XR-C543SP - Sony Car Audio Service Manual (repair manual). Page 18

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

SOURCE button: FM

See the adjustment location from on page 21 for the
adjustment.

Procedure:
1. Put the set into the FWD PB mode.

–1.5 to +2.5%

2,955 to 3,075 Hz

Specification: Constant speed

Adjustment Location: See page 21.

Preset 3 (DOLBY) button

: 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

test tape
WS-48A
(3 kHz, 0 dB)

LINE OUT

set

FM RF signal

generator

antenna jack

0.01 µF

Carrier frequency : 98.0 MHz
Output level

: 20 dB (10.0 µV)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

Procedure:
1. Set to the test mode. (See page 17).

Display

10 k

 

Ω

set

+

–

speed checker

or

frequency counter

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV121 (L-CH) and RV221 (R-CH) so that the level

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

Adjustment Location: See page 21.

main board

 



L-CH: TP101 (DOLBY-L)
R-CH: TP201 (DOLBY-R)

set

+
–

level meter

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

FM

 

98.0

SHUF1

2. Push the preset 3 button.

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 21.

 

98.0

3

SHUF1

FM

 

98.0

3

SHUF1

FM