– 12 –
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 100 g
(more than 3.53 oz)
• Tape Tension Measurement
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head magnetizer 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 unless otherwise noted.
• Torque Measurement
Mode Torque Meter Meter Reading
FWD CQ-102C
30 – 70 g•cm
(0.42 – 0.97 oz•inch)
FWD
CQ-102C
1.5 – 5.5 g•cm
Back Tension (0.021 – 0.076 oz•inch)
FF CQ-201B
more than 60 g•cm
(more than 0.83 oz•inch)
REW CQ-201B
more than 60 g•cm
(more than 0.83 oz•inch)
Tape Speed Adjustment
Setting:
Function: TAPE
Procedure:
1. Playback WS-48A (tape center) in the FWD state.
2. Adjust the volume in CAPSTAN/REEL motor (M301) so that
the frequency counter reading becomes 3,000 Hz.
Specified Value: 2,985 to 3,015 Hz
3. Confirm that the frequency at the beginning and that at the
end of tape winding are between 2,955 to 3,045 Hz.
Adjustment Location:
PRECAUTION
Setting:
SOUND control : OFF
MEGA BASS control: OFF
TAPE DECK SECTION 0 dB=0.775 V
Test tape
Type Signal Used for
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
Tape speed
Adjustment
CAPSTAN/REEL motor
(M301)
– TAPE deck block –
+
–
set
Test tape
WS-48A
(3 kHz, 0 dB)
frequency counte
3.2
Ω
MAIN board
CNP311 pin
3
MAIN board
CNP311 pin
4
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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