– 8 –
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head
pinch roller
capstan
rubber belt
2. Demagnetize the playback head with a head demagnetizer.
Do not use a magnetized screwdriver for the adjustments.
3. These measurement and adjustment 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 0.027 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 0.027 oz• inch)
FF, REW
CQ-201B
more than 60 g • cm
(more than 0.84 oz• inch)
SECTION 3
ADJUSTMENTS
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
•
Supplied voltage : 2.5V.
•
Switch and control position
MEGA BASS : OFF
VOLUME control : maximum
AVLS : NORM
TAPE SECTION
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
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
3,000Hz.
Standard value : 2,985–3,015Hz
2. Playback WS-48A (tape center part) in the REV state.
Check that frequency counter reading is within
±
1.0% of the
reading of step 1.
Adjustment Location :
0 dB = 0.775V
set
test tape
WS-48A
(3kHz, 0dB)
frequency counter
32
Ω
phones jack (J301)
RV601
