Read Sony ICF-M88B Service Manual online
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
– PANEL/POWER SUPPLY Section – ........................... 12
6-4.
Schematic Diagram
– PANEL/POWER SUPPLY Section – ........................... 13
– 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
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
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.
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.
Click on the first or last page to see other ICF-M88B service manuals if exist.