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
© 2004.05
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
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)
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
– 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.
3
ICF-M88B
SECTION 2
GENERAL
This section is extracted from
instruction manual.
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
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
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 .
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.
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.
ENTER/SELECT.
The beep sounds and the minute setting starts to flash.
If you hold down the Jog lever towards
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
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
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.
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
(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