– 9 –
RV601
0000
2
jack (J301)
digital frequency
counter
set
16
Ω
test tape
WS-48A
(3 kHz, 0 dB)
PRECAUTION
• Supplied voltage : 2.5V
• Control position
VOL control : maximum
• Test Tape
Type Signal Used for
WS-48A 3 kHz, 0 dB tape speed adjustment
TAPE SECTION 0 dB = 0.775 V
Tape Speed Adjustment
Procedure:
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head pinch lever assy
capstan wheel assy 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 CQ-102C
20 – 42 g • cm
(0.28 – 0.58 oz • inch)
FWD
CQ-102C
less than 2 g • cm
Back Tension (less than 0.03 oz • inch)
REV CQ-102RC
20 – 42 g • cm
(0.28 – 0.58 oz • inch)
REV
CQ-102RC
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)
SECTION 4
ELECTRICAL ADJUSTMENTS
SECTION 3
MECHANICAL ADJUSTMENTS
1. Playback WS-48A (tape center part) in the FWD state and
adjust RV601 so that the frequency counter reading
becomes 3,000 Hz.
Specification Value:
Digital frequency counter
2,985 to 3,015 Hz
2. Playback WS-48A (tape center part) in the REV state.
Check that the frequency counter reading is within ± 1.0% of
the reading of step 1.
Adjustment Location:
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