XR-C6093SP - 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

idlers

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

Tension Meter

Meter Reading

Forward

CQ-403A

more than 90 g

(more than 3.18 oz)

Reverse

CQ-403R

more than 90 g

(more than 3.18 oz)

•

Mode

Torque Meter

Meter Reading

Forward

CQ-102C

30 - 65 g•cm

(0.42 - 0.90 oz•inch)

Forward

CQ-102C

0.5 - 4.5g•cm

Back Tension

(0.01 - 0.06 oz•inch)

Reverse

CQ-102RC

30 - 65 g•cm

(0.42 - 0.90 oz•inch)

Reverse

CQ-102RC

0.5 - 4.5g•cm

Back Tension

(0.01 - 0.06 oz•inch)

FF, REW

CQ-201B

60 - 200 g•cm

(0.83 - 2.78 oz•inch)

0 dB= 0.775 V

1. The adjustments should be performed in the order given in

this service manual.

2. The adjustments should be performed for both L-CH and

R-CH.

Procedure:
1. Put the set into the FWD PB mode.

2. Turn the screw and check the output peak value.  Adjust the

screw so that the peak value in channels L and R coincides
within 2 dB.

3. Check the phase in the FWD PB mode.

Type

 Signal

 Used for

P-4-A100

10 kHz, –10 dB

head azimuth adjustment

WS-48A

3 kHz, 0 db

tape speed adjustment

level meter

test tape 
P-4-A100
(10 kHz, –10 dB)

set

speaker out terminal

–

+

4 

Ω

screw
position

L-CH
peak

within
2 dB

output
level

L-CH
peak

R-CH
peak

within
2 dB

angle

R-CH
peak

test tape 
P-4-A100
(10 kHz, –10 dB)

L-CH

R-CH

speaker out terminal

oscilloscope

V

H

+ +

–

–

Screen pattern

in phase

good

wrong

45 

°

90 

°

135 

°

180 

°

4 

Ω

4 

Ω

set