HCD-EC59, HCD-EC590, MHC-EC59, MHC-EC590 - Sony Audio Service Manual (repair manual). Page 2

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

2-1. Disassembly 

Flow 

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

2-2.  Side Panel (L)/(R) ...........................................................   7
2-3. Top 

Panel 

Assy 

................................................................   7

2-4.  Front Panel Block ...........................................................   8
2-5. Knob 

(VOL) 

....................................................................   8

2-6. MAIN 

Board 

...................................................................   9

2-7.  Base Unit (BU-D1BD74UR) ..........................................   10
2-8.  Optical Pick-up Block (DA11MMVGP) ........................   10

TEST  MODE 

 ............................................................   11

ELECTRICAL  CHECKS 

 ......................................   13

5-1.  Printed Wiring Board - CD Section - ..............................   18
5-2.  Schematic Diagram - CD Section - .................................   19
5-3.  Printed Wiring Board - USB Section - ............................   20
5-4.  Schematic Diagram - USB Section - ..............................   21
5-5.  Printed Wiring Boards - MAIN Section - .......................   22
5-6.  Schematic Diagram - MAIN Section - ...........................   23
5-7. Printed 

Wiring 

Boards 

 

- 2CH AMP/USB-JACK/JACK Boards - .......................   24

5-8. Schematic 

Diagram 

 

- 2CH AMP/USB-JACK/JACK Boards - .......................   25

5-9.  Printed Wiring Board - PANEL Board - .........................   26
5-10.  Schematic Diagram - PANEL Board - ............................   27
5-11. Printed Wiring Board 
 

- PT-SWITCH Board (SUFFIX-11) - .............................   28

5-12. Printed Wiring Board 
 

- PT-SWITCH Board (SUFFIX-12)  - ............................   28

5-13.  Schematic Diagram - PT-SWITCH Board - ...................   29

 

6-1. Overall 

Section 

...............................................................  32

6-2.  Front Panel Section .........................................................   33
6-3. Chassis 

Section 

...............................................................  34

6-4.  Top Panel Section ...........................................................   35

  ..............................   36

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

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.

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 classifi ed as 
a CLASS 1 LASER product.
This marking is located on the 
rear exterior.

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 

Note: Refer to the “2CH AMP AND  PT-SWITCH BOARDS 

DISCRIMINATION” (page 14) for how to distinguish 
SUFFIX-11 and SUFFIX-12.