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SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
pinch roller
rubber belts
capstan
2. Demagnetize the playback head with a head demagnetizer.
(Do not bring the head demagnetizer close to the erase head.)
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 (1.3 V) unless otherwise noted.
Torque Measurement:
Mode
Torque meter
Meter reading
FWD
18 – 30 g•cm
CQ-102C
(0.25 – 0.41 oz•inch)
FWD
0.7 – 2.0 g•cm
back tension
(0.006 – 0.027 oz•inch)
REV
18 – 30 g•cm
CQ-102RC
(0.25 – 0.41 oz•inch)
REV
0.7 – 2.0 g•cm
back tension
(0.006 – 0.027 oz•inch)
FF
CQ-201B
more than 35g•cm
REW
(more than 0.49 oz•inch)
PRECAUTION
1. Specified voltage
: 1.3 V (DC)
2. Switch position
a
NR switch
: OFF
WIRELESS switch : OFF
BL SKIP switch
: OFF
Test tape
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
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
3,000 ± 10 Hz.
2. Playback WS-48A (tape center) in the REV state.
Check that the frequency counter reading is within 2.5% of
the reading of step 1.
* As the RV601 is mounted on the main board, adjust it through a
hole in the TMR board.
Adjutment Point:
16
Ω
Test tape
WS-48A
(3 kHz, 0dB)
set
2
jack
+
–
frequency counter
MAIN section
RV1
L1
L2
RV601
TMR board
MAIN board
