Electrical Adjustments; Tuner Section - Sony CDX-C460 Service Manual

TEST MODE
This set have the test mode function. In the test mode, FM Auto Scan/
Stop Level and AM 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.

TUNER SECTION

0 dB = 1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one because
its internal block is difficult to repair.
Note on Adjustment
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
SECTION 3

ELECTRICAL ADJUSTMENTS

FM Auto Scan/Stop Level Adjustment
Setting :
Procedure :
1. Set to the test mode.
2. Push the SOURCE button and set to FM.
3. Push the preset 3 button.
4. Adjust with the volume RV2 on TU1 so that the "FM" indication
Adjustment Location : See page 24.
– 22 –
D-BASS switch (CDX-C460)
SOURCE button
FREQUENCY SELECT switch (E model) : FM 200k
FM RF signal
generator
0.01 µF
Carrier frequency : 97.9 MHz
Output level : 22 dB (12.6 µV)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%)
Display
Display
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
: OFF
: FM
antenna
terminal
set
SHUF1
SHUF1
SHUF1