XR-CA350X - 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.

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

2

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

3

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

3

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

7

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

7

2-3. Mechanism Deck (MG-36SZ13-32) ...............................

8

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

8

2-5. Heat Sink .........................................................................

9

2-6. Bracket (MD) ..................................................................

9

2-7. DC Motor (Capstan/Reel) (M901) ................................. 10
2-8. Main Belt, Sub Belt (C) .................................................. 10
2-9. Head (Playback) (HP901) ............................................... 11

....................... 12

......................... 12

Tape Deck Section .......................................................... 12
Tuner Section .................................................................. 13

5-1. Note for Printed Wiring Boards and

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

5-2. Printed Wiring Board  – MAIN Board – ........................ 15
5-3. Schematic Diagram  – MAIN Board (1/2) – .................. 16
5-4. Schematic Diagram  – MAIN Board (2/2) – .................. 17
5-5. Printed Wiring Board  – CONTROL Board – ................ 18
5-6. Schematic Diagram  – CONTROL Board – ................... 19
5-7. IC Pin Function Description ........................................... 21

6-1. General Section ............................................................... 23
6-2. Front Panel Section ......................................................... 24
6-3. MAIN Board Section ...................................................... 25
6-4. Mechanism Deck Section (MG-36SZ13-32) ................. 26

............................... 27

In checking the control board and main board, prepare two jigs
(extension (MD) cord J-2502-060-1 and
connection cable for F/P to main J-2502-072-1).

main board
(CN600)

mechanism deck

main board (CN350)

main board (CN300)

control board (CN900)

connect jig
(connection cable 
for F/P to main J-2502-072-1)
to the main board (CN600) and
control board (CN900).

connect jig
(extention (MD) cord J-2502-060-1)
to the main board (CN300, CN350) 
and mechanism deck.

ATA: TYPE ATA
ATA/CAT: TYPE CAT

In this set, the IC101 on the MAIN board is changed from the
midway of the production.
When the replacing of the IC1, be sure to check the model name
printed by IC, and replace the IC1 by following the instructions
below.

• When replacing of the IC1 (MN101C49HAS)

Replace the IC1 with the MN101C49HEA (Part No.: 6-603-
178-01), and replace the TU101 (A-3220-944-A) simultaneously.

• When replacing of the IC1 (MN101C49HEA)

Perform the usual replacing.

In this set, the front panel is changed from the midway of the pro-
duction.
When the replacing of the FRONT PANEL or FRONT PANEL
ASSY, be sure to check the front panel in which type, and replace.