Table Of Contents - Sony XR-4890 Service Manual

TABLE OF CONTENTS

1. GENERAL
Location of Controls ....................................................... 3
Resetting the Unit ........................................................... 4
Detaching the Front Panel ............................................... 4
Setting the Clock ............................................................. 4
Installation ....................................................................... 5
Connections ..................................................................... 6
2. DISASSEMBLY
3. ASSEMBLY OF MECHANISM DECK
4. MECHANICAL ADJUSTMENTS
5. ELECTRICAL ADJUSTMENTS
Tape Deck Section .......................................................... 14
Tuner Section .................................................................. 14
6. DIAGRAMS
................................................................. 15
6-1. Printed Wiring Board -MAIN Section- ........................ 17
6-2. Schematic Diagram -MAIN (1/2) Section- .................. 19
6-3. Schematic Diagram -MAIN (2/2) Section- .................. 21
6-4. Printed Wiring Board -PANEL Section- ...................... 23
6-5. Schematic Diagram -PANEL Section- ......................... 25
6-6. IC Pin Function Description ........................................... 27
7. EXPLODED VIEWS
8. ELECTRICAL PARTS LIST
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.
- 2 -
......................................................... 9
............ 11
....................... 14
................................................ 29
............................... 32