WX-VX55, WX-VX55S - Sony Car Audio Service Manual (repair manual). Page 20

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

swab: 

     

playback heads 

pinch rollers

     rubber belts 

capstan

     idlers
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.

Note:  With this set, it is not necessary to apply suitable locking com-

pound to the parts after the azimuth adjustment.

Forward

CQ-102C

2.46 – 5.39 mN • m

(25 to 55 g • cm)

(0.35 – 0.76 oz • inch)

Forward
Back Tension

CQ-102C

0.15 – 0.39 mN • m

(1.5 to 4 g • cm)

(0.02 – 0.06 oz • inch)

Reverse

CQ-102RC

2.46 – 5.39 mN • m

(25 to 55 g • cm)

(0.35 – 0.76 oz • inch)

Reverse
Back Tension

CQ-102RC

0.15 – 0.39 mN • m

(1.5 to 4 g • cm)

(0.02 – 0.06 oz • inch)

FF, REW

CQ-201B

4.91 – 14.70 mN • m

(50 to 150 g • cm)

(0.69 – 2.08 oz • inch)

Forward

CQ-403A

more than 5.89 mN • m

(more than 60 g • cm)

(more than 2.12 oz • inch)

Reverse

CQ-403R

0 dB=0.775V

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.

P-4-A063

6.3 kHz, –10 dB

Head Azimuth Adjustment

WS-48A

3 kHz, 0 dB

Tape Speed Adjustment

PB  HEAD  AZIMUTH  ADJUSTMENT
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 3 dB.

3.  Check the phase in the FWD PB mode.

4.  Repeat the above adjustment for the REV PB mode.
5.  Check that output level difference between FWD PB mode and 

REV PB mode is within 4 dB.

Adjustment Location: See page 21

Ω

° 90 ° 135 ° 180 °

Ω

Ω