC the laser is switched on by the decoder IC, and a focus ramp is initiated. If focus is found then the disc motor is switched on for a short time, then the PLL is switched on and the disc is accelerated to full speed. Once the speed had been achieved and the PLL is locked onto the data, the radial loop is switched on and the subcode will be read from the disc and fed to the decoder. The focus and radial positions of the laser spot are controlled by the decoder by looking at the diode signals coming from the optical pick up (OPU). These are D1,D2, D3 and D4 for focus, R1 and R2 for radial. The error signal from these diodes is used to generate a PDM signal. This signal is then filtered with a low pass filter and amplified by the motor driver (BA5984FP) to move the actuators. Power for the laser diode is supplied directly from the decoder IC which monitors laser output and adjusts the power accordingly. There is a single system clock on the servo board, 8.4672MHz. This is self‐generated by the decoder IC.
There are 2 main power supplies to the servo board, +5V_CD for the signal processing electronics and +5V_MOTOR to IC402 supplying motor and sled power. The +5V_CD supply is sub regulated to +3V3 and sub‐sub‐regulated to +1.8V on‐board for the decoder and other electronics.
TECHNICAL DESCRIPTION
© Cyrus Audio Ltd Aug 2014 7 CD Xt Signature Service Manual Issue 1
Microprocessor control system
System control is provided by microcontroller IC701 on the main PCB. The microcontroller accepts external user commands (IR handset, front panel keys and MC‐BUS loop) and translates them into instructions that operate the CD mechanism, via commands sent to the servo PCB.
The microcontroller communicates with the decoder on the servo PCB via the CD_CL and CD_DA lines.
Digital Outputs
The audio data from the servo PCB is fed to the main PCB as three digital signals DATA, WS and BCK in the cable assembly CON701 (the SPDIF signal is not used in this application). The data is then buffered by IC601 on the main PCB. The data signals are then re‐clocked and re‐formatted by IC602 and IC603.
An ultra‐stable audio master clock (XCLK) is generated by the PLL/VCO circuit IC605/XTAL601/IC606, synchronised to the BCK signal from the servo PCB. This master clock is routed to the data re‐clocking and re‐formatting circuits. The master clock and re‐formatted data are supplied to the audio output encoder IC402 which generates a digital audio SPDIF signal.
The SPDIF data is fed via buffer IC604 to the optical output (TOTX401) and to the RCA coaxial output (via digital transformer L402). Power supplies
The internal regulated power supplies for the disc playing and digital sections are derived from a switching power supply on the main PCB. This has two separate outputs, +5V and +10V. The 10V supply drives the display backlight via a switchable current source T702/T706/T707. The 5V supply drives the signal processing parts of the circuit. A separate linear power supply provides a power supply for the motors on the disc playing mechanism and a separate power supply for the PLL. A toroidal power transformer, mounted on the chassis provides a.c. power directly to the main PCB which is then rectified, smoothed and regulated by VR801 for the PLL and a discrete regulator based around T803 for the motor stages. Standby power control for the power transformer is provided by relay RLY801 on the main PCB. Front panel display
The front panel display is a backlit LCD module mounted in a moulding behind the front panel. The LCD module is driven by signals from microcontroller IC701 pins 37 and 38 (DISP_DATA and DISP_SCLK). IC701 also reads back an analogue voltage encoded from keys pressed on the front panel (via KEYS_IN1 pin 7), and remote control information from the eye via line RC5_IN pin 32.
FAULT FINDING/DISASSEMBLY
© Cyrus Audio Ltd Aug 2014 8 CD Xt Signature Service Manual Issue 1
CAUTION! LIVE MAINS VOLTAGES!
When undertaking any repair work on the CD player, engineers should note that the player includes a switching power supply connected directly to live mains and other high voltages, located on the main PCB. Capacitors in the power supply will retain very high DC voltages, even when disconnected from the mains. Exercise extreme care when removing or handling the main PCB.
Switching power supply repair
If a power supply fault is suspected, check the voltage of the 5V and 10V power supplies on the main PCB. These can be found at the SMD electrolytic capacitors C506 and C507. If either or both of these power supplies is missing, there may be a power supply fault or a short‐circuit to the power supply in question.
The primary side of the power supply can only be tested with an isolated DVM when the main PCB is installed correctly in the chassis. Never connect power to the main PCB when it has been removed from the chassis or use any grounded test equipment such as oscilloscopes to check for primary faults.
Initially, check the DC supply voltage across the '+' and '‐' pins of D501. The voltage found will depend on the mains voltage, but will be between 300‐350V. If this voltage is not present, disconnect mains power and check the miniature fuse FS801. If the fuse is OK, remove the PCB and check the primary components with a DVM resistance meter.
If the DC supply voltage is present and the power supply is not running, check the voltage between pins 1 and 8 of IC501. This is about 0.9V in normal operation. If this voltage is low, check R501. Check also the bias supply between pins 2 and 8 of IC501. This should be around 6V, but will only be present if the switching supply is switching correctly. If the supply is not switching, suspect a problem with IC501 or TX501. TX501 can be checked with a DVM set for resistance.
The secondary supplies are simple rectified supplies. The 'FEEDBACK' line provides close regulation for the +5V supply while the +10V supply may vary a little in voltage. If the +5V supply is not accurately set, this is most likely a component fault in IC502 or the network of components around it.
Linear power supply repair
The linear power supply is located on the main PCB and is of conventional design. First check that the secondary a.c. voltage is present from the power transformer. If this is missing, check if the power switch relay RL801 is switching on. The relay is located on the main PCB, driven by T804. If the secondary voltage is present, the power supplies can be traced through the rectifiers and regulators on the main PCB.
FAULT FINDING/DISASSEMBLY
© Cyrus Audio Ltd Aug 2014 9 CD Xt Signature Service Manual Issue 1
Disc will not read
If the disc will not read, check to see if the disc is rotating. If the disc is rotating then it means that the laser has focussed on the disc, therefore all power supplies are ok. If the disc does not rotate then check the power supplies to the servo PCB at pins +5V_MOTOR and +5V_CD on connector CON405 of the servo PCB. If the power supplies are working correctly, remove the loader and substitute the laser pickup with a new replacement unit. If the disc will still not read, substitute with a new servo PCB.
CAUTION! When disconnecting the flexfoil cable from the laser pickup to the servo PCB, always ensure that static precautions are taken with a grounded static mat and wrist‐strap as the laser pickup can easily be damaged by relatively low levels of static. When the disc reading mechanism or laser pickup are removed from the chassis, it is preferable to fit a flexfoil and use a metal paper clip or similar to bridge all open connections as static protection when handling the pickup.
Removing the loading mechanism with laser pickup
Disconnect mains power.
Disconnect the flexfoil from CON405 on the servo PCB.
Remove the two screws securing the mounting cradle to the chassis.
Slide the loader and cradle back in the chassis to disengage the front, then lift the complete assembly from the chassis.
Removing the cradle
Once the PCB has been removed, the cradle can be separated from the loader after removing the two self‐locking nuts.
Removing the servo PCB
In a static safe environment, disconnect the flex foil from CON401 on the servo PCB. Use a metal paper clip to short the exposed end of the flex‐foil and protect from static damage. Disconnect the cable plugs from CON402, CON403 and CON404. The PCB securing screws can now be removed and the servo PCB lifted clear.
FAULT FINDING/DISASSEMBLY
© Cyrus Audio Ltd Aug 2014 10 CD Xt Signature Service Manual Issue 1
Replacing the loading mechanism with laser pickup
Replacement is generally a reversal of removal, but note the following important steps ‐
Once the servo PCB has been fitted and the flexfoil cable from the laser pickup connected to CON401, the solder‐short that protects the pickup from static must be removed. This is accessible through the window on top of the loader as shown.
Removal of the solder‐short static protection:
Once the solder‐short is removed, the loader can be fitted to the cradle and then to the chassis.
Digital output faults
The digital output drive circuits are relatively straightforward. If the disc is playing, check the presence of the digital output signal from the DOBM pin of CON405 on the servo PCB. This signal should then appear on the main PCB at IC601, then IC604 before passing through L402 to the digital outputs.
Removing the front panel PCB
If a fault is diagnosed which requires the removal of the front panel PCB, proceed as follows. First, following the instructions above, remove the loading mechanism. Now disconnect the flexfoil running to the front panel PCB. Finally, the complete front panel assembly including display PCB may now be pressed forward out of the front of the chassis. Remove the fixing screws and the front panel PCB may now be lifted off the front panel assembly. The only part available for service of this PCB is the remote eye. If there are other faults with this PCB it will be necessary to replace the PCB assembly.
