XR-L240 - Sony Car Audio Service Manual (repair manual). Page 2

2

• 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.

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

aged by heat.

Location of Controls .......................................................

3

Setting the Clock .............................................................

3

Installation .......................................................................

4

Connections .....................................................................

5

2-1. Disassembly Flow ...........................................................

8

2-2. Sub Panel .........................................................................

8

2-3. Mechanism Deck (MG-36SZ12-32) ...............................

9

2-4. MAIN Board ...................................................................

9

2-5. Heat Sink ......................................................................... 10
2-6. Bracket (MD) .................................................................. 10
2-7. Motor (Capstan/Reel) (M901) ........................................ 11
2-8. Main Belt, Sub Belt (C) .................................................. 11
2-9. Head (Playback) (HP901) ............................................... 12

....................... 13

Tape Deck Section .......................................................... 14
Tuner Section .................................................................. 15

5-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 18

5-2. Printed Wiring Board  – MAIN Board – ........................ 19
5-3. Schematic Diagram  – MAIN Board (1/2) – .................. 20
5-4. Schematic Diagram  – MAIN Board (2/2) – .................. 21
5-5. Printed Wiring Board  – CONTROL Board – ................ 22
5-6. Schematic Diagram  – CONTROL Board – ................... 23
5-7. IC Pin Function Description ........................................... 25

6-1. General Section ............................................................... 27
6-2. Front Panel Section ......................................................... 28
6-3. Mechanism Deck Section (MG-36SZ12-32) ................. 29

............................... 30

In this set with following serial No. or later IC500 on MAIN board
has been changed in the midway of production. With the conse-
quence of this change, parts mounted on MAIN board have been
changed.

ILLUMINATION COLOR

TYPE

SERIAL No.

AMBER

A

2606838 or before

B

2606839 or later

GREEN

A

2610738 or before

B

2610739 or later