Sony WM-W800 Service Manual

SECTION 3
ADJUSTMENTS
WM-W800
PRECAUTION
1. Clean the following parts with a denatured-
alcohol-moistened swab:
REC/PB head pinch roller
capstan rubber belts
erase head
2. Demagnetize the REC/PB head with a head
demagnetizes
(Take care not to demagnetize the erase head.)
3. Do not use a magnetized screwdriver for the
adjustments.
4. The adjustments should be performed with the
rated power supply voltage (2.5V) unless other¬
wise noted.
3-1. MECHANICAL ADJUSTMENTS
Pinch Roller Pressure Measurement
Procedure:
— playback mode —
1. Pull the spring scale in the direction of the arrow.
2. Slowly return the pinch roller and read the spring
scale just when the pinch roller starts to rotate.
Specifications:
150 ± 20g
Torque Measurement
Perform with 2.5V DC power.
Torque
meter
Meter reading
FWD
CQ-102C
20 -40 g-cm
(0.28 - 0.56 oz-inch)
FF, REW
CQ-201B
More than 60 g-cm
(More than 0.83 oz-inch)
Back
Tension
CQ-102C
0 - 2.5 g-cm
(0 — 0.034 oz-inch)
Tape Pulling
Force
CQ-403
More than 45 g-cm
(More than 0.62 oz-inch)
Thrust Clearance Adjustment
Thrust clearance
Adjustment Parts
(Refer to exploded
views and parts list.)
Motor wheel
0.2mm
No. 114
Take-up reel
0.05-0.15mm
No. 108/110/111
Supply reel
0.05-0.15mm No. 117
Reverse wheel
0.05-0.15mm
No. 152/154
reverse wheel
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Sony WM-W800 Specifications

General

Brand	Sony
Model	WM-W800
Category	Measuring Instruments
Language	English