CDX-L350, CDX-L450X, CDX-L470X, CXS-2100 - Sony Car Audio Service Manual (repair manual). Page 15

15

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

Procedure :
1. Set to the test mode.
2. Push the  SRC  button and set to FM.

SOURCE button

: FM

FREQUENCY SELECT switch (L450X/L470X) : FM 50k

3. Adjust with the volume RV2 on TU601 so that the “FM”

indication 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.

*1: L450X/L470X are indicates “98.00”.

Adjustment Location : See page 16.

The adjustments of tuner section, should be performed according
to the following sequence.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. AM Auto Scan/Stop Level Adjustment

Carrier frequency : 97.9 MHz (L350)

: 98.0 MHz (L450X/L470X)

Output level

: 22 dB (12.6 µV)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM Auto Scan/Stop Level check can be
performed easier than it in ordinary procedure.

<Set the Test Mode>
1. Turn ON the regulated power supply to ACC and BATT

terminals is “OFF” position (display 1:00).

2. Push the preset  4  button.
3. Push the preset  5  button.
4. Press the preset  1  button for more than two seconds.
5. Then the display and LED on the front panel indicates all lights,

the test mode is set.

<Release the Test Mode>
1. Push the  OFF  button.

µ

FM

97.90

Z

ST

SHUF

1

l

Display

FM0

Z

97.90

Z

ST

SHUF

1

l

Display