HCD-GTZ2, HCD-GTZ2I, HCD-GTZ3, HCD-GTZ3I, MHC-GTZ2, MHC-GTZ2I, MHC-GTZ3, MHC-GTZ3I - Sony Audio Service Manual (repair manual). Page 2

  .............................................   3

2-1.   Disassembly Flow ...........................................................   4
2-2.   Case (Side-L/R) ..............................................................   4
2-3.   Top Case..........................................................................   5
2-4.   Front Panel Block ...........................................................   5
2-5.   DC Fan (M101) ...............................................................   6
2-6. Back 

Panel 

......................................................................   6

2-7.   MAIN Board ...................................................................   7
2-8.   DC Fan (M102) (GTZ3/GTZ3i), 
 POWER 

AMP 

Board 

......................................................  

7

2-9.  HUB Board, DMB19 Board ...........................................   8
2-10.  CD Mechanism Block (CDM88B-DVBU101) ...............   8
2-11.  Optical Pick-up Block (KHM-313CAB) ........................   9
2-12.  Belt (DLM3A) ................................................................   9

TEST  MODE 

 ............................................................   10

ELECTRICAL  CHECK 

 .........................................   12

5-1.  Block Diagram - RF SERVO, USB Section - .................   13
5-2.  Block Diagram - MAIN Section - ...................................   14
5-3.  Block Diagram - AMP Section - .....................................   15
5-4. Block 

Diagram 

 

- PANEL, POWER SUPPLY Section - ...........................   16

5-5.  Printed Wiring Board - DMB19 Board - ........................   18
5-6.  Schematic Diagram - DMB19 Board (1/3) - ..................   19
5-7.  Schematic Diagram - DMB19 Board (2/3) - ..................   20
5-8.  Schematic Diagram - DMB19 Board (3/3) - ..................   21
5-9.  Printed Wiring Board - MAIN Board - ...........................   22
5-10.  Schematic Diagram - MAIN Board (1/3) - .....................   23
5-11.  Schematic Diagram - MAIN Board (2/3) - .....................   24
5-12.  Schematic Diagram - MAIN Board (3/3) - .....................   25
5-13.  Printed Wiring Board - HUB Board - .............................   26
5-14.  Schematic Diagram - HUB Board - ................................   27

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.

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 

5-15.  Printed Wiring Board - POWER AMP Board - ..............   28
5-16.  Schematic Diagram - POWER AMP Board - .................   29
5-17.  Printed Wiring Board - DISPLAY Board - .....................   30
5-18.  Schematic Diagram - DISPLAY Board - ........................   31
5-19.  Printed Wiring Boards - PANEL Section - .....................   32
5-20.  Schematic Diagram - PANEL Section - ..........................   33
5-21.  Printed Wiring Board - TRANS1S Board 
 

(GTZ2: Chilean and Peruvian models) - .........................   34

5-22.  Schematic Diagram - TRANS1S Board 
 

(GTZ2: Chilean and Peruvian models) - .........................   35

5-23.  Printed Wiring Board - TRANSX Board 
 

(GTZ2: Mexican model/GTZ2i) - ...................................   36

5-24.  Schematic Diagram - TRANSX Board 
 

(GTZ2: Mexican model/GTZ2i) - ...................................   37

5-25. Printed Wiring Board 
 

- TRANS Board (GTZ3/GTZ3i) - ...................................   38

5-26. Schematic Diagram 
 

- TRANS Board (GTZ3/GTZ3i) - ...................................   39

6-1. Case 

Section 

....................................................................  48

6-2.  Loading Panel Section ....................................................   49
6-3.  DISPLAY Board Section ................................................   50
6-4.  Front Panel Section .........................................................   51
6-5.  Back Panel Section .........................................................   52
6-6.  MAIN Board Section ......................................................   53
6-7. Chassis 

Section 

...............................................................  54

6-8.  CD Mechanism Section (CDM88B-DVBU101) ............   55

  ..............................   56

Accessories are given in the last of the electrical parts list.

CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.

This appliance is classified as a CLASS 1 
LASER product. This marking is located on 
the rear exterior.

Note: Refer to supplement-1 for the DISPLAY board of printed 

wiring board, schematic diagram and electrical parts list of 
Mexican model.