Sony U-Ceiver ICB-U655, Service Manual

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TABLE  OF  CONTENTS

1.

SERVICING  NOTES

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

3

2.

GENERAL

Before You Begin ............................................................

4

Features ...........................................................................

4

Precautions ......................................................................

4

Power Sources .................................................................

5

Operation .........................................................................

5

Other features ..................................................................

5

3.

DISASSEMBLY

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

6

4.

ELECTRICAL  ADJUSTMENTS

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7

5.

DIAGRAMS

5-1. Block Diagram ................................................................

9

5-2. Printed Wiring Boards .................................................... 12
5-3. Schematic Diagram ......................................................... 15
5-4. IC Pin Function Description ........................................... 22

6.

EXPLODED  VIEWS

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

7.

ELECTRICAL  PARTS  LIST

............................... 26

Flexible Circuit Board Repairing

• 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.

Notes on chip component replacement

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

aged by heat.