CMT-VB5, HCD-VB5 - Sony Audio Service Manual (repair manual). Page 2

Read Sony CMT-VB5 / HCD-VB5 Service Manual online

2
TABLE OF CONTENTS
The laser diode in the optical pick-up block may suffer electrostatic
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.
NOTES  ON  LASER  DIODE  EMISSION  CHECK
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 emission,
observe from more than 30 cm away from the objective lens.
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 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.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation 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.
1. GENERAL
·········································································· 3
2. DISASSEMBLY
································································ 5
3. SERVICE MODE
······························································ 8
4. ELECTRICAL ADJUSTMENTS
································· 9
5. DIAGRAMS
5-1. BLOCK DIAGRAM –CD SECTION– ······················· 11
–VIDEO SECTION– ··················································· 12
–MAIN SECTION– ···················································· 13
–PANEL/POWER SECTION– ···································· 14
5-2. Circuit Boards Location ·············································· 15
5-3. Waveforms ··································································· 15
5-4.
PRINTED  WIRING BOARD –BD SECTION– ······· 16
5-5.
SCHEMATIC  DIAGRAM –BD SECTION– ············ 17
5-6.
PRINTED  WIRING BOARDS
–MAIN SECTION– ··················································· 18
5-7.
SCHEMATIC  DIAGRAM
–MAIN SECTION(1/2)– ··········································· 19
5-8.
SCHEMATIC  DIAGRAM
–MAIN SECTION(2/2)– ··········································· 20
5-9.
PRINTED  WIRING BOARDS
–POWER SECTION– ················································ 21
5-10. PRINTED  WIRING BOARD
–PANEL SECTION– ················································· 22
5-11. SCHEMATIC  DIAGRAM
–PANEL SECTION– ················································· 23
5-12. PRINTED  WIRING BOARDS
–VIDEO  CD SECTION– ·········································· 24
5-13. SCHEMATIC  DIAGRAM
–VIDEO CD SECTION(1/2)– ··································· 25
5-14. SCHEMATIC  DIAGRAM
–VIDEO CD SECTION(2/2)– ··································· 26
5-15. SCHEMATIC  DIAGRAM
–LOADING SECTION– ············································ 27
5-16. PRINTED  WIRING BOARDS
–LOADING SECTION– ············································ 27
5-17. IC Pin Function ·························································· 28
5-18. IC Block Diagrams ····················································· 32
6. EXPLODED  VIEWS
................................................... 34
7. ELECTRICAL  PARTS  LIST
................................... 39
SAFETY-RELATED COMPONENT 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.
Page of 47
Display

Click on the first or last page to see other CMT-VB5 / HCD-VB5 service manuals if exist.