CDX-3150 - Sony Car Audio Service Manual (repair manual). Page 15

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This set have the test mode function. In the test mode, FM Auto Scan/
Stop Level and MW Auto Scan/Stop Level adjustments can be per-
formed easier than it in ordinary procedure.

<Set the Test Mode>
1. Set the “OFF” mode.
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 indicates all lights, the test mode is set.

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

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

The adjustments of tuner section, should be performed according to
the following sequence.
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 : FMI

FM RF signal

generator

0.01 µF

antenna
terminal

set

Carrier frequency : 98.0 MHz
Output level

: 22 dB (12.6 µV)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

Procedure :
1. Set to the test mode.
2. Push the  SOURCE  button and set to FMI.

Display

3. Push the preset  3  button.

Display

4. Adjust with the volume RV2 on TU1 so that the “FMI”

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

Display

SHUFFLE

SHUFFLE

SHUFFLE

Adjustment Location : See page 17.