Table Of Contents - Sony HCD-GT444 Service Manual

HCD-GT111/GT222/GT444/GT555
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1. SERVICING NOTES
2. GENERAL
..................................................................
3. DISASSEMBLY
3-1. Disassembly Flow ...........................................................
3-2. Side-L/R Case ................................................................. 10
3-3. Top Panel Block .............................................................. 10
3-4. Tape Mechanism Deck .................................................... 11
3-5. Front Panel Block ........................................................... 11
3-6. Back Panel ...................................................................... 12
3-7. MAIN Board ................................................................... 12
3-8. CD Mechanism Block ..................................................... 13
3-9. POWERAMP Board ....................................................... 13
3-10. Base Unit ......................................................................... 14
3-11. OP Base Assy (KSM-213D) ........................................... 14
3-12. Belt (DLM3A) ................................................................ 15
4. TEST MODE
............................................................ 16
5. MECHANICAL ADJUSTMENTS
6. ELECTRICAL ADJUSTMENTS
7. DIAGRAMS
7-1. Block Diagram - CD SERVO, USB Section - ................ 23
7-2. Block Diagram - MAIN Section - ................................... 24
7-3. Block Diagram - AMP Section - ..................................... 25
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L 13942296513
7-4. Block Diagram
- PANEL, POWER SUPPLY Section - ........................... 26
7-5. Schematic Diagram - CD Board (1/2) - .......................... 28
7-6. Schematic Diagram - CD Board (2/2) - .......................... 29
7-7. Printed Wiring Board - CD Board - ................................ 30
7-8. Printed Wiring Board - TC Board - ................................. 31
7-9. Schematic Diagram - TC Board - ................................... 31
7-10. Printed Wiring Board - USB Board - .............................. 32
7-11. Schematic Diagram - USB Board - ................................. 33
7-12. Printed Wiring Boards - REG Section - .......................... 34
7-13. Schematic Diagram - REG Section - .............................. 34
7-14. Printed Wiring Board - MAIN Board - ........................... 35
7-15. Schematic Diagram - MAIN Board (1/4) - ..................... 36
7-16. Schematic Diagram - MAIN Board (2/4) - ..................... 37
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.
www
Flexible Circuit Board Repairing
• Keep the temperature of 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.
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TABLE OF CONTENTS

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7-17. Schematic Diagram - MAIN Board (3/4) - ..................... 38
7-18. Schematic Diagram - MAIN Board (4/4) - ..................... 39
7-19. Printed Wiring Boards - JACK Section - ........................ 40
7-20. Schematic Diagram - JACK Section - ............................ 40
7-21. Printed Wiring Board - POWERAMP Board - ............... 41
7-22. Schematic Diagram - POWERAMP Board (1/2) - ......... 42
7-23. Schematic Diagram - POWERAMP Board (2/2) - ......... 43
7-24. Printed Wiring Board - DISPLAY Board - ..................... 44
7-25. Schematic Diagram - DISPLAY Board - ........................ 45
7-26. Printed Wiring Boards - PANEL Section - ..................... 46
7-27. Schematic Diagram - PANEL Section - .......................... 47
7-28. Printed Wiring Board
- TRANS1 Board (GT111: 120V AC area in E, 240V AC
area in E, Chilean and Peruvian models) - ...................... 48
7-29. Schematic Diagram - TRANS1 Board
(GT111: 120V AC area in E, 240V AC area in E,
Chilean and Peruvian models) - ...................................... 49
7-30. Printed Wiring Board - TRANS2 Board
(GT222/GT444/GT555) - ............................................... 50
7-31. Schematic Diagram - TRANS2 Board
(GT222/GT444/GT555) - ............................................... 51
7-32. Printed Wiring Board - TRANSX Board
(GT111: AEP, Russian and Argentina models) - ............. 52
7-33. Schematic Diagram - TRANSX Board
(GT111: AEP, Russian and Argentina models) - ............. 53
8. EXPLODED VIEWS
8-1. Case Section .................................................................... 63
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8-2. Loading Panel Section .................................................... 64
8-3. DISPLAY Board Section ................................................ 65
8-4. Front Panel Section ......................................................... 66
8-5. Meter Display Assy ......................................................... 67
8-6. Top Panel Section ........................................................... 68
8-7. Back Panel Section ......................................................... 69
8-8. MAIN Board Section ...................................................... 70
8-9. Chassis Section ............................................................... 71
8-10. CD Mechanism Section (CDM88A-K6BD93-WOD) .... 72
9. ELECTRICAL PARTS LIST
CAUTION
Use of controls or adjustments or performance of procedures other than
those specifi ed herein may result in hazardous radiation exposure.
This appliance is
classified as a CLASS 1
LASER product. This
marking is located on the
rear exterior.
SAFETY-RELATED COMPONET WARNING!
co
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
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
9 4 2 8
0 5 8 2 9 9 4 2 8
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WITH SONY PARTS
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