Mechanical Adjustment; Electrical Adjustment - Sony WM-FS220 Service Manual

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MECHANICAL ADJUSTMENT

3 7 63 1515 0
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
rubber belts
2. Do not use a magnetized screwdriver for the adjustments.
Torque Measurement
Mode
FWD
FWD
Back Tension
FF, REW
TE
L 13942296513
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SECTION 4
PRECAUTION
pinch roller
capstan
Torque Meter Meter Reading
20 to 42 g•cm
CQ-102C
(0.27 to 0.58 oz•inch)
More than 2.0 g•cm
CQ-102C
(More than 0.027 oz•inch)
More than 50 g•cm
CQ-201B
(More than 0.69 oz•inch)
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ELECTRICAL ADJUSTMENT

8
TAPE SECTION
Test Tape
Tape
WS-48A
Tape Speed Adjustment
Procedure:
Mode: Playback
Test tape
WS-48A
(3 kHz, 0 dB)
Adjustment Value: normal tape speed
Adjust the tape speed adjustment RV601, so that the freqency counter
reading becomes 3,000Hz.
Specification Value:
Digital frequency counter
2,970 to 3,030 Hz
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3 6 7 1 3
Frequency difference between the beginning and the end of the tape
should be within 1.5 % (45 Hz).
Adjustment Location:
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— 7 —
SECTION 5
2 9 9 4 2 8
Signal
3 kHz, 0 dB Tape speed adjustment
16 Ω
Set
J301 (phones)
1 5 0 5 8 2 9 9 4
RV601
m
co
9 9
0 dB = 0.775 V
Used for
digital frequency
counter
+
–
2 8 9 9