27
HCD-GNV99D/GNV111D
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/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 unless otherwise noted.
Torque Measurement
3.06 N • m to 6.96 N • m
FWD CQ-102C 31 to 71 g • cm
(0.43 – 0.98 oz • inch)
FWD
0.19 N • m to 0.58 N • m
back tension
CQ-102C 2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
REV CQ-102RC 31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
REV
CQ-102RC 2 to 6 g • cm
back tension
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
FF/REW CQ-201B 71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
FWD tension CQ-403A 100 g or more
(3.53 oz or more)
9.80 N • m
REV tension CQ-403R 100 g or more
(3.53 oz or more)
Mode Torque meter Meter reading
0 dB=0.775 V
DECK SECTION
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in
this service manual. (As a general rule, playback circuit
adjustment should be completed before performing recording
circuit adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
•Test Tape
RECORD/PLAYBACK HEAD AZIMUTH ADJUST-MENT
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
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