– 7 –
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 V
TAPE SECTION
+
–
frequency counter
set
i
jack
test tape
WS-48A
(3kHz, 0 dB)
FX373 (Canadian): 32
Ω
others: 16
Ω
label (model)
RV601
