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SECTION 4
MECHANICAL ADJUSTMENT
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback/erase head
rubber belts
2.
Demagnetize the record/playback/erase head with a head
demagnetizer. (Do not bring a head demagnetizer close to the
erase head.)
3.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
• Torque Measurement
Mode
Torque Meter
FWD
CQ-102C
FWD
CQ-102C
Back Tension
REV
CQ-102RC
REV
CQ-102RC
Back Tension
FF, REW
CQ-201B
Adjustment Parts Location :
[MAIN BOARD] — SIDE A —
pinch roller
capstan
Meter Reading
1.47 to 2.45 mN•m
(15 to 25 g•cm)
(0.21 to 0.34 oz•inch)
Less than 0.20 mN•m
(Less than 2.0g•cm)
(Less than 0.028 oz•inch)
1.47 to 2.45 mN•m
(15 to 25 g•cm)
(0.21 to 0.34 oz•inch)
Less than 0.20 mN•m
(Less than 2.0g•cm)
(Less than 0.028 oz•inch)
More than 4.90 mN•m
(More than 50 g•cm)
(More than 0.69 oz•inch)
TP1
TP6
TP5
T2 : AM IF adjustment
— 11 —
SECTION 5
ELECTRICAL ADJUSTMENT
PRECAUTION
1.
Specified voltage : 1.3 V (DC)
2.
Switch and control position
MENU switch
HOLD
: OFF
VOL
: MAX
ISS
: 1
TAPE SECTION
Tape
Signal
WS-48A
3 kHz, 0 dB
Tape Speed Adjustment
Procedure:
Test tape
WS-48A
(3kHz, 0dB)
Set
2 REMOTE jack (J701)
1.
Enter the FWD playback mode.
2.
Adjust RV601 so that the value of the frequency counter reading
becomes 3,000 Hz.
Specification value:
Frequency counter
2,940 Hz – 3,060 Hz
3.
Check that the frequency deviation at the beginning and ending
of a tape is within 1.5 % (45 Hz).
[MAIN BOARD] — SIDE B —
L2 : FM frequency coverage
adjustment
'
L2
IC2
1
24
12
13
T1
T2
RV1
'
T1 : AM frequency coverage
adjustment
Used for
Tape Speed Adjustment
Frequency counter
16 Ω
+
–
RV601 : Tape speed
adjustment
'
RV601
RV1 : FM VCO adjustment
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