XR-C6103SP - Sony Car Audio Service Manual (repair manual). Page 16

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[SOURCE]

 button: FM

L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.

Specification: Separation more than 28 dB

Adjustment Location: See page 18.

FM RF signal

generator

Carrier frequency : 98.0 MHz
Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main: 1 kHz, 20 kHz deviation (26.7%)
  sub: 1 kHz, 20 kHz deviation (26.7%)

19 kHz pilot: 7.5 kHz deviation (10%)

0.01 

µ

F

set

antenna jack (J1)

+
–

LINE OUT

level meter

10 k 

Ω

FM Stereo

Level meter

Level meter

signal generator

connection

reading (dB)

output channel

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV4 on TU1

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on TU1

for minimum reading.

Make this adjustment after “FM Auto Scan/Stop Level Adjustment”.
Setting:

[SOURCE]

 and 

[MODE]

 button: MW

Procedure:
1. Set to the test mode. (See page 14.)
2. Push the 

[SOURCE]

 button and set to FM.

3. Push the 

[MODE]

 button and set to MW.

Display

4. Push the preset 

[3]

 button.

Display

5. Adjust with the volume RV1 on TU1 so that the “MW” indi-

cation turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.

Display

Adjustment Location: See page 18.

AM RF signal

generator

Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level

: 33 dB (44.7 

µ

V)

(50 

Ω

)

set

AM dummy antenna

30 

Ω

15 pF

65 pF

antenna jack (J1)

999

MW

SHUF1

999

MW

SHUF1

3

999

SHUF1

3