FLASH SOFTWARE
© Cyrus Audio Ltd Aug 2014 11 CD Xt Signature Service Manual Issue 1
Flash Software Overview
The CD players feature upgradeable software for the control system. The main PCB includes a microcontroller with internal memory that includes the software.
The microcontroller is labelled during the manufacturing process to show which software version is installed. If the software version is revised at some point this indication should be clearly deleted with a cross marked on the device label. The most reliable method to check the software version (without dismantling the player) is to read it from the display as follows ‐
1. Connect power to the unit and set to Standby (power light red). 2. Press and hold the Standby key. 3. The software version will be shown on the display.
Re‐programming
NOTE: Product software must never be replaced with an earlier version than already installed.
The CD players are programmed by connecting a USB cable directly from the main PCB to a computer. The location of the programming connector on the control PCB is arrowed in the picture on the right.
CAUTION: Ensure you have a new firmware file to hand before starting the process. Never disconnect the cable until the new software is installed. 1. Disconnect the mains from the product. 2. Locate SW702, a microswitch next to the USB connector
shown in the drawing. 3. Press and hold SW702. 4. Connect a mini‐USB cable to a free USB port on a computer. 5. Connect the mini‐USB cable to the socket on the main PCB. 6. The Red LED on the main PCB will light to indicate that USB
power is available. 7. Release SW702. 8. A new window will pop up on the PC which will show the
current firmware.bin file. 9. Delete the existing firmware.bin file. 10. Copy the new firmware.bin file supplied by Cyrus to this
folder. 11. Once the file has been copied remove the USB cable. 12. Power up and check the new software version as described
above.
MC‐BUS SYSTEM
© Cyrus Audio Ltd Aug 2014 12 CD Xt Signature Service Manual Issue 1
The MC‐BUS system
MC‐BUS is a system which provides communication between the control systems of a number of Cyrus products. The communication takes the form of a serial data stream which is sent from a 'master' product and received and repeated by 'slave' products. The data is thus passed from one product to another around a loop. The master product should then receive the message back which confirms that loop connections have been correctly made. The CD player is a 'slave' product and listens for 'CD' commands from the master product in the loop (usually an amplifier or surround decoder). MC‐BUS internal signal routing
MC‐BUS control is provided by the system microcontroller IC701. The signals are buffered into and out of this IC as shown in the diagram, The resistor bias at the MC‐BUS input ensures that the line idles high (+5V) if no MC‐BUS connection is made to another product.
MC‐BUS system tests
The MC‐BUS system can be tested by connecting the CD player into a known working Cyrus system. Note that MC‐BUS must be connected as a closed loop as shown in the diagram below. It is also important to connect the audio signal cables between components to provide an adequate ground return path for the MC‐BUS signals. Switch on the power to the system and set all components to Standby. Selecting the CD input on the amplifier or switching on a surround decoder will now activate the CD player. When the amplifier is set to Standby, all other components connected to the MC‐BUS loop will also set to Standby.
CD player
Amplifier
MC‐Bus output
MC‐Bus output
MC‐Bus input
MC‐Bus input
IC401F
+5V
IC401E
IC401A
IC401B
IC701
MCBus out
MCBus in
49
50
CHASSIS PARTS DRAWING
© Cyrus Audio Ltd Aug 2014 13 CD Xt Signature Service Manual Issue 1
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a c
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g
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e
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1$
1^
d
1%h
b
CHASSIS PARTS DRAWING
© Cyrus Audio Ltd Aug 2014 14 CD Xt Signature Service Manual Issue 1
Main chassis
Ref Part number Description
1 I2‐BACKP/T Rear panel
2 AM‐FCORE/DXP Ferrite filter small
3 AM‐MTERM/ AC power inlet
4 I2‐CBPOW/080 Power cable 80mm
5 I2‐INSUL/ PCB insulator
6 DS‐PCLIP/ Cable clip
7 I2‐M6X40/ Transformer bolt and nut
DX‐M6WAS/ M6 star washer
8 DX‐MLFLT/ Ferrite filter large
9* I6‐CB12W/200 Flex foil cable 12 way 200mm long
10 I6‐TX230/ Power transformer
11 I2‐LOADR/ASY ASA CD mechanism including servo PCB
12 AM‐COVER/BR
AM‐COVER/S1
Chassis ‐ black
Chassis ‐ silver
13 I2‐CB25W/170 Flex foil cable 25 way 170mm long
14 I2‐CRADL/ Mechanism mounting cradle SE players
15 D1‐H6238/B Clip on heatsink
16 I2‐MBSTD/XT Main PCB assembly
* Located under the power transformer and loader
FRONT PANEL PARTS DRAWING
© Cyrus Audio Ltd Aug 2014 15 CD Xt Signature Service Manual Issue 1
17 59:57
i1)
a b c de hfg
Front Panel parts
1 AM‐POWCP/ Standby knob trim
2 AM‐PLENS/02 Power lens
3 AM‐LENSM/02 Remote eye lens
4 CD‐DISPW/ Display window
5 I6‐MBDIS/02 Display PCB
6 CD‐FACSE/B CD‐FACSE/S
Front facia black Front facia silver
7 I2‐FRONT/ I2‐FRONT/S
Technical Moulding black Technical Moulding silver
8 I2‐BEZEL/ CD slot trim
9 AM‐BPPLT/V0 Base plate
10 AM‐BFOOT/ Rubber foot
MAIN PCB PART LIST
© Cyrus Audio Ltd Aug 2014 16 CD Xt Signature Service Manual Issue 1
RESISTORS R401 SMD0603 47k TF 1/10W 1%
R402 SMD0603 47k TF 1/10W 1%
R403 SMD0603 150R TF 1/10W 1%
R404 SMD0603 150R TF 1/10W 1%
R405 SMD0603 160R TF 1/10W 1%
R406 SMD0603 47R TF 1/10W 1%
R407 SMD0603 75R TF 1/10W 1%
R408 SMD0603 47k TF 1/10W 1%
R501 AXIAL0.5 3.9M MF 0.6W 1%
R502 SMD1206 22k TF 1/4W 1%
R503 SMD0603 1k TF 1/10W 1%
R504 SMD1206 39R TF 1/4W 1%
R505 AXIAL0.5 120R MF 0.6W 1%
R506 AXIAL0.5 120R MF 0.6W 1%
R507 SMD0603 560R TF 1/10W 1%
R508 SMD0603 10k TF 1/10W 1%
R509 SMD0603 10k TF 1/10W 1%
R511 SMD0603 130R TF 1/10W 1%
R512 SMD0603 18R TF 1/10W 1%
R602 SMD0603 47k TF 1/10W 1%
R603 SMD0603 Not fitted
R604 SMD0603 Not fitted
R605 SMD0603 100R TF 1/10W 1%
R606 SMD0603 100R TF 1/10W 1%
R607 SMD0603 100R TF 1/10W 1%
R608 SMD0603 Not fitted
R609 SMD0603 91R TF 1/10W 1%
R610 SMD0603 120R TF 1/10W 1%
R611 SMD0603 0R TF 1/10W 5%
R612 SMD0603 Not fitted
R613 SMD0603 47k TF 1/10W 1%
R615 SMD0603 Not fitted
R619 SMD0603 Not fitted
R620 SMD0603 Not fitted
R621 SMD0603 Not fitted
R622 SMD0603 Not fitted
R623 SMD0603 Not fitted
R624 SMD0603 Not fitted
R701 SMD0603 1k TF 1/10W 1%
R702 SMD0603 1k TF 1/10W 1%
R703 SMD0603 1k TF 1/10W 1%
R704 SMD0603 120R BLM18SG121TN1D Not fitted
R705 SMD0603 47k TF 1/10W 1%
R706 SMD0603 47k TF 1/10W 1%
R707 SMD0603 47k TF 1/10W 1%
R708 SMD0603 47k TF 1/10W 1%
R709 SMD0603 Not fitted
R710 SMD0603 Not fitted
R711 SMD0603 10R TF 1/10W 1%
R712 SMD0603 5R6 TF 1/10W 1%
R713 SMD0603 1R0 TF 1/10W 1%
MAIN PCB PART LIST
© Cyrus Audio Ltd Aug 2014 17 CD Xt Signature Service Manual Issue 1
R714 SMD0603 1k5 TF 1/10W 1%
R715 SMD0603 100k TF 1/10W 1%
R716 SMD0603 47R TF 1/10W 1%
R717 SMD0603 47R TF 1/10W 1%
R718 SMD0603 10k TF 1/10W 1%
R719 SMD0603 0R TF 1/10W 5%
R720 SMD0603 Not fitted
R802 SMD0603 10k TF 1/10W 1%
R804 SMD0603 110R TF 1/10W 1%
R805 SMD0603 330R TF 1/10W 1%
R811 SMD0603 330R TF 1/10W 1%
R813 SMD0603 47k TF 1/10W 1%
R814 SMD0603 100k TF 1/10W 1%
RP401 SAD CAY16 100R TF 1/16W 5%
RP402 SAD CAY16 1k TF 1/16W 5%
RP601 SAD CAY16 100R TF 1/16W 5%
RP603 SAD CAY16 100R TF 1/16W 5%
RP605 SAD CAY16 100k TF 1/16W 5%
RP609 SAD CAY16 100R TF 1/16W 5%
RP701 SAD CAY16 100R TF 1/16W 5%
RP702 SAD CAY16 Not fitted
RP704 SAD CAY16 10k TF 1/16W 5%
RP705 SAD CAY16 100R TF 1/16W 5%
RP706 SAD CAY16 Not fitted
CAPACITORS C401 SMD0603 47p CP 50V 5%
C402 SMD0603 Not fitted
C403 SMD0603 22n CP 25V 10%
C404 SMD0603 22n CP 25V 10%
C405 SMD0603 22p CP 50V 5%
C406 SMD0603 22p CP 50V 5%
C407 SMD0603 Not fitted
C409 SMD0603 1n CP 50V 5%
C413 SMD0603 1u CP 16V 10%
C414 SMD0603 100pF CP 50V 5%
C415 SMD0603 100n CP 25V 10%
C416 SMD0603 1n CP 50V 5%
C417 SMD0603 100n CP 25V 10%
C501 RB.2/.5 10uF EL 450V 20%
C502 RB.2/.5 22uF EL 400V 20%
C503 RAD0.3/RAD0.4 100pF Y1 CAP Y1 250V 10% May be 100pF or 2.2nF. Use 100pF for replacement.
