Sony ICF-M88B - S2 Sports Bicycle Radio, Service Manual

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2
ICF-M88B
TABLE OF CONTENTS
1. SERVICING NOTES
............................................... 2
2. GENERAL
................................................................... 3
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 4
3-2. Cabinet (Lower) Block .................................................... 4
3-3. Chassis Assy .................................................................... 5
3-4. MAIN Board .................................................................... 5
4. TEST MODE
.............................................................. 7
5. ELECTRICAL ADJUSTMENTS
......................... 8
6. DIAGRAMS
6-1. Printed Wiring Boards – TUNER Section – ................... 10
6-2. Schematic Diagram – TUNER Section – ....................... 11
6-3. Printed Wiring Board
– PANEL/POWER SUPPLY Section – ........................... 12
6-4. Schematic Diagram
– PANEL/POWER SUPPLY Section – ........................... 13
7. EXPLODED VIEWS
7-1. Cabinet (Upper) Section .................................................. 16
7-2. Chassis Section ................................................................ 17
7-3. Cabinet (Lower) Section .................................................. 18
8. ELECTRICAL PARTS LIST
................................ 19
Notes on chip component replacement
•
Never reuse a disconnected chip component.
•
Notice that the minus side of a tantalum capacitor may be
damaged by heat.
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•
Unleaded solder melts at a temperature about 40 ˚C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•
Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.