CMT-CPX1, HCD-CPX1 - Sony Audio Service Manual (repair manual). Page 2

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2
HCD-CPX1
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED
LINE  WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS
AND  IN  THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE
OPERATION.  REPLACE  THESE  COMPONENTS  WITH
SONY  PARTS  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
3
2.
GENERAL
Location of Controls .......................................................
7
Setting the Clock .............................................................
8
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
9
3-2. Case ................................................................................. 10
3-3. Front Panel Section ......................................................... 10
3-4. TC Board, Mechanical Deck .......................................... 11
3-5. MAIN Board ................................................................... 11
3-6. Tuner Unit ....................................................................... 12
3-7. CD Mechanism Deck (CDM55C-K6BD44S) ................ 12
3-8. Loading Board ................................................................. 13
3-9. Cam (CDM55) ................................................................ 13
3-10. Base Unit (BU-K6BD44S) ............................................. 14
4.
TEST  MODE
.............................................................. 15
5.
ELECTRICAL  ADJUSTMENTS
Deck Section ................................................................... 17
CD Section ...................................................................... 18
6.
DIAGRAMS
6-1. Block Diagram  – CD Servo Section – ........................... 19
6-2. Block Diagram  – TUNER/TAPE DECK Section – ...... 20
6-3. Block Diagram  – MAIN Section – ................................ 21
6-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 22
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
6-6. Printed Wiring Board  – BD Board – ............................. 24
6-7. Schematic Diagram  – BD Board – ................................ 25
6-8. Printed Wiring Board  – TC Board – .............................. 26
6-9. Schematic Diagram  – TC Board – ................................. 27
6-10. Printed Wiring Boards
 – LOADING/MAIN Boards – ....................................... 29
6-11. Schematic Diagram  – MAIN Board (1/2) – .................. 30
6-12. Schematic Diagram
– LOADING/MAIN (2/2) Boards – ............................... 31
6-13. Printed Wiring Board  – AMP Board – .......................... 32
6-14. Schematic Diagram  – AMP Board – ............................. 33
6-15. Printed Wiring Boards
– BACK LIGHT/LCD/SWITCH Boards – .................... 34
6-16. Schematic Diagram
 – BACK LIGHT/LCD/SWITCH Boards – ................... 35
6-17. Printed Wiring Board
 – HP/ SP OUT/POWER Boards – ................................. 36
6-18. Schematic Diagram
  – HP/ SP OUT/POWER Boards – ................................ 37
6-19. IC Pin Function Description ........................................... 42
7.
EXPLODED  VIEWS
7-1. Case Section .................................................................... 45
7-2. Front Panel Section-1 ...................................................... 46
7-3. Front Panel Section-2 ...................................................... 47
7-4. Lid (TC) Section ............................................................. 48
7-5. Chassis Section-1 ............................................................ 49
7-6. Chassis Section-2 ............................................................ 50
7-7. Chassis Section-3 ............................................................ 51
7-8. CD Mechanism Deck Section
(CDM55C-K6BD44S) .................................................... 52
7-9. Base Unit (BU-K6BD44S) ............................................. 53
8.
ELECTRICAL  PARTS  LIST
............................... 54
This appliance is 
classified as a CLASS 1 
LASER product. This 
label is located on the 
rear exterior.
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