XR-4300RV, XR-C5300RV - Sony Car Audio Service Manual (repair manual). Page 13

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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. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the power supply

voltage unless otherwise noted.

Mode

Torque Meter

Meter Reading

 2.95 – 6.37 mN•m

Forward

CQ-102C

(30 – 65 g•cm)

(0.42 – 0.90 oz•inch)

Forward

0.05 – 0.44 mN•m

CQ-102C

(0.5 – 4.5g•cm)

Back Tension

(0.01 – 0.06 oz•inch)

2.95 – 6.37 mN•m

Reverse

CQ-102RC

(30 – 65 g•cm)

(0.42 – 0.90 oz•inch)

Reverse

0.05 – 0.44 mN•m

CQ-102RC

(0.5 – 4.5g•cm)

Back Tension

(0.01 – 0.06 oz•inch)

5.89 – 19.61 mN•m

FF, REW

CQ-201B

(60 – 200 g•cm)

(0.83 – 2.78 oz•inch)

Mode

Tension Meter

Meter Reading

more than 8.83 mN•m

Forward

CQ-403A

(more than 90 g)

(more than 3.18 oz)

more than 8.83 mN•m

Reverse

CQ-403R

(more than 90 g)

(more than 3.18 oz)

0 dB=0.775 V

Speed checker

Frequency counter

–1.5 to +2.5%

2,955 to 3,075 Hz

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the

reading on the speed checker or frequency counter becomes in
specification.

Specification: Constant speed

Ω

Tuner section adjustments are done automatically in this set.