C504 RB.2/.4 1200uF EL 16V 20%
C505 RB.2/.4 1200uF EL 16V 20%
C506 CAPSMD6.3 100uF EL 25V 20%
C507 CAPSMD6.3 220uF EL 16V 20%
C508 RB.2/.2 1uF EL 50V 20%
C509 RB.2/.2 1uF EL 50V 20%
C510 RAD0.2/RAD0.3 100n CP 630V 10%
C511 SMD0603 100n CP 25V 10%
C512 SMD0603 100n CP 25V 10%
C513 SMD0603 560p CP 50V 5%
MAIN PCB PART LIST
© Cyrus Audio Ltd Aug 2014 18 CD Xt Signature Service Manual Issue 1
C514 SMD0603 82p CP 50V 5%
C516 RAD0.4 10n PP 1kV 5%
C517 SMD0603 100n CP 25V 10%
C601 SMD0603 22n CP 25V 10%
C602 SMD0603 22n CP 25V 10%
C603 SMD0603 22n CP 25V 10%
C604 SMD0603 Not fitted
C605 SMD0603 22n CP 25V 10%
C606 SMD0603 22n CP 25V 10%
C607 SMD0603 22n CP 25V 10%
C608 SMD0603 22n CP 25V 10%
C609 SMD0603 Not fitted
C610 SMD0603 1n CP 50V 5%
C611 CAPSMD5.0 100uF EL 6.3V 20%
C612 CAPSMD4.0 22uF EL 16V 20%
C613 RAD0.2 Not fitted
C614 SMD0603 Not fitted
C701 SMD0603 100n CP 25V 10%
C702 SMD0603 100n CP 25V 10%
C703 SMD0603 100p CP 50V 5%
C704 SMD0603 22n CP 25V 10%
C705 SMD0603 22n CP 25V 10%
C706 SMD0603 22n CP 25V 10%
C707 SMD0603 22n CP 25V 10%
C708 SMD0603 22n CP 25V 10%
C709 SMD0603 22n CP 25V 10%
C710 SMD0603 22n CP 25V 10%
C711 SMD0603 22n CP 25V 10%
C712 SMD0603 1u CP 16V 10%
C713 SMD0603 100n CP 25V 10%
C714 SMD0603 100n CP 25V 10%
C716 SMD0603 15p CP 50V 5%
C717 SMD0603 15p CP 50V 5%
C718 SMD0603 100n CP 25V 10%
C802 RB.2/.5 2200uF EL 10V 20%
C803 SMD0805 100n CP 50V 10%
C804 SMD0805 100n CP 50V 10%
C805 SMD0805 100n CP 50V 10%
C806 SMD0603 22n CP 25V 10%
C807 SMD0603 22n CP 25V 10%
C808 SMD0603 22n CP 25V 10%
C809 SMD0603 22n CP 25V 10%
C810 SMD0603 22n CP 25V 10%
C811 SMD0603 22n CP 25V 10%
C812 SMD0603 22n CP 25V 10%
C813 SMD0603 22n CP 25V 10%
C814 SMD0603 22n CP 25V 10%
C818 SMD0603 22n CP 25V 10%
C819 SMD0603 22n CP 25V 10%
C820 RAD0.8 100n X CAP X2 250V 20%
C823 CAPSMD4.0 22uF EL 16V 20%
C824 RB.3/.6 4700uF EL 16V 20%
C825 CAPSMD4.0 22uF EL 16V 20%
C826 CAPSMD4.0 22uF EL 16V 20%
MAIN PCB PART LIST
© Cyrus Audio Ltd Aug 2014 19 CD Xt Signature Service Manual Issue 1
C828 SMD0603 22n CP 25V 10%
C829 SMD0603 22n CP 25V 10%
C830 CAPSMD4.0 22uF EL 16V 20%
CP701 SAD 0612‐4 10n CP 25V 10%
CP702 SAD 0612‐4 100pF CP 100V 10%
CP703 SAD 0612‐4 100pF CP 100V 10%
CP704 SAD 0612‐4 100pF CP 100V 10%
Key: CP = ceramic plate. EL = electrolytic. PE = polyester. PP = polypropylene. BP = bi‐polar. CAPSMD6.3 refers to surface mount device with 6.3mm pitch pads SMD‐0805 refers to surface mount device size code 0805
DIODES D401 SOT‐23 BAS16 Signal diode
D402 SOT‐23 BAS16 Signal diode
D501 DIODEBR2‐SM DF04S‐E3 1A bridge rectifier
D502 DIODE0.5 P6KE200A Transient voltage suppressor
D503 DIODE0.5 1N4935 Fast recovery diode
D504 SOT‐23 DA3X108K0L Signal diode Change to DA3X108K0L from BAS16
D505 SMC SSC54‐E3/57T Rectifier
D506 SMC SS35‐E3/57T Rectifier
D507 SOT‐23 TL432ASA‐7 Adjustable zener diode
D701 SOT‐23 KM‐23HD Red LED
D803 SOT‐23 BZX84‐C6V8 Zener diode
D804 DIODEBR2‐SM DF04S‐E3 1A Bridge rectifier
D805 PSM 1SR154‐400 Rectifier
D806 SOT‐23 BAS16 Signal diode
TRANSISTORS T701 SOT‐23 DRC2113Z0L Signal transistor
T702 SOT‐23 DRC2113Z0L Signal transistor
T703 SOT‐23 DRC2143T0L Signal transistor
T704 SOT‐23 DRA2114Y0L Signal transistor
T705 SOT‐23 DRA2114Y0L Signal transistor
T706 SOT‐23 BC807‐25, 215 Signal transistor
T707 DPAK1 MJD32CT4G Power transistor SMD
T801 SC‐74‐2 IMZ1A Dual signal transistor
T803 TO‐220H2 TIP31CG Power transistor
T804 SOT‐23 DRC2113Z0L Signal transistor
T805 SOT‐23 DRC2113Z0L Signal transistor
FET701 SOT‐23 IRLML6401TRPbF P channel power MOSFET
FET702 SOT‐23 IRLML6401TRPbF P channel power MOSFET
INTEGRATED CIRCUITS IC401 TSSOP14 CD74HCT14PWR Hex inverter
IC402 VSOP24 AK4103AVFP Digital output encoder
IC501 DIP‐8C TNY377PN SWMPSU driver
IC502 SO‐4 SFH6206‐2 Opto coupler
IC601 SO‐14 CD74HCT86M Quad XOR
IC602 TSSOP20 SN74HC574PWT Octal latch
MAIN PCB PART LIST
© Cyrus Audio Ltd Aug 2014 20 CD Xt Signature Service Manual Issue 1
IC603 TSSOP14 SN74HC74PWT Dual D type flip‐flop
IC604 TSSOP14 CD74HCT14PWR Hex inverter
IC605 SO‐16 CD74HC4046AM PLL and VCO
IC606 TSSOP16 SN74HC161 Synchronous binary counter
IC701 LQFP80 LPC1752FBD80, 551 Microcontroller
VOLTAGE REGULATORS VR801 SOT223 LM1117MPX‐ADJ Adjustable voltage regulator
VR802 SOT223 LM1117MPX‐3.3 800mA voltage regulator
FILTERS, INDUCTORS & CRYSTALS L402 COIL_SMD_8x6 750050480 Pulse transformer
