XR-C2600 - Sony Car Audio Service Manual (repair manual). Page 12

12

Make this check after “FM Auto Seek/Stop Level Adjustment”.
Setting:

[SOURCE] t [MODE] button : AM
FREQUENCY SELECT switch: AM 9 k

Procedure:
1. Set to the test mode. (See page 10)
2. Push the [SOURCE] button and set to FM.
3. Push the [MODE] button and set to AM.

Display

4. Check that the “AM” indication turns to “AM0” indication on

the display window.

Display

Adjustment Location: See page 13.

µ

±

Ω

Ω

SHUF

SHUF

FM Stereo

Level meter

Level meter

signal generator

connection

reading (dB)

output channel

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV1 on TU100

for minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV1 on TU100

for minimum reading.

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

Specification: Separation more than 26 dB

Adjustment Location: See page 13.

µ

Ω

SHUF

 0 dB=1 µV

Adjust the tuner section in the sequence shown below.

1. FM Auto Seek/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. AM Auto Seek/Stop Level Check

[SOURCE] button

: FM

FREQUENCY SELECT switch : FM 50 k

Procedure:
1. Set to the test mode. (See page 10)
2. Push the [SOURCE] button and set to FM.

Display

3. Adjust with the volume RV2 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 RV2 so that
put  out light “0” indication and adjustment.

Display

Adjustment Location: See page 13.

[SOURCE] button

: FM

FREQUENCY SELECT switch : FM 50 k

µ

µ

SHUF

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