XR-1890 - Sony Car Audio Service Manual (repair manual). Page 2

– 2 –

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

3

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

3

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

4

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

5

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

6

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

9

Tape Deck Section ..........................................................

9

Tuner Section .................................................................. 10

5-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 12

5-2. Printed Wiring Board  – MAIN Section – ...................... 13
5-3. Schematic Diagram – MAIN Section (1/2) – ................. 15
5-4. Schematic Diagram – MAIN Section (2/2) – ................. 17
5-5. Printed Wiring Board  – PANEL Section – .................... 19
5-6. Schematic Diagram  – PANEL Section – ....................... 19
5-7. IC Pin Function Description ........................................... 22

................................................ 24

............................... 30

• 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.