XR-1790 (serv.man2) - Sony Car Audio Service Manual (repair manual). Page 2

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

3

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

3

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

4

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

6

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7

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Tape Deck Section .......................................................... 11
Tuner Section .................................................................. 12

5-1. Notes for Printed Wiring Board and

Schematic Diagram ......................................................... 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 – ................... 18
5-7. IC Pin Function Description ........................................... 20

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• 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.