L501 COIL‐ELF15 B82731M2132A030 6.8mH 1.3A
L502 SMDLH 4.7uH SMD inductor
L503 SMDLH 4.7uH SMD inductor
L601 SMD1210 Not fitted
L602 SMD1210 1uH SMD inductor
X701 XTAL_GSX‐333 12.000MHz GSX‐333 (MA07943)
Crystal
XTAL601 XTAL‐SMD6 33.8688MHz GVXO‐55 (MP04886)
VCXO module
CONNECTORS & SOCKETS CON601 CONLIF16T‐SM 52808‐1670 Not fitted
CON701 CONLIF25T‐SM 52808‐2570 25 way LIF connector
CON702 HEADER Not fitted
CON703 SIL_6W Not fitted
CON704 CONLIF12S 00‐8370‐127‐000‐800+
12 way LIF connector
CON801 2.8mm QC TAB37800568 2.8mm QC tab
CON802 2.8mm QC TAB37800568 2.8mm QC tab
CON803 3 PIN KK HEADER 0010321031 3 pin header
CON804 CONMINIPWR6 39‐30‐1062 Connector for power TX
CON805 RAD0.1 TSW‐102‐23‐L‐S 2 pin header
SK401 PHONOSNGL Single phono
SK402 PHONODUAL 12HP070HSG Dual phono
SK701 CON‐USB‐67803 651005136421 Mini‐USB connector
OTHER PARTS FS801 FUSE_UMZ 3404.2416.11 Miniature fuse T1A
RLY801 RELAY_G5NB G5NB1AE5DC Power relay
SW701 TACT‐2‐RTANGLE Not fitted
SW702 TACT‐2‐RTANGLE KSS321G LFS Tact switch
TOTX401 TOX179 GP1FAV51TK0F Optical transmitter
TX501 TX‐EF20 094‐931 SMPS transformer
SERVO PCB PART LIST
© Cyrus Audio Ltd Aug 2014 21 CD Xt Signature Service Manual Issue 1
RESISTORS R401 SMD0603 220R TF 1/16W 1%
R402 SMD0603 750R TF 1/16W 1%
R403 SMD0603 10R TF 1/16W 1%
R404 SMD0603 10R TF 1/16W 1%
R405 SMD0603 100R TF 1/16W 1%
R406 SMD0603 100R TF 1/16W 1%
R407 SMD0603 10k TF 1/16W 1%
R408 SMD0603 47R TF 1/16W 1%
R409 SMD0603 100k TF 1/16W 1%
R410 SMD0603 24k TF 1/16W 1%
R411 SMD0603 22k TF 1/16W 1%
R412 SMD0603 3.6k TF 1/16W 1%
R413 SMD0603 30k TF 1/16W 1%
R414 SMD0603 3k6 TF 1/16W 1%
R415 SMD0603 4.7k TF 1/16W 1%
R416 SMD0603 30k TF 1/16W 1%
R417 SMD0603 4.7k TF 1/16W 1%
R418 SMD0603 4.7k TF 1/16W 1%
R419 SMD0603 120R BLM18SG121TN1D 0%
R420 SMD0603 4.7k TF 1/16W 1%
R421 SMD0603 22k TF 1/16W 1%
R422 SMD0603 22k TF 1/16W 1%
R423 SMD0603 1R0 TF 1/16W 1%
R424 SMD0603 Not fitted
R425 SMD0603 10k TF 1/16W 1%
R426 SMD0603 100R TF 1/16W 1%
R427 SMD0603 2k2 TF 1/16W 1%
R428 SMD0603 4.7k TF 1/16W 1%
R429 SMD0603 10k TF 1/16W 1%
R430 SMD0603 10k TF 1/16W 1%
R431 SMD0603 4.7k TF 1/16W 1%
R432 SMD0603 1R0 TF 1/16W 1%
R433 SMD0603 30k TF 1/16W 1%
R434 SMD0603 4.7k TF 1/16W 1%
R435 SMD0603 3.6k TF 1/16W 1%
R436 SMD0603 22k TF 1/16W 1%
R437 SMD0603 1R0 TF 1/16W 1%
R438 SMD0603 Not fitted
R439 SMD0603 Not fitted
R440 SMD0603 120R BLM18SG121TN1D 0%
R441 SMD0603 10k TF 1/16W 1%
R451 SMD0603 Not fitted
R452 SMD0603 100R TF 1/16W 1%
R459 SMD0603 Not fitted
R460 SMD0603 Not fitted
R461 SMD0603 Not fitted
R462 SMD0603 Not fitted
R463 SMD0603 Not fitted
R466 SMD0603 100k TF 1/16W 1%
R467 SMD0603 120R BLM18SG121TN1D 0%
R468 SMD0603 100k TF 1/16W 1%
SERVO PCB PART LIST
© Cyrus Audio Ltd Aug 2014 22 CD Xt Signature Service Manual Issue 1
RP401 SMD CAY16 100R TF 1/16W 5%
RP402 SMD CAY16 100R TF 1/16W 5%
RP403 SMD CAY16 100R TF 1/16W 5%
CAPACITORS C401 SMD0603 22n CP 25V 10%
C402 SMD0603 22n CP 25V 10%
C403 SMD0603 10n CP 25V 10%
C404 CAPSMD4.0 22uF EL 16V 20%
C405 SMD0603 22n CP 25V 10%
C406 SMD0603 100n CP 25V 10%
C407 SMD0603 100n CP 25V 10%
C408 SMD0603 100n CP 25V 10%
C409 SMD0603 1n5 CP 50V 5%
C410 CAPSMD4.0 22uF EL 16V 20%
C411 SMD0603 22n CP 25V 10%
C412 SMD0603 22n CP 25V 10%
C413 CAPSMD4.0 22uF EL 16V 20%
C414 SMD0603 47n CP 25V 10%
C415 CAPSMD4.0 22uF EL 16V 20%
C416 SMD0603 100n CP 25V 10%
C417 SMD0603 100n CP 25V 10%
C418 SMD0603 22n CP 25V 10%
C419 SMD0603 100n CP 25V 10%
C420 SMD0603 22n CP 25V 10%
C421 SMD0603 22n CP 25V 10%
C422 CAPSMD4.0 22uF EL 16V 20%
C423 SMD0603 33pF CP 50V 5%
C425 SMD0603 100n CP 25V 10%
C426 SMD0603 100n CP 25V 10%
C427 CAPSMD6.3 100uF EL 10V 20%
C428 SMD0603 100n CP 25V 10%
C430 SMD0603 22n CP 25V 10%
C431 CAPSMD6.3 100uF EL 10V 20%
C432 SMD0603 1n5 CP 50V 5%
C434 SMD0603 1n5 CP 50V 5%
C435 SMD0603 1n5 CP 50V 5%
C437 SMD0603 1n5 CP 50V 5%
C438 SMD0603 1n5 CP 50V 5%
C441 SMD0603 Not fitted
C446 SMD0603 33pF CP 50V 5%
C447 SMD0603 100n CP 25V 10%
C448 SMD0603 100n CP 25V 10%
Key: CP = ceramic plate. EL = electrolytic. PE = polyester. PP = polypropylene. BP = bi‐polar. CAPSMD6.3 refers to surface mount device with 6.3mm pitch pads SMD‐0805 refers to surface mount device size code 0805
DIODES D401 LED_5MM TSAL6200 Through Hole IR LED.
D402 LED_5MM TSAL6200 Through Hole IR LED.
