SONY TC-KB920S - Service Manual Immediate Download

MICROFILM

SERVICE MANUAL

STEREO CASSETTE DECK

AEP Model

E Model

Australian Model

Model Name Using Similar Mechanism

TC-KE500S

Tape Transport Mechanism Type

TCM-190VB14

SPECIFICATIONS

TC-KB920S

Dolby noise reduction and HX Pro headroom ex-

tension manufactured under license from Dolby

Laboratories Licensing Corporation. HX Pro origi-

nated by Bang & Olufsen.

"DOLBY", the double-D symbol

a, and "HX PRO"

are trademarks of Dolby Laboratories Licensing Cor-

poration.

Continued on next page

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 chip component replacement

· Never reuse a disconnected chip component.

· Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK

! OR DOTTED

LINE WITH MARK

! 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 PUB-

LISHED BY SONY.

MODEL IDENTIFICATION

BACK PANEL

3-020-984-

AEP Model

: 0

Australian Model

: 2

Malaysia, Singapore Model: 3

TABLE OF CONTENTS

GENERAL ................................................................... 4

DISASSEMBLY ......................................................... 5

MECHANICAL ADJUSTMENTS ....................... 9

ELECTRICAL ADJUSTMENTS ......................... 10

DIAGRAMS

5-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 14

5-2. Printed Wiring Boards MD Section ......................... 15

5-3. Schematic Diagram MD Section .............................. 17

5-4. Printed Wiring Board MAIN Section ...................... 19

5-5. Schematic Diagram MAIN Section (1/2) ................. 21

5-6. Schematic Diagram MAIN Section (2/2) ................. 23

5-7. Printed Wiring Board DOLBY-S Section ............... 25

5-8. Schematic Diagram DOLBY-S Section .................. 25

5-9. Printed Wiring Boards POWER Section ................. 27

5-10. Schematic Diagram POWER Section ...................... 28

5-11. Printed Wiring Boards PANEL Section .................. 29

5-12. Schematic Diagram PANEL Section ........................ 31

5-13. IC Pin Function Description ........................................... 33

EXPLODED VIEWS ................................................ 35

ELECTRICAL PARTS LIST ............................... 40

SECTION 1

GENERAL

LOCATION OF CONTROLS

1 I/O (Power) button

2 Remote control sensor

3 PHONES jack

4 Display panel

5 Tape operation buttons

AMS*

0 button

· button

AMS*

) button

p button

P PAUSE button

R REC MUTING button

r REC button

6 Tape counter

7 Counter buttons

RESET button

MEMORY button

8 Cassette holder

9 § EJECT button

!º AUTO CAL button

!¡ DOLBY NR switch

!TM BIAS control

!£ BALANCE control

!¢ CAL REC LEVEL control

! MONITOR button

!§ REC LEVEL control

* AMS is an abbreviation for Automatic Music Sensor.

FRONT PANEL SECTION

MD ASS'Y SECTION

Note: Follow the disassembly procedure in the numerical order given.

SECTION 2

DISASSEMBLY

CASE

Unscrew the four case attachment seven tapping screws and

remove the case.

1 three flat cables

(CN803 805)

2 connector

(CN704)

4 claw

3 screw

(BVTP3

× 8)

2 two connectors

(CNP304, CN801)

2 five connectors

(CNP301 303, 305, 306)

3 four screws

(BVTP3

× 8)

5 front panel

section

4 two screws

(BVTT2.6

× 8)

5 two screws

(BVTP2.6

× 8)

6 Remove the MD ass'y section

to direction of arrow A.

2 two

claws

3 cassette lid

ass'y

2 two claws

1 Push the eject button.