Mechanical Adjustments - Sony TCM-40DV Service Manual

BELT
1 capstan belt
2 FR belt
pulley (FR) assy
FR belt
capstan belt
motor DC
flywheel assy
3 counter belt
pulley counter
counter tape
counter belt
– 6 –
SECTION 4

MECHANICAL ADJUSTMENTS

1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
erase head
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
FWD
CQ-102C
Forward Back
Tension
FF, REW CQ-201B
Tape Tension Measurement
Mode Tension Meter
FWD CQ-403A
pinch roller
rubber belt
Meter Reading
22 – 48 g•cm
(0.31 – 0.67 oz•inch)
1.0 – 4.5 g•cm
(0.014 – 0.063 oz•inch)
more than 50 g•cm
(more than 0.69 oz•inch)
Meter Reading
more than 50 g
(more than 1.76 oz)