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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
Tape Pulling Force 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)
REV
20 – 42 g•cm
CQ-102RC
(0.28 – 0.58 oz•inch)
REV less than 2 g•cm
Back Tension (less than 0.03 oz•inch)
FF, REW CQ-201B
more than 50 g•cm
(more than 0.69 oz•inch)
Mode Torque meter Meter reading
FWD CQ-403A
more than 30g
REV CQ-403R
(more than 0.41 oz)
PRECAUTION
• Supplied voltage: 2.5 V (DC)
• Switch and control position
NORM CrO2/METAL·ST/MONO switch: NORM·ST
(EXCEPT US, Canadian, 5E, 6E model)
NORM CrO2/METAL·DX/LOCAL switch: NORM·DX
(US, Canadian, 5E, 6E model)
VOLUME control: maximum
TONE CONTROL HIGH and LOW: mechanical center
AVLS switch: NORM
MEGA BASS switch: OFF
DOLBY NR switch: OFF (FX375 only)
FM/AM/TAPE (RADIO OFF) switch: TAPE (RADIO OFF)
Test tape
Tape Speed Adjustment
Procedure:
1. Playback WS-48A (tape center part) in the FWD state and ad-
just RV601 so that the frequency counter reading becomes
3,000 ± 15 Hz.
2. Playback WS-48A (tape center) in the REV state.
Check that the frequency counter reading is within 1.0% of
the reading of step 1.
Adjustment Location:
Type Signal Used for
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
0 dB=0.775 VTAPE SECTION
+
–
frequency counte
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