Sony TCM-40DV, Service Manual

Page: 6 / 14

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BELT
1
capstan belt
2
FR belt
3
counter belt
SECTION 4
MECHANICAL ADJUSTMENTS
Tape Tension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head pinch roller
erase head rubber belt
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer. (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 (2.5 V) unless otherwise noted.
Torque Measurement
Mode Torque Meter Meter Reading
FWD
22 – 48 g•cm
CQ-102C
(0.31 – 0.67 oz•inch)
Forward Back 1.0 – 4.5 g•cm
Tension (0.014 – 0.063 oz•inch)
FF, REW CQ-201B
more than 50 g•cm
(more than 0.69 oz•inch)
Mode Tension Meter Meter Reading
FWD CQ-403A
more than 50 g
(more than 1.76 oz)
capstan belt
FR belt
pulley (FR) assy
pulley counter
counter tape
counter belt
flywheel assy
motor DC