DOWNLOAD Sony ICF-M88B Service Manual ↓ Size: 951.6 KB | Pages: 22 in PDF or view online for FREE

Model
ICF-M88B
Pages
22
Size
951.6 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-m88b.pdf
Date

Sony ICF-M88B Service Manual ▷ View online

SERVICE MANUAL
FM/AM PLL SYNTHESIZED RADIO
US Model
Canadian Model
SPECIFICATIONS
ICF-M88B
Ver 1.0  2004.05
9-877-839-01
2004E05-1
© 2004.05
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
Battery Life 
(Approx. hours)
(JEITA*)
When using
FM
AM
Sony alkaline size AA (LR6)
66
84
Sony size AA (R6)
23
31
* Measured by JEITA (Japan Electronics and Information Technology Industries
Association) standards.
The actual battery life may vary depending on circumstances of use.
Time display: 
12-hour system
Frequency range:
Band Range 
Channel 
step
FM 
87.5 - 108 MHz 
0.1 MHz
AM 
530 - 1 710 kHz 
10 kHz
531 - 1 710 kHz 
9 kHz
Speaker: 
Approx. 50 mm (2 inches) dia, 8
Power output: 
80 mW (at 10% harmonic distortion)
Power requirements: 
3V DC, two size AA (R6) batteries
Dimensions :
Approx. 166.8 
× 70 × 95 mm (w/h/d) (6 
5
8
 × 2 
7
8
 × 3 
3
4
 inches) incl.
projecting parts and control.
Mass:
 Approx. 281.4 g (9.93 oz) incl. batteries / excl. accessories
Supplied accessories:
Mount with wheel sensor (1), Thick/Thin rubber pads (2 each),
Wheel magnet (1), Zip ties (5), Double-sided tape (1), Screws (2)
Design and specifications are subject to change without notice.
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.
3
ICF-M88B
SECTION  2
GENERAL
This section is extracted from
instruction manual.
Location of Controls
RADIO POWER
LIGHT
ENTER/SELECT
TUNE MODE
BAND/SET
VOL
BAND/SET
TUNE MODE
RADI
O PO
WER
LIGH
T
VOL
E
NTER/S
ELECT
MPH
AM
PM
FM
FREEZE
P RESET
MHz
MP H
kHz
km /h  in ch
AM
km /h
m ile
CLOCK  ODO  DIST  RT  AVG  MAX
m m
RADIO POWER
LIGHT
ENTER/SELECT TUNE MODE
BAND/SET
VOL*
FM a n te n n a
FM S ENS
DX/LOCAL
J o g   le ve r
*
Th e re   is   a   ta c tile   d o t  b e s id e  VOL  to   s h o w  th e   d ire c tio n   to   tu rn   u p
th e  vo lu m e .
Setting the Clock
The clock time display of this unit is a 12-hour system.
When the batteries are first installed,  AM 12:00  flashes and  CLOCK  turns on
in the display.
1
Press RADIO POWER to turn off the power.
2
Press MODE/FREEZE repeatedly until  CLOCK  appears.
3
Hold down ENTER/SELECT for more than 2 seconds until
AM 12  starts flashing.
4
Push the Jog lever towards or  to adjust the hour, then press
ENTER/SELECT.
The beep sounds and the minute setting starts to flash.
If you hold down the Jog lever towards 
+ or —, the digit changes rapidly.
Midnight is indicated as  AM 12:00  and Noon is indicated by  PM 12:00.
g
5
Repeat step 4 above to adjust the minutes.
:  starts flashing and the clock starts operating.
To set the current time exactly to the second, adjust the minute setting and
then press 
ENTER/S ELECT to synchronize it with a time signal (such as
the telephone time signal).
No te
If you do not push the Jog lever towards 
+ or —, or ENTER/S ELECT within
about 65 seconds, the clock setting mode will be canceled.
ICF-M88B
4
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY  FLOW
SECTION  3
DISASSEMBLY
Note:
 Follow the disassembly procedure in the numerical order given.
3-2. CABINET (LOWER)  BLOCK
1
Slide the hook (battery case lid) 
in the direction of arrow, 
and open the battery case lid.
battery case lid
2
screw (P1.7 
×
 10)
4
5
Remove two solders.
3
four screws
(P1.7 
×
 10)
6
cabinet (lower) block
3-2. CABINET (LOWER) BLOCK
(Page 4)
3-3. CHASSIS ASSY
(Page 5)
3-4. MAIN BOARD
(Page 5)
SET
Page of 22
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  • DOWNLOAD Sony ICF-M88B Service Manual ↓ Size: 951.6 KB | Pages: 22 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony ICF-M88B in PDF for free, which will help you to disassemble, recover, fix and repair Sony ICF-M88B Audio. Information contained in Sony ICF-M88B Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.