CDX-C460, CDX-C560 - Sony Car Audio Service Manual (repair manual). Page 21

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– 21 –
2-11. CHASSIS (OP) (O/S) ASSY
2-12. OPTICAL PICK-UP BLOCK
8 compression spring (FL)
1 tension spring (angle)
6 chassis (OP) (O/S) assy
3 optical pick-up block
1 P 2x3
2 sled motor assy
Fit lever (D) in the
direction of the arrow.
3 damper (T)
2 damper (T)
Turn loading ring in the
direction of the arrow.
7 compression spring (FL)
– 22 –
SECTION 3
ELECTRICAL ADJUSTMENTS
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
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
0 dB = 1 µV
FM Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch (CDX-C460)
: OFF
SOURCE button
: FM
FREQUENCY SELECT switch (E model) : FM 200k
Procedure :
1. Set to the test mode.
2. Push the  SOURCE  button and set to FM.
Display
3. Push the preset  3  button.
Display
SHUF1
4. Adjust with the volume RV2 on TU1 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.
Display
Adjustment Location : See page 24.
SHUF1
SHUF1
FM RF signal
generator
0.01 µF
antenna
terminal
set
Carrier frequency : 97.9 MHz
Output level
: 22 dB (12.6 µV)
Mode
: mono
Modulation
: 1 kHz, 22.5 kHz deviation (30%)
– 23 –
FM stereo
Level meter
Level meter
signal generator
connection
reading (dB)
output channel
L-CH
L-CH
A
B
R-CH
L-CH
Adjust RV4 on TU1 for
minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV4 on TU1 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 23 dB
Adjustment Location : See page 24.
Procedure :
FM Stereo Separation Adjustment
Setting :
D-BASS switch (CDX-C460)
: OFF
SOURCE button
: FM
FREQUENCY SELECT switