XR-CA300, XR-L200 - Sony Car Audio Service Manual (repair manual). Page 15

15

0 dB=1 

µ

V

When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.

Adjust the tuner section in the sequence shown below.

1. FM RDS S-Meter Adjustment
2. FM Auto Seek/Stop Level Adjustment
3. FM Stereo Separation Adjustment
4. MW Auto Seek/Stop Level Adjustment

[SOURCE]

 (CA300) or 

[TUNER]

 (L200) button: FM

Procedure:
1. Set to the test mode. (see page 13)
2. Push the 

[SOURCE]

 (CA300) or 

[TUNER]

 (L200) button and

set to FM.

Display

3. Push the 

[6]

 button.

4. Adjust RV100 on main board so that the display indication is

“8.4”.

Display

Specified Value: Display indication: 8.2 to 8.6

Adjustment Location: See page 17.

[SOURCE]

 (CA300) or 

[TUNER]

 (L200) button: FM

Procedure:
1. Set to the test mode. (see page 13)
2. Push the 

[SOURCE]

 (CA300) or 

[TUNER]

 (L200) button and

set to FM.

Display

3. Adjust with the volume RV3 on TU100 so that the “FM” indi-

cation turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV3 so that
put  out light “0” indication and adjustment.

Display

Adjustment Location: See page 17.

FM RF signal 

generator

dummy

antenna

Carrier frequency : 98.00 MHz
Output level

: 22 dB (12.6 

µ

V)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

antenna
jack (ANT100)

set

50 

Ω

50 

Ω

0.1pF

FM RF signal

generator

Carrier frequency : 98.00 MHz
Output level

: 35 dB (56.2 

µ

V)

Mode

: mono

Modulation

: no modulation

0.01 

µ

F

set

antenna jack (ANT100)

SHUF

MBP

REG

MBP

SHUF

REG

MBP

SHUF

REG

SHUF

MBP

REG