D403 SOD‐123 1N4148W‐V‐GS08 small signal diode
D404 SOD‐123 1N4148W‐V‐GS08 small signal diode
D405 SOD‐123 1N4148W‐V‐GS08 small signal diode
SERVO PCB PART LIST
© Cyrus Audio Ltd Aug 2014 23 CD Xt Signature Service Manual Issue 1
D406 SOD‐123 1N4148W‐V‐GS08 small signal diode
TRANSISTORS T401 SOT23 BC817‐25 Signal Transistor
T402 SOT23 PDTB113ZT Digital transistor
T403 SC‐74‐2 IMX17T110 Dual NPN transistor
INTEGRATED CIRCUITS IC401 LQFP80 SAA7826HL/M1AS/S5 PhonIC CD decoder
IC402 HSOP28 BA5984FP‐E2 5 channel motor driver
VOLTAGE REGULATORS VR401 SOT223 LM1117MPX‐3.3 SMD +3v3 regulator.
FILTERS, INDUCTORS & CRYSTALS X401 GSX‐751 8.4672MHz MP04546
CONNECTORS & SOCKETS
CON401 CONZIF24‐SM_0.5MM
046240024006800+ 24 way LIF connector
CON402 CON4‐JST‐SMS S4B‐PH‐SM4‐TB(LF)(SN)
4 way SIL header
CON403 CON3‐JST‐SMS S3B‐PH‐SM4‐TB(LF)(SN)
3‐way SIL header
CON404 CON6‐JST‐SMS S6B‐PH‐SM4‐TB(LF)(SN)
6‐way SIL header
CON405 CONZIF25 52271‐2579 25 way ZIF connector
SK401 SKT_SMB Not fitted
TP414 PAD6.0x6.2 S1951‐46R Spring terminal
TP415 PAD6.0x6.2 S1951‐46R Spring terminal
CIRCUIT DIAGRAMS
© Cyrus Audio Ltd Aug 2014 24 CD Xt Signature Service Manual Issue 1
Circuit diagram index
The Cyrus CD Xt Signature circuit diagrams are listed below.
Main PCB Digital output and MC‐BUS .............................................. 25 Switching power supply and main PCB regulators........... 26 Master clock and data re‐formatting ............................... 27 Microcontroller ................................................................ 28 Servo PCB Decoder and sled drive..................................................... 29
GN
D1
VC
C2
INP
UT
3
TO
TX
401
TO
TX
179
DG
ND
C413
1u
16V
X7R
R405
160R
DG
ND
C401
47p
R403
150R
DG
ND
+5V
_S
W
C403
22n
DG
ND
SP
DIF
R406
47R
56
IC604C
74H
CT
14
13
12
IC604F
74H
CT
T14
98
IC604D
74H
CT
T14
1110
IC604E
74H
CT
T14
L402
CO
IL_750050480
D402
BA
S16
D401
BA
S16
MC
_IN
MC
_O
UT
C407
DN
F
C405
22p
C406
22p
DG
ND
+5V
CC
13
12
IC401F
74H
CT
14
R402
47k
56
IC401C
74H
CT
14
1110
IC401E
74H
CT
14
4
74H
CT
14D
GN
D
C409
1n
1 2
3
SK
402A
12H
P070H
SG
SK
402B
PH
ON
OD
UA
LG
ND
RP
402
1k
*4
R408
47k
+5V
CC
/CD
_S
TA
ND
BY
1
SK
401
T6612
R407
75R
C414
100pF
DG
ND
12
14 7
IC401A
74H
CT
14 9
8
IC401D
74H
CT
14
R401
47k
3
IC401B
+5V
CC
DG
ND
C404
22n
/ST
AN
DB
Y
ST
AN
DB
Y
MC
_B
US
_IN
MC
_B
US
_O
UT
RP
401
100R
*4
2 0
C416
1n
C415
100n
Digital output and MC-BUSMain PCB schematic diagram
25
V1
1
TRANS2
PDN 3
MCLK4
SD
AT
A5
BC
LK
6
WC
LK
7
FS
0/C
SN
/AK
MO
DE
8
FS
1/C
DT
I9
FS
2/C
CL
K10
FS
3/C
DT
O11
C1
12
ANS 13
BLS14
CKS015
CKS116
VDD17
GND18
TX
N19
TX
P20
DIF021
DIF122
DIF223
U1
24
Audio
Ser
ial
Inte
rfac
eP
resc
aler
Bip
has
eE
nco
der
CR
CG
ener
ator
Host
Ser
ial
Inte
rfac
e
Reg
iste
rM
UX
IC402
AK
4103
DG
ND
+5V
_S
W
C417
100n
+5V
_S
W
DG
ND
DG
ND
+5V
_S
W
IEC
958_W
CL
K
IEC
958_D
AT
A
IEC
958_B
CL
K
XC
LK
R404
150R
/ST
AN
DB
Y
CD Xt Signature service manual Issue 1© Cyrus Audio Ltd Aug 2014
AC
_L
IVE
AC
_N
EU
TR
AL
D501
DF
04S
14
23
L501
B82731M
2132A
030
EN
/UV
1
BP
/M2
D4 S 5
S 6
S 7
S 8
IC501
TN
Y377P
N
D502
P6K
E200A
D503
1N
4935
C509
1uF
/50V
R501
3.9
M
D506
SS
35
C505
1200uF
/16V
EE
UF
M1C
122L
B
L503
4.7
uH
C507
220uF
/16V
D505
SS
C54
C504
L502
4.7
uH
C506
100uF
/25V +
5V
CC
10V
D504
DA
3X
108K
0L
C508
1uF
/50V
EE
UF
C1H
1R
0
1 2
34
IC502
SF
H6206-2
R503
1k
RE
CT
IFIE
RE
MI
FIL
TE
RIN
PU
TC
APA
CIT
OR
CL
AM
PE
N/U
V R502
22k
BIA
S
DG
ND
DG
ND
C503
100p
Y1
CA
P
S
R504
39R
R505
120R
C510
100n
630V
R506
120R
C511
100n
C512
100n
C513
560p
C514
82p
R511
130R
R512
18R
EE
EF
PC
221X
AP
7440530047
7440530047
C516
MKP1840-M10n1kV
C501
10uF
/450V
C502
22uF
/400V
Pan
asonic
EE
Pan
asonic
EE
EE
UE
E2W
100
EE
UE
E2G
220
6 1
TX
501A
TR
AN
S_094931
43
TX
501B
TR
AN
S_094931
9 14
TX
501C
TR
AN
S_094931
7 12
TX
501D
TR
AN
S_094931
DG
ND
D507
TL
432
R507
560R
R508
10k
R509
10k
DG
ND
C517
100n
1200uF
16V
EE
UF
C1E
331
EE
EF
K1E
101X
P
DE
1E
3K
X101K
RE
PL
AC
EW
ITH
AP
PR
OV
ED
PAR
T
SA
FE
TY
CR
ITIC
AL
CO
MP
ON
EN
T
!!
I/P
O/P
G
VR
802
LM
1117M
P-3
.3
DG
ND
+5V
CC
C828
22n
C8
29
22
nC
83
022uF
/16V
3v3_uP
RO
C
Switching power supply & main PCB regulators
CD Xt Signature service manual Issue 1© Cyrus Audio Ltd Aug 2014
Main PCB schematic diagram
C808
22n
D803
6V
8C
80
72
2n
C8
23
22uF
/16V
DG
ND
DG
ND
HS
R802
10k
T8
03
TIP
31
D8
05
1S
R154-4
00
10V
DG
ND
DG
ND
R813
47k
ST
AN
DB
Y
R814
100k
T8
01
AIM
Z1A
T801B
IMZ
1A
T805
DR
C2113Z
C8
02
2200uF
/10V
+5V
_M
OT
OR
DG
ND
26
FS
801
FR
OM
MA
INS
123
CO
N803
CO
NH
EA
DE
R3
AC
_L
IVE
AC
_N
EU
TR
AL
Fuse
Rat
ing
230V
acT
1A
L
CON801
2.8MMQUICKCONNECT
CON802
2.8MMQUICKCONNECT
53
4RL
Y801A
RE
LA
Y_G
5N
B
C820
100nXCAP
22
66
RL
Y801B
RE
LA
Y_G
5N
B
+5V
CC
DG
ND
T804
DR
C2113Z
D8
06
BA
S16
/ST
AN
DB
Y
12
CO
N805
CO
NH
EA
DE
R2
Q803
MO
UN
TH
OL
E1
Q801
MO
UN
TH
OL
E1
Q802
MO
UN
TH
OL
E1
C819
22n
DG
NDC
818
22n
DG
ND
R811
330R
was
2.2
nY
1C
AP
DE
1E
3K
X222K
(
(
1 2 3
4 5 6
CO
N804
CO
NP
OW
ER
6
LV
B1
LV
B2
C803
100n
C8
04
10
0n
C8
05
10
0n
HV
B1
HV
B2C
TH
1
D804
DF
04S
C8
09
22
n
C8
10
22
n
C8
06
22
n
C8
13
22
n
LV
B1
LV
B2
DG
ND
C824
4700uF
/16V
DG
ND
I/P
O/P
G
VR
801
LM
1117A
R8
05
33
0R
R8
04
11
0R
C8
26
22uF
/16V
C811
22n
C8
14
22
n
C8
12
22
nC
82
522uF
/16V
DG
ND
DG
ND
DG
ND+
LV
B
!!
