Sony WM-F75 Service Manual page 3

Fm/am stereo cassette player
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NOTE
ON REPAIR
This 'model is waterproof
so be sure to confirm
waterproofing after repair.
WATERPROOF
CHECK
(1) Perform with the ornamental sheet, knob orna-
mental
plate
and
ornamental
plate
(A),
(C)
removed. (See page 5.)
cd
(If there is leakage when checking with them on,
they must be replaced with new ones.)
:
(3) Place inmore than 30cm of water for 30 minutes.
(Close DC jack and packing firmly.)
7
|
more than 30cm
(11-7/8 inch) |
(4) Remove
from the water after 30 minutes and >
_ wipe off all moisture.
(5) Check all operations.
(If water has entered, ab-
normal operation will occur.)
(6) Open the cassette case and wipe off all moisture
on the packing and case sections touching the
packing.
packing
section
7
touching the packing
out.
682888
COOOOCOOO
ornamental sheet and ornamental plate assy (A). |
(Wipe off the water on the screw to prevent. |
rusting.)
|
|
IF LEAKAGE
OCCURS
DURING
WATERPROOF
CHECK:
Dry the mechanism section and amp board, jack,
etc.
with
a hairdryer,
perform
waterproofing
pro-
cedures again and recheck starting with step (1).
PARTS
IDENTIFICATION
®
PHONES (headphones) jack
TUNING knob
VOL (volume) control
hs
He
o y
DOLBY NR (noise reduction)/FM SENS (sensitivity) selector
FUNCTION
selector
S S
tee
2
us
@ (stop) button
¥ (playback) button
(fast reverse) button
4 (fast forward) button
y DIRECTION
(tape transport direction) button
Dial scale
_
DC.IN 3V (external power input) jack
REV [> (reverse)/FM STEREO indicator
<| FWD (forward)/BATTERY indicator
DIRECTION MODE switch
Battery compartment
SECTION 1
BLOCK DIAGRAM
$302-2 [FM MODE
.
LOCAL @==DX(US, CANADIAN MODEL
MONO<@==STIAEP,UK,E MODEL)
L2
$30I-1
AEP,UK,E
FM i
;
FUNCTION
MODEL
o
~)
TAPE
1
ext
FM
= AM mm
; fg
1 FM OSC
——
(OFFI
|
PLAYBACK
AMP
|
$302-
OOLBY NR
—L-CH—
(FWD) —-—
&
HP301
P
PLAYBACK
|
HEAD
;
:
ei
(REV) ~—
|
3
fences)
R-CH
$902
5
MOTOR DRIVE
$301-!
HEAD SELECT
Q60)
FUNCTION
TAPE
OFF)
901
—R-CH—
:
| 3
¥ (PoweR)
eet
bee
ea

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