XR-F5100S - Sony Car Audio Service Manual (repair manual). Page 14

14

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.

With this set, it is not necessary to apply suitable locking compound
to the parts after the azimuth adjustment.

•

Mode

Torque Meter

Meter Reading

2.46 – 5.39 mN

⋅m

Forward

CQ-102C

(25 – 55 g

⋅cm)

(0.35 – 0.76 oz

⋅inch)

Forward

0.15 – 5.39 mN

⋅m

Back Tension

CQ-102C

(1.5 – 4 g

⋅cm)

(0.02 – 0.06 oz

⋅inch)

2.46 – 5.39 mN

⋅m

Reverse

CQ-102RC

(25 – 55 g

⋅cm)

(0.35 – 0.76 oz

⋅inch)

Reverse

0.15 – 0.39 mN

⋅m

Back Tension

CQ-102RC

(1.5 – 4 g

⋅cm)

(0.02 – 0.06 oz

⋅inch)

4.91 – 14.70 mN

⋅m

FF, REW

CQ-201B

(50 – 150 g

⋅cm)

(0.69 – 2.08 oz

⋅inch)

•

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 5.89 mN

◊m

(more than 69 g)

Reverse

CQ-403A

(0.69 – 2.08 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.

•

Type

Signal

Used for

P-4-A063

6.3 kHz, –10 dB

head azimuth Adjustment

WS-48A

3 kHz, 0 dB

Tape Speed Adjustment

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 15

level 

meter

test tape 
P-4-A063
(6.3 kHz, –10 dB)

set

speaker out terminal

4 

Ω

+
–

screw
position

L-CH
peak

within
3 dB

output
level

L-CH
peak

R-CH
peak

within
3 dB

angle

R-CH
peak

test tape 
P-4-A063
(6.3 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