Sony Walkman WM-FX267, Руководство по обслуживанию

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SECTION 3
MECHANICAL ADJUSTMENTS
SECTION 4
ELECTRICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured-alcoholmoistened
swab:
playback head pinch roller
capstan rubber belt
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (2.5 V) unless otherwise noted.
Torque Measurement
Mode Torque Meter Meter Reading
FWD
20 – 42 g•cm
CQ-102C
(0.28 – 0.58 oz•inch)
FWD less than 2 g•cm
Back Tension (less than 0.03 oz•inch)
FF, REW CQ-201B
more than 60 g•cm
(more than 0.83 oz•inch)
Precaution
• Supplied voltage: 2.5 V
• Switch and control position
TAPE switch: NORM
RADIO switch : ST (AEP and French models)
: DX (US and E models)
VOLUME CONTROL: maximum
AVLS switch: NORM
MEGA BASS switch: OFF
Test tape
Tape Speed Adjustment
Procedure:
Type Signal Used for
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
TAPE SECTION
+
–
test tape
WS-48A
(3 kHz, 0dB)
frequency counter
set
2
jack
16
Ω
Playback WS-48A (tape center part) and adjust RV601 so that the
frequency counter reading becomes 2,985 to 3,015 Hz.
Adjustment Location:
RV601
0 dB=0.775 V