XR-1900 - Sony Car Audio Service Manual (repair manual). Page 10

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Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 60 g

Reverse

CQ-403R

(more than 2.12 oz)

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

swab:

playback head

pinch roller

rubber belt

capstan

idler

2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply

voltage (14.4 V) unless otherwise noted.

Mode

Torque Meter

Meter Reading

Forward

CQ-102C

25 – 55 g•cm

(0.35 – 0.76 oz•inch)

Forward

CQ-102C

1.5 – 4 g•cm

Back Tension

(0.02 – 0.06 oz•inch)

Reverse

CQ-102RC

25 – 55 g•cm

(0.35 – 0.76 oz•inch)

Reverse

CQ-102RC

1.5 – 4 g•cm

Back Tension

(0.02 – 0.06 oz•inch)

FF, REW

CQ-201B

50 – 150 g•cm

(0.69 – 2.08 oz•inch)