+5V
CC
_P
LL
DG
ND
CA
UT
ION
HIG
H
PA
RT
SV
OL
TA
GE
PC
Pout
1
PC
1out
2
COMPin3
VCOout4
INH 5C1a6
C1b7
GND 8
VCOin 9
DE
Mout
10
R1
11
R2
12
PC
2out
13
SIGin14
PC
3out
15
Vcc 16
IC605
74H
C4046
XC
LK
/8
XC
LK
DG
ND
+5V
CC
_P
LL
C610
1n
DG
ND
P3
6P
25
P1
4P
03
PE
9
CE
P7
CE
T10
CP
2
TC
15
MR
1
Q0
14
Q1
13
Q2
12
Q3
11
VCC16 GND 8
IC606
74H
C161
+5V
_S
W C605
22n
DG
ND
DG
ND
XC
LK
/8
XC
LK
=16.9
344M
Hz(
384fs
)
XC
LK
/8=
2.1
168M
Hz(
48fs
)
L602
1uH
R609
91R
R610
C611
100uF
/6.3
V
DG
ND
C607
22n
+5V
CC
_P
LL
DG
ND
C612
22uF
/16V
C606
22n
BC
LK
Vco
ntr
ol
1
Enab
le2
GND 3
Outp
ut
4
n.c
5
Vcc6
XT
AL
601
33.8
688M
Hz
/ST
AN
DB
Y
R602
47k
+5V
CC
_P
LL
120R
R605
100R
R606
100R
R607
100R
12
14 7
IC604A
74H
CT
14
34
IC604B
74H
CT
14
+5V
_S
WC
608
22n
DG
ND
DG
ND
CL
K3
PRE4 CLR 1
D2
Q5
Q6
VD
D14
IC603A
74H
C74
CL
K11
PRE10 CLR 13
D12
Q9
Q8
GN
D7
IC603B
74H
C74
+5V
_S
W
C603
22n
DG
ND
DG
ND
/BC
LK
BC
LK
/WC
LK
LE
FT
JUS
T_W
CL
K
+5V
_S
W+
5V
_S
W
+5V
_S
W
/WC
LK
WC
LK
RP
609A
100R
*4
RP
609B
100R
*4
RP
609C
100R
*4
RP
609D
100R
*4
R611
0R
DG
ND
1 23
14 7
IC601A
74H
CT
86
9
10
8
IC601C
74H
CT
86
4 56
IC601B
74H
CT
86
12
13
11
IC601D
74H
CT
86
DG
ND
PH
AS
E
DA
TA
_C
D
WC
LK
_C
D
SC
LK
_C
D
RP
601
100R
*4
D0
2Q
019
D1
3Q
118
D2
4Q
217
D3
5Q
316
D4
6Q
415
D5
7Q
514
D6
8Q
613
D7
9Q
712
OE
1
CP
11
GND 10VCC20
IC602
74H
C574
RP
605
100k
*4
DG
ND
XC
LK
+5V
_S
W
+5
V_
SW
C601
22n
DG
ND
C602
22n
DG
ND
DG
ND
CD
_S
PD
IF
DG
ND
BC
LK
R613
47k
DG
ND
DG
ND
RP
603
47R
*4
IEC
958_B
CL
K
IEC
958_D
AT
A
IEC
958_W
CL
KL
EF
TJU
ST
_W
CL
K
WC
LK
DA
C_W
CL
K
PH
AS
Ed
ata
inversio
n:
0=
norm
al
1=
In
verte
d
Master clock and data reformattingMain PCB schematic diagram
27 CD Xt Signature service manual Issue 1© Cyrus Audio Ltd Aug 2014
DG
ND
+5
VC
CV
AD
C
To
Fron
tP
an
el
PC
B
KE
YS
_IN
1
LE
D_R
ED
LE
D_G
RN
+V
BA
CK
LIG
HT
RC
5_IN
DIS
P_S
CL
KD
ISP
_D
AT
A
CO
N704
12
Way
LIF
Sid
eE
ntr
y1.2
5m
mP
it
LC
D_/C
SL
CD
_A
0
R715
100k
C7
17
15
p
C7
16
15
pD
GN
D
T706
BC
807
R7
12
5R
6
R7
18
10
k
R7
03
1k
C7
18
10
0n +V
BA
CK
LIG
HT
BA
CK
LIG
HT
_O
N10V
DG
ND
T705
DR
A211
4Y
T7
04
DR
A2
11
4Y
+5V
CC
+5
VC
C
GR
N_
LE
D_
ON
RE
D_
LE
D_
ON
LE
D_G
RN
LE
D_R
ED
100m
A
T707
MJD
32C
R7
11
10
RC
71
21
u1
6V
X7
R
3v3_uP
RO
C
DG
ND
C704
22n
3v3_uP
RO
C
DG
ND
C705
22n
3v3_uP
RO
C
DG
ND
PIN
67
PIN
56
PIN
42C
706
22n
3v3_uP
RO
C
DG
ND
/uP
RO
C_R
ES
ET
CD
_C
L
CD
_D
A
C711
22n
RC
5_IN
LC
D_A
0
LC
D_
/CS
CD
_D
ISC
_D
ET
EC
T1
CD
_T
RA
Y+
CD
_T
RA
Y-
/MU
TE
KE
YS
_IN
1
CD
TX
T_D
AT
CD
TX
T_C
LK
CD
TX
T_R
DY
BA
CK
LIG
HT
_O
N
R705
47k
/RE
SE
T_O
UT
RE
D_L
ED
_O
N
GR
N_
LE
D_
ON
JTA
G_
TC
LK
R706
47k
3v3_uP
RO
C
DIS
P_D
AT
A
CD
_D
ISC
_D
ET
EC
T2
JTA
G_
TR
ST
VA
DC
TD
O/S
WO
1
TD
I2
TM
S/S
WD
IO3
TR
ST
4
TC
K/S
WD
CL
K5
P0(2
6)/
AD
0(3
)/R
XD
36
P0(2
5)/
AD
0(2
)/I2
SR
X_S
DA
/TX
D3
7
Vdd(a
)8
Vss
(a)
9
VR
EF
P10
RS
TO
UT
11
VR
EF
N12
RT
CX
113
RE
SE
T14
RT
CX
215
VB
AT
16
P1(3
1)/
SC
K1/A
D0(5
)17
P1(3
0)/
Vbus/
AD
0(4
)18
XT
AL
119
XT
AL
220
Vdd(3v3) 21
P0(29)/USB_D+ 22
P0(30)/USB_D- 23
Vss 24
P1(18)/USB_UP_LED/PWM1(1)/CAP1(0) 25
P1(19)/MCOA0/USB_PPWR/CAP1(1) 26
P1(20)/MCI0/PWM1(2)/SCK0 27
P1(22)/MCOB0/USB_PWRD/MAT1(0) 28
P1(23)/MCOB0/USB_PWRD/MAT1(0) 29
P1(24)/MCI2/PWM1(5)/MOSI0 30
P1(25)/MCOA1/MAT1(1) 31
P1(26)/MCOB1/PWM1(6)/CAP0(0) 32
Vss 33
Vdd(reg3v3) 34
P1(28)/MCOA2/PCAP1(0)/MAT0(0) 35
P1(29)/MCOB2/PCAP1(1)/MAT0(1) 36
P0(0)/RD1/TXD3/SDA1 37
P0(1)/TD1/RXD3/SCL1 38
P0(10)/TXD2/SDA2/MAT3(0) 39
P0(11)/RXD2/SCL2/MAT3(1) 40
P2(1
0)/
EIN
T0/N
MI
41
Vdd(3
v3)
42
Vss
43
P0(2
2)/
RT
S1/T
D1
44
P0(1
8)/
DC
D1/M
OS
I0/M
OS
I45
P0(1
7)/
CT
S1/M
ISO
0/M
ISO
46
P0(1
5)/
TX
D1/S
CK
0/S
CK
47
P0(1
6)/
RX
D1/S
SE
L0/S
SE
L48
P2(9
)/U
SB
_C
ON
NE
CT
/RX
D2
49
P2(8
)/T
D2/T
XD
250
P2(7
)/R
D2/R
TS
151
P2(6
)/P
