XR-4880 - Sony Car Audio Service Manual (repair manual). Page 2

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Location of Controls ....................................................... 3
Resetting the Unit ........................................................... 4
Detaching the Front Panel ............................................... 4
Setting the Clock ............................................................. 4
Installation ....................................................................... 5
Connections ..................................................................... 6

......................................................... 8

............ 10

....................... 13

Test Mode ........................................................................ 13
Tape Deck Section .......................................................... 13
Tuner Section .................................................................. 14

................................................................. 17

6-1. Printed Wiring Board  –MAIN Section– ........................ 19
6-2. Schematic Diagram  –MAIN (1/2) Section– .................. 21
6-3. Schematic Diagram  –MAIN (2/2) Section– .................. 23
6-4. Printed Wiring Board  –PANEL Section– ...................... 25
6-5. Schematic Diagram  –PANEL Section– ......................... 27
6-6. IC Pin Function Description ........................................... 29

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............................... 34

• 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.