Electrical Adjustments - Sony CDX-L450V 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 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.
SECTION 3

ELECTRICAL ADJUSTMENTS

TUNER SECTION
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
FM Auto Scan/Stop Level Adjustment
Setting :
Procedure :
1. Set to the test mode.
2. Push the SRC button and set to FM.
3. Adjust with the volume RV2 on TU601 so that the "FM"
Adjustment Location : See page 16.
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.
SOURCE button
FREQUENCY SELECT switch : FM 50k
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level : 22 dB (12.6 µV)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%)
Display
97. 0 0 Z
FM
ST
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.
Display
97. 0 0 Z
FM0 Z
ST
CDX-L450V
: FM
antenna
terminal
0.01 µ F
set
8 Z
SHUF
8 Z
SHUF
15