CA
P1(0
)/R
I1/T
RA
CE
CL
K52
P2(5
)/P
WM
1(6
)/D
TR
1/T
RA
CE
DA
TA
(0)
53
P2(4
)/P
WM
1(5
)/D
SR
1/T
RA
CE
DA
TA
(1)
54
P2(3
)/P
WM
1(4
)/D
CD
1/T
RA
CE
DA
TA
(2)
55
Vdd(3
v3)
56
Vss
57
P2(2
)/P
WM
1(3
)/C
TS
1/T
RA
CE
DA
TA
(3)
58
P2(1
)/P
WM
1(2
)/R
XD
159
P2(0
)/P
WM
1(1
)/T
XD
160
P0(9)/I2STX_SDA/MOSI1/MAT2(3)61
P0(8)/I2STX_WS/MISO1/MAT2(2)62
P0(7)/I2STX_CLK/SCK1/MAT2(1)63
P0(6)/I2SRX_SDA/SSEL1/MAT2(0)64
P4(28)/RX_MCLK/MAT2(0)/TXD365
Vss66
Vdd(reg3v3)67
P4(29)/TX_MCLK/MAT2(1)/RXD368
P1(15)/ENET_REF_CLK69
P1(14)/ENET_RX_ER70
P1(10)/ENET_RXD171
P1(9)/ENET_RXD072
P1(8)/ENET_CRS73
P1(4)/ENET_TX_EN74
P1(1)/ENET_TXD175
P1(0)/ENET_TXD076
Vdd(3v3)77
Vss78
P0(2)/TXD0/AD0(7)79
P0(3)/RXD0/AD0(6)80
IC701
LP
C1752F
BD
80
ISP
_M
OD
E_
SE
T
UA
RT
0_T
X
UA
RT
0_
RX
JTA
G_
TM
S
JTA
G_
TD
I
JTA
G_
TD
O
SK
701
651005136421
R7
16
47
R
R7
17
47
R
VB
US
D-
D+
GN
D
DG
ND
VB
US
R714
1k5
Wurt
h
R713
1R
0
VB
US
D701
KM
-23H
D
3v3_uP
RO
C
DIS
P_S
CL
K
RP
705
100R
*4
RP
70
41
0k
*4
3v3_uP
RO
C
3v3_uP
RO
C
DG
ND
R707
47k
SW
70
2
SW
_T
AC
AL
PS
DG
ND
3v3_uP
RO
C
3v3_uP
RO
C
DG
ND
DG
ND
3v3_uP
RO
C
DG
ND
3v3_uP
RO
C
3v3_uP
RO
C
DG
ND
PIN
34
3v3_uP
RO
C
DG
ND
PIN
8C707
22n
3v3_uP
RO
C
DG
ND
3v3_uP
RO
C
DG
ND
3v3_uP
RO
C
DG
ND
C708
22n
PIN
77
C713
100n
DG
ND
X701
12.0
00M
/CD
_S
TA
ND
BY
VE
RS
ION
PH
AS
E
/RE
SE
T_
MA
IN
CO
N701
CO
NL
IF25
+5V
CC
DG
ND
CD
_S
PD
IF
CD
_T
RA
Y+
CD
_T
RA
Y-
IN_S
W/C
D_S
TA
ND
BY
/RE
SE
T_
OU
TC
D_
DA
CD
_C
L
CD
_D
ISC
_D
ET
EC
T1
CD
_D
ISC
_D
ET
EC
T2
CD
TX
T_
CL
KC
DT
XT
_D
AT
CD
TX
T_R
DY
SC
LK
_C
DW
CL
K_C
DD
AT
A_C
D
LE
D_
ON
Connec
tion
toC
Dsu
bP
CB
C701
100n
DG
ND
G
DS
FE
T701
IRL
ML
6401P
bF
R7
01
1k
T7
01
DR
C2
11
3Z
DG
ND
R704
BM
L18E
G121S
N1D
CP
70
11
0n
*4
CP
70
21
00
p*4
C7
09
22
nC
71
02
2n
T7
02
DR
C2
11
3Z
R7
19
0R
DG
ND
Ver
sio
n
CD
_P
OW
ER
_O
N
R708
47k
3v3_uP
RO
C
IN_S
W
RP
701
100R
*4
+5V
_M
OT
OR
C702
100n
DG
ND
LE
D_O
N
CD
_P
OW
ER
_O
N
MC
_B
US
_IN
MC
_B
US
_O
UT
G
DS
FE
T702
IRL
ML
6401P
bF R
70
2
1k
DG
ND
CD
_P
OW
ER
_O
N
T703
DR
C2143T
+5V
_S
W CP
703
100p
*4
CP
70
4
100p
*4
DG
ND
C703
100p
DG
ND
3v3_uP
RO
C
C714
100n
DG
ND
MicrocontrollerMain PCB schematic diagram
28 CD Xt Signature service manual Issue 1© Cyrus Audio Ltd Aug 2014
Vdda1
7
Vdda2
16
Vssa15
Vssa217
Vre
fo8
Iref
6
D19
D210
D311
D412
R113
R214
Vssa320
OS
CO
UT
18
OS
CIN
19
Vddd1 41
DA
CR
N23
DA
CL
P26
DA
CV
+27
DA
CR
P22
DA
CL
N25
DA
CV
ref
24
CS
LIC
E15
TE
ST
176
CL
16
49
DA
TA
46
WC
LK
47
SC
LK
48
EF
45
TE
ST
277
LKILL 34
Vssd1 40
V2 72
WC
LK
IN43
DA
TA
IN42
SC
LK
IN44
RE
SE
T51
SD
A52
SC
L53
RA
B54
SIL
D55
ST
AT
US
56
TE
ST
378
RC
K57
SU
B58
SF
SY
59
SB
SY
60
CL
4/1
250
Vssd2 61
DO
BM
62
Vddd3 70
CF
LG
39
RA
64
FO
65
SL
66
Vddd2 63
Vssd3 69
MO
TO
167
MO
TO
268
V4 74
V5 75
V1 71
LA
SE
R80
DC
OF
FS
ET
CO
MP
VO
LT
AG
EB
UF
FE
R
HF
&L
FC
AP
TU
RE
AN
TI
AL
IAS
CO
NT
RO
LF
UN
CT
ION
OU
TP
UT
ST
AG
ES
MIC
RO
INT
ER
FA
CE
CO
NT
RO
LPA
RT
MO
TO
RC
ON
TR
OL
ER
RO
RC
OR
RE
CT
OR
FL
AG
S
GE
N
BIA
S
TE
ST
TIM
ING
DE
CO
DE
R
MIC
RO
-
CO
NT
RO
LL
ER
INT
ER
FA
CE
DIG
ITA
L
PL
L
EF
M
DE
MO
DU
LA
TO
R
SR
AM
RA
M
AD
DR
ES
SE
R
SU
BC
OD
E
PR
OC
ES
SO
R
AU
DIO
PR
OC
ES
SO
R
EB
U
INT
ER
FA
CE
SE
RIA
L
DA
TA
INT
ER
FA
CE
SE
RIA
L
DA
TA
INT
ER
FA
CE
(LO
OP
BA
CK
)
PE
AK
DE
TE
CT
BIT
ST
RE
AM
DA
C
KIL
L
VE
RS
AT
ILE
PIN
SIN
TE
RFA
CE
RKILL 35
V3 73
DA
CG
ND
21
BU
FO
UT
R30
BU
FO
UT
L31
BU
FIN
R29
BU
FIN
L32
HE
AD
PH
ON
E
BUFGND 33
BUFV+ 28
TE
ST
479
CD
TE
XT
CD
TR
DY
36
CD
TD
AT
37
CD
TC
LK
38
DA
TA
SL
ICE
R
TH
RE
SH
OL
D
CO
NT
RO
L
HP
FIL
TE
R
DIS
CA
DC
D1
- D
4S
UM
MONITOR3
SENSE4
EXFILTER2
LPOWER1
IC401
SA
A7826
D1
D2
D3
D4
S1
S2
VC
OM
RF
_B
UF
F
CO
N401
CO
NL
IF24
FO
CU
S+
FO
CU
S-
RA
DIA
L+
RA
DIA
L-
SF
-HD
850
OP
Uas
sem
bly
F-
F+
T+
T-
C D CD
/DV
DS
WR
FA B F G
ND
-PD
Vc(
Vre
f)V
ccE n.c
.V
R-C
DV
R-D
VD
CD
-LD
MD
HF
Mn.c
.D
VD
-LD
GN
D-L
D
+5
V_
CD
C401
22n
HF
_G
ND
HF
_G
ND
San
yo
SF
-HD
850
det
ecto
rar
rangem
ent
CD
BA
E F
FE
=(A
+C
)-
(B+
D)
When
FE
min
us,
dis
cis
close
rth
anfo
cus
poin
t
EQ
SE
L0:
n=
11:
n=
2x:
n=
4
CD
RW
GA
IN0
=1
1=
4
R405
100R
R4
06
10
0R
LD
MO
N
LD
MO
N
R410
24k
C4
09
1n
5C
0G
C4
02
22
n
2.1
V
C425
100n
HF
IN'E
YE
PA
TT
ER
N'
0.6
5us
R466
100k
C4
46
33
pF
I2C
_S
CL
K
I2C
_D
AT
A
DG
ND3
v3_C
D
RA
FO
SL
MO
TO
1
MO
TO
2
ToDriverCircuitsSheet2
C403
10n
HF
_G
ND
R452
100R
C4
41
DN
F
DG
ND
DO
BM
CF
LG
R451
DN
F
R424
DN
F
3v3_C
D
1
2
3
4
5
SK
401
DN
F DG
ND
RP
401
100R
*4
SC
LK
_O
UT
WC
LK
_O
UT
DA
TA
_O
UT
EF
ST
401
ST
AR
2
HF
_G
ND
DG
ND
HO
ME
SW
ITC
H
ST
AT
US
/RE
SE
T_O
UT
R459
DN
F
3v3_C
D
CL
16
CL
12
HF
_G
ND
C414
47n
3v3_H
F
RP
402
100R
*4
DG
ND
C415
22uF
/16V
HF
_G
ND
3v3_H
F
3v3_C
DD
GN
D
3v3_C
D
DG
ND
C411
22n
C4
12
22
n
C4
07
10
0n
C4
06
10
0n
C4
08
10
0n
C4
10
22
uF
/16
V
HF
_G
ND
CD
T_R
DY
CD
T_D
AT
CD
T_C
LK
DG
ND
R403
10R
R4
04
10
R
1v8_C
D
R407
10k
3v3_C
D
3v3_C
D T401
BC
817
R4
01
22
0R
R4
02
75
0R
DG
ND
1v8_C
D
C405
22n
HF
_G
ND
C413
22uF
/16V
VC
OM
DG
ND
BIA
S
C416
100n
Moto
rdri
ver
Bia
s
TP
401
D1_1
TP
40
2D
1_
2
TP
40
3D
2_
1T
P4
04
D2
_2
TP
40
5D
3_
1T
P4
06
D3
_2
TP
40
7D
4_
1T
P4
08
D4
_2
TP
40
9
VR
EF
C417
100n
DG
ND
TP
410
RF
BU
FF
TP
412
S1
TP
413
S2
RA
SL
R436
22k
R4
33
30
k
R4
21
22
k
FO
+5V
_M
OT
OR
C430
22n
C4
31
10
0u
F/1
0V
MO
TO
_G
ND
BIA
S
MO
TO
R-
MO
TO
R+
RA
DIA
L-
RA
DIA
L+
FO
CU
S+
FO
CU
S-
SL
ED
-
SL
ED
+
TR
AY
-
TR
AY
+
MO
TO
_G
ND
MO
TO
_G
ND
/ST
AN
DB
Y
FWD 1
OPIN1+ 2
OPIN1- 3
OPOUT1 4
OPIN2+ 5
OPIN2- 6
OPOUT2 7
Vcc 8
LO- 9
LO+ 10
VO2- 11
VO2+ 12
VO1- 13
VO1+ 14VO4+15
VO4-16
VO3+17
VO3-18
GND19
BIAS20
MUTE21
OPOUT322
OPIN3-23
OPIN3+24
OPOUT425
GND G1GNDG2
OPIN4-26
OPIN4+27
REV28
IC402
BA
5984F
P
R4
37
1R
0
R4
32
1R
0
R4
11
22
k
MO
TO
1
MO
TO
2R
422
22k
R4
20
4.7
kC
43
71
n5
C0
G
R4
18
4.7
kC
43
51
n5
C0
G
R4
17
4.7
kC
43
41
n5
C0
G
TR
AY
_C
ON
TR
OL
+
TR
AY
_C
ON
TR
OL
-
R415
4.7
kC
43
81
n5
C0
G
R4
14
3.6
kC
43
21
n5
C0
G
BIA
S
BIA
SR
435
3.6
k
BIA
SR
434
4.7
k
BIA
SR
412
3.6
k
MO
TO
_G
ND
DG
ND
ST
402
ST
AR
2
I/P
O/P
G
VR
401
LM
1117M
PX
-3.3
DG
ND
+5V
_C
D3v3_H
F
C420
22n
C42
12
2n
C4
22
22
uF
/16
V
R4
19
BM
L1
8E
G1
21
SN
1D
3v3_C
D
CO
N403
SIL
_3W
CO
N4
02
SIL
_4
W
CO
N4
04
SIL
_6
W
SL
ED
+S
LE
D-
IN_S
W
DG
ND
DG
ND
LE
D1
LE
D2
TR
AY
-T
RA
Y+
HO
ME
SW
ITC
H
DG
ND
MO
TO
R+
MO
TO
R-
CO
N405
CO
NL
IF25
+5V
_C
D
DG
ND
DO
BM
TR
AY
_C
ON
TR
OL
+T
RA
Y_
CO
NT
RO
L-
IN_S
W/S
TA
ND
BY
/RE
SE
T_O
UT
I2C
_D
AT
AI2
C_S
CL
K
LE
D_D
ET
EC
T1
LE
D_
DE
TE
CT
2
CD
T_
CL
KC
DT
_D
AT
CD
T_R
DY
SC
LK
_O
UT
WC
LK
_O
UT
DA
TA
_O
UT
LE
D_
ON
3v3_L
ED
LE
D_O
N
R409
100k
R4
08
47
R
T4
02
DT
B11
3Z
D4
01
TS
AL
62
00
D4
02
TS
AL
62
00
DG
ND
V_L
ED
DG
NDR413
30k
R4
16
30
k
3v3_L
ED
LE
D1
Yel
low
Red
R425
10k
R4
26
10
0R
R4
27
2k2 T4
03
A
IMX
1
T403B
IMX
1
V_L
ED
DG
ND
D403
1N
4148
D4
04
1N
41
48
R4
28
4.7
k LE
D_D
ET
EC
T1
3v3_L
ED
LE
D2
R429
10k
R4
30
10
k
D4
05
1N
41
48
D40
6
1N
41
48
R4
31
4.7
k
V_L
ED
DG
ND
3v3_L
ED
V_L
ED
LE
D_D
ET
EC
T2
C404
22uF
/16V
R4
40
BM
L1
8E
G1
21
SN
1D
C4
18
22
n
HF
_G
ND
C419
100n
R4
39
DN
F
R438
DN
F
DG
ND
3v3_C
D
R423
1R
0
X4
01
8.4
67
2M
Hz
GS
X-3
33
DG
ND
C423
33pF
R4
41
10
k+
5V
_C
D
C426
100n
MO
TO
_G
ND
DG
ND
R460
DN
F
R461
DN
F
R462
DN
F
R463
DN
F
FO
_T
ES
T
RA
_T
ES
T
MO
1_
TE
ST
MO
2_
TE
ST
C427
100uF
/10V
DG
ND
C428
100n
RP
40
3
10
0R
*4
3v3_C
D
R467
BM
L18E
G121S
N1D
+5V
_M
OT
OR
R468
100k
3v3_C
D
3v3_L
ED
TP
414
S7051-4
2R
TP
41
5
S7
05
1-4
2R
Spri
ng
Ter
mH
arw
in
C447
100n
C4
48
10
0n
DG
ND
Decoder and sled drive
CDXt Signature service manual Issue 1© Cyrus Audio Ltd Aug 2014
Servo PCB schematic diagram
29