XR-C8220 - Sony Car Audio Service Manual (repair manual). Page 15

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[SHIFT]

 button

: ON (light up SET UP and

PLAY MODE)

Preset 

[4]

 (PLAY MODE)

n 

[5]

 (

n) buttons

: NR off

SOUND (BAS) button

: Center

SOUND (TRE) button

: Center

SOUND (BAL) button

: Center

SOUND (FAD) button

: Center

SOUND (VOL) button

: Maximum

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV230 (L-CH) and RV240 (R-CH) so that the level

meter reading is –6±0.5 dB (0.37 to 0.41 V).

Adjustment Location: See page 18.

 0 dB=1µV

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 Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment (WIDE)
3. FM Stereo Separation Adjustment (NARROW)
4. AM Auto Scan/Stop Level Adjustment

[SOURCE]

 button

: FM

FREQUENCY SELECT switch (E model): FM 200 k

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

[SOURCE]

 button and set to FM.

Display

3. Push the preset 

[3]

 button.

Display

4. Adjust with the volume RV2 on TUX10 so that the “FM” indi-

cation turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that
put  out light “0” indication and adjustment.

Display

Adjustment Location: See page 18.

set

+
–

test tape
P-4-D400
(400Hz, 0 dB)

level meter

MAIN board

TP (DOLBY-L)/
TP (DOLBY-R)

      

set

antenna jack

FM RF signal

generator

Carrier frequency

: 97.9 MHz

Output level

: 22 dB (12.6 

µ

V)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

0.01 

µ

F

SHUF

SHUF

SHUF