HCD-GT111, HCD-GT222, HCD-GT444, HCD-GT555, MHC-GT111, MHC-GT111BP, MHC-GT222, MHC-GT444, MHC-GT555 - Sony Audio Service Manual (repair manual). Page 2

Read Sony HCD-GT111 / HCD-GT222 / HCD-GT444 / HCD-GT555 / MHC-GT111 / MHC-GT111BP / MHC-GT222 / MHC-GT444 / MHC-GT555 Service Manual online

HCD-GT111/GT222/GT444/GT555
2
1. 
SERVICING  NOTES
  .............................................   3
2. GENERAL
  ..................................................................   7
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................   9
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.  DC Fan (M102), Back Panel ...........................................   12
3-7. MAIN 
Board 
...................................................................  12
3-8.  CD Mechanism Block .....................................................   13
3-9.  DC Fan (M101), 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 
 ......................   20
6. ELECTRICAL 
 
ADJUSTMENTS 
 ........................   21
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
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
TABLE  OF  CONTENTS
SAFETY-RELATED COMPONET 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  PUBLISHED  BY  SONY.
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 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.
This appliance is 
classified as a CLASS 1
LASER product. This
marking is located on the 
rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.
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
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
  ..............................   73
Ver. 1.4
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