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HCD-GT220/GT440/GT660
19
SECTION 5
MECHANICAL ADJUSTMENTS
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 demag-
netizer. (Do not bring the head magnetizer close to the erase
head.)
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
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
2.6 – 6.9 mN • m
(30 – 70 g • cm)
(0.41 – 0.97 oz • inch)
FWD
Back Tension
Back Tension
CQ-102A
0.15 – 0.59 mN • m
(1.5 – 6.0 g • cm)
(0.021 – 0.083 oz • inch)
FF/REW
CQ-201B
5.4 – 16.7 mN • m
(55 – 170 g • cm)
(0.76 – 2.35 oz • inch)
TAPE TENSION MEASUREMENT
Mode
Tension Meter
Meter reading
FWD
CQ-403A
more than 100 g
(more than 3.53 oz)
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