Sony CMT-CP11, Service Manual

3

1. SERVICING  NOTES

······················································ 3

2. GENERAL

·········································································· 5

3. DISASSEMBLY

································································ 7

4. SERVICE  MODE

··························································· 11

5. ELECTRICAL  CONFIRMATIONS  AND

ADJUSTMENTS

···························································· 12

6. DIAGRAMS

6-1. Circuit Boards Locations ··················································· 14
6-2. Block Diagram – TAPE Section – ····································· 15
6-3. Block Diagram – MAIN Section – ···································· 16
6-4. Block Diagram

– DISPLAY/POWER SUPPLY Section – ························· 17

6-5. Printed Wiring Board – MAIN Section – ·························· 18
6-6. Schematic Diagram – MAIN Section (1/2) – ···················· 19
6-7. Schematic Diagram – MAIN Section (2/2) – ···················· 20
6-8. Printed Wiring Boards

– LCD/HEADPHONE/LOADING/SPEAKER Section – · 21

6-9. Schematic Diagrams

– HEADPHONE/SPEAKER Section – ····························· 21

6-10. Printed Wiring Boards – CONTROL Section – ················· 22
6-11. Schematic Diagram – CONTROL Section – ····················· 23
6-12. Printed Wiring Board – POWER Section – ······················· 24
6-13. Schematic Diagram – POWER Section – ·························· 25
6-14. IC Block Diagrams ···························································· 26
6-15. IC Pin Function Description ·············································· 28

7. EXPLODED  VIEWS

····················································· 30

8. ELECTRICAL  PARTS  LIST

····································· 34

TABLE  OF  CONTENTS

SECTION  1

SERVICING  NOTES

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.

The following caution label is located inside the unit.

CAUTION

:

INVISIBLE    LASER    RADIATION    WHEN    OPEN    AND

INTERLOCKS   DEFEATED.    AVOID   EXPOSURE   TO   BEAM.

ADVARSEL :

USYNLIG   LASERSTRÅLING   VED   ÅBNING   NÅR 

SIKKERHEDSAFBRYDERE  ER  UDE  AF  FUNKTION.   UNDGÅ  UDSAETTELSE 
FOR  STRÅLING.

VORSICHT :

UNSICHTBARE  LASERSTRAHLUNG,  WENN 

ABDECKUNG  GEÖFFNET  UND  SICHERUEITSVERRIEGELUNG 
ÜBERBRÜCKT.  NICHT  DEM  STRAHL  AUSSETZEN.

VARO

!

:

AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-

TIINA  NÄKYMÄTTÖMÄLLE  LASERSÄTEILYLLE.  ÄLÄ  KATSO  SÄTEESEEN.

VARNING

:

OSYNLING LASERSTRÅLING NÄR DENNA  DEL ÄR ÖPPNAD

OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.

ADVERSEL :

USYNLIG  LASERSTRÅLING  NÅR  DEKSEL  ÅPNES  OG 

SIKKERHEDSLÅS BRYTES.  UNNGÅ EKSPONERING FOR STRÅLEN.

VIGYAZAT

! :

A  BURKOLAT  NYITÁSAKOR  LÁTHATATLAN  LÉZERSU-

GÁRVESZÉLY

!   KERÜLJE  A  BESUGÁRZÁST!