DOWNLOAD Sony HCD-VX5AJ / MHC-VX5 / MHC-VX5J / MHC-VX7 Service Manual ↓ Size: 7.94 MB | Pages: 86 in PDF or view online for FREE

MICROFILM

E Model

HCD-VX5A/VX7A

Tourist Model

HCD-VX5AJ

Photo: HCD-VX7A

Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol 

a

 are trade-

marks of Dolby Laboratories Licensing Corporation.

HCD-VX5A/VX5AJ/VX7A is the Amplifier,
Video CD player, Tape Deck and Tuner
section in MHC-VX5A/VX5AJ/VX7A.

– Continued on next page –

Model Name Using Similar Mechanism

HCD-GRX50/RXD7

CD Mechanism Type

CDM38L-5BD34L

Base Unit Name

BU-5BD34L

Optical Pick-up Name

KSS-213D/Q-RP

Model Name Using Similar Mechanism

HCD-GRX50/RXD7

Tape Transport Mechanism Type

TCM-230AWR2

CD

Section

Tape deck
Section

– 2 –

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

3

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

6

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

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

...................... 16

DECK Section ................................................................ 16
CD Section ..................................................................... 19
VIDEO Section .............................................................. 20

7-1.

Block Diagram  – CD SERVO Section – ...................... 21

7-2.

Block Diagram  – AUDIO/VIDEO CD Section – ........ 23

7-3.

Block Diagram  – TAPE DECK Section – .................... 25

7-4.

Block Diagram  – MAIN Section – ............................... 27

7-5.

Block Diagram  – DISPLAY/KEY CONTROL/
POWER SUPPLY Section – .......................................... 29

7-6.

Note for Printed Wiring Boards and
Schematic Diagrams ...................................................... 31

7-7.

Printed Wiring Board  – BD Board– ............................. 33

7-8.

Schematic Diagram   – BD Board– ............................... 35

7-9.

Schematic Diagram   – VIDEO Board (1/2) – .............. 37

7-10. Schematic Diagram   – VIDEO Board (2/2) – .............. 39
7-11. Printed Wiring Board  –

 VIDEO Board – ............................................................. 41

7-12. Printed Wiring Boards  – CD MOTOR Section – ......... 45
7-13. Schematic Diagram   – CD MOTOR Section – ............ 47
7-14. Printed Wiring Board  – AUDIO Board – ..................... 49
7-15. Schematic Diagram   – AUDIO Board – ....................... 51
7-16. Printed Wiring Board  – LEAF SW Board – ................. 53
7-17. Schematic Diagram   – LEAF SW Board – .................. 53
7-18. Printed Wiring Board  – MAIN Board – ....................... 55
7-19. Schematic Diagram   – MAIN Board (1/4) – ................ 57
7-20. Schematic Diagram  – MAIN Board (2/4) – ................. 59
7-21. Schematic Diagram  – MAIN Board (3/4) – ................. 61
7-22. Schematic Diagram  – MAIN Board (4/4) – ................. 63
7-23. Printed Wiring Board  – PANEL Board – ..................... 65
7-24. Schematic Diagram  – PANEL Board – ........................ 67
7-25. Printed Wiring Board  – CD SW Board – ..................... 69
7-26. Schematic Diagram   – CD SW Board  – ...................... 70
7-27. Printed Wiring Board

– TRANSFORMER Board– .......................................... 71

7-28. Schematic Diagram

– TRANSFORMER Board – ......................................... 71

7-29. Printed Wiring Board  – SURROUND Board – ........... 73
7-30. Schematic Diagram  – SURROUND Board – .............. 74
7-31. IC Pin Function Description .......................................... 80

............................................... 90

.............................. 99

– 3 –

!

!

This unit is equipped with a self-diagnosis function.
The function is used for diagnosing the conditions of the circuits
of the VIDEO board.
The circuits can be determined if normal or abnormal by the light-
ing of D502 of the VIDEO board.

Lighting of D502
When lit

: Operates normally

Blinks repeatedly: The circuit may be faulty.

D502

IC505

The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

• 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.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.

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

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

The following caution label is located inside the unit.

– 4 –

PART No.

MODEL

PART No.

VX5A : Saudi Arabia model

4-215-639-0

π

VX5A : Malaysia and Singapore models

4-215-639-1

π

VX5A : Taiwan model

4-215-639-2

π

VX5A : E model

4-215-639-3

π

VX5A : Thai model

4-215-639-4

π

VX5A : Hong Kong model

4-215-639-5

π

VX5A : Indonesia model

4-215-639-6

π

VX5AJ: Saudi Arabia model

4-215-639-7

π

VX5AJ: Tourist model

4-215-639-8

π

VX5AJ: E model

4-215-639-9

π

VX7A : Saudi Arabia model

4-215-640-0

π

VX7A : Malaysia and Singapore models

4-215-640-1

π

VX7A : E, Indonesia and Thai models

4-215-640-4

π