Sony SRF-M75PM - Walkman AM/FM Stereo Radio, Руководство по обслуживанию

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TABLE OF CONTENTS
1. SERVICING NOTES
............................................... 2
2. GENERAL
................................................................... 3
3. DISASSEMBLY
......................................................... 4
4. ELECTRICAL ADJUSTMENTS
TUNER Section .............................................................. 6
PULSE MONITOR Section ............................................ 8
5. DIAGRAMS
5-1. Block Diagram ................................................................ 9
5-2. Printed Wiring Boards ..................................................... 12
5-3. Schematic Diagram ......................................................... 15
5-4. IC Pin Function Description ........................................... 20
6. EXPLODED VIEW
................................................... 21
7. ELECTRICAL PARTS LIST
............................... 22
Forced Reset
The system microprocessor can be reset in the following proce-
dure.
Use these procedure when the unit cannot be worked normally
due to the overrunning of the microprocessor, etc.
Procedure:
1. Set to radio OFF.
2. While pressing the
[SCAN]
button, press two buttons of
[START/STOP]
and
[BAND]
simultaneously for 5 seconds.
3. The unit is reset, and display blinking “
AM
12:00 ”.
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.
SECTION 1
SERVICING NOTES