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'\WM-A52/B52 ©
PRECAUTION
1.
Clean the following parts with a denaturedalcohol-
moistened swab:
playback head
pinch roller
erase head
.
__
Tubber belts
capstan
idlers
2.
Demagnetize
the
playback
head
with
a head
de-
magnetizer,
e
3.
Do not use a magnetized screwdriver for the adjust-
ments.
|
4.
After
the
adjustments,
apply
suitable locking com-
pound to the parts adjusted.
5.
The adjustments should be performed with the rated
power supply voltage unless otherwise noted.
1-1. MECHANICAL ADJUSTMENTS
TORQUE
MEASUREMENT
TAPE
TENSION
MEASUREMENT
Meter reading
_
CQ-102C
more than 90g
EWD
CQA03A
(3.17 02)
|
Tape Speed Adjustment
Setting:
VOL control:
mechanical mid
|
Procedure:
|
Mode:
playback
speed checker or
digital frequency
test tape
counter
.
WS-48A
(3 kHz OdB)
headphone jack
Play back the end of the tape in FWD mode and adjust
' RV601 for the specification.
.
The specification should be satisfied in any condition of
tape top, tape end, high and low voltage, vertical and
horizontal stand.
:
30 — 60 g°-cm
(0.41 — 0.83 0z-inch)
|
SECTION 1
ADJUSTMENTS
1-2.
ELECTRICAL
ADJUSTMENTS
PB Head Azimuth Adjustment
Procedure:
1.
Mode:
playback
test tape
P-4-A063
(6.3 kHz, -100B)
headphone jack
Turn the adjustment screw for the maximum output
leveis. If these levels do not match, turn the adjust-
ment
screw
until both of output levels match to-
Screw
peak
Position
Adjustment Location:
adjustment screw
Specification:
—
8
2910-30908
Adjustment Location: main board
-RV601
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