Sony TCM-20DV Section Mechanical Adjustments, Torque Measurement, Tape Tension Measurement

SECTION 4

MECHANICAL ADJUSTMENTS

1.Clean the following parts with a denatured-alcohol-moistened swab:

record/playback head	pinch roller
erase head	rubber belt
capstan	idlers

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		2.16 - 4.7 mN•m
		(22 - 48 g•cm)
	CQ-102C	(0.31 - 0.67 oz•inch)
FWD		0.05 - 0.29 mN•m
		(0.5 - 3 g•cm)
Back Tension
		(0.007 - 0.04 oz•inch)
FF		4.90 mN•m
	CQ-201B	(more than 50 g•cm)
REW		(more than 0.69 oz•inch)

Tape Tension Measurement

Mode	Torque Meter	Meter Reading
		4.90 mN•m
FWD	CQ-403C	(more than 50 g)
		(more than 1.76 oz)

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