XR-C6100 - Sony Car Audio Service Manual (repair manual). Page 14

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98.00

SHUF1

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 Noise Focus Adjustment
3. FM Stereo Separation Adjustment
4. MW Auto Scan/Stop Level Adjustment

[SOURCE]

 button: FM

FREQUENCY SELECT switch: FM50 k

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

[SOURCE]

 button and set to FM.

Display

3. Adjust with the volume RV2 on TU1 so that the “FM” indica-

tion 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 16.

FM RF signal

generator

Carrier frequency : 98.0 MHz
Output level

: 22 dB (12.6 

µ

V)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation

0.01 

µ

F

set

antenna jack (J1)

FM

98.00

SHUF1

 0 dB=1 µV

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV231 (L-CH) and RV131 (R-CH) so that the level

meter reading is –6±1 dB (0.35 to 0.44 V).

Adjustment Location: See page 16.

Preset 

[3]

 (DOLBY) button

: NR OFF

SEL (BAS) button

: Center

SEL (TRE) button

: Center

SEL (BAL) button

: Center

SEL (FAD) button

: Center

SEL (VOL) button

: Maximum

D-BASS control

: OFF

set

+
–

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

MAIN board

level meter

MAIN board

TP (DOLBY )

TP (GND)







L-CH: IC301 

7

R-CH: IC301

@¢