CMT-DC1K, HCD-DC1K - Sony Audio Service Manual (repair manual). Page 2

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2
HCD-DC1K
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
3
2.
GENERAL
Parts Identification ..........................................................
4
Setting the Time ..............................................................
4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Upper Cover Sub Assy ....................................................
7
3-3. CD Lid .............................................................................
7
3-4. Front Panel Section .........................................................
8
3-5. Tape Mechanism Deck ....................................................
8
3-6. CD Mechanism Deck (CDM55F-K6BD41A) ................
9
3-7. Base Unit (BU-K6BD41A) .............................................
9
3-8. Loading Motor Board ..................................................... 10
3-9. Cam (CDM55) ................................................................ 10
4.
TEST  MODE
.............................................................. 11
5.
ELECTRICAL  ADJUSTMENTS
Deck Section ................................................................... 12
CD Section ...................................................................... 13
6.
DIAGRAMS
6-1. Block Diagram  – CD SERVO Section – ....................... 15
6-2. Block Diagram  – MAIN Section – ................................ 16
6-3. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 17
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 18
6-5. Printed Wiring Board  – CD Board – ............................. 20
6-6. Schematic Diagram  – CD Board – ................................ 21
6-7. Printed Wiring Board  – TC Board – .............................. 22
6-8. Schematic Diagram  – TC Board – ................................. 23
6-9. Schematic Diagram   – MAIN Board (1/3) – ................. 24
6-10. Schematic Diagram  – MAIN (2/3)/
LOADING MOTOR/HEADPHONE Boards  – ............. 25
6-11. Schematic Diagram  – MAIN (3/3)/LCD Boards  – ...... 26
6-12. Printed Wiring Boards  – MAIN/LCD/
LOADING MOTOR/HEADPHONE Boards – .............. 27
6-13. Printed Wiring Boards
– SWITCH/I/O SWITCH Boards – ................................ 28
6-14. Schematic Diagram
– SWITCH/I/O SWITCH Boards – ................................ 29
6-15. Printed Wiring Board – POWER Board – ...................... 30
6-16. Schematic Diagram – POWER Board – ......................... 31
6-17. IC Pin Function Description ........................................... 32
7.
EXPLODED  VIEWS
7-1. Upper Cover, Tape Mech Deck Section ......................... 36
7-2. Front Panel Section ......................................................... 37
7-3. Chassis Section ............................................................... 38
7-4. CD Mechanism Deck (CDM55F-K6BD41A) ................ 39
7-5. Base Unit (BU-K6BD41A) ............................................. 40
8.
ELECTRICAL  PARTS  LIST
............................... 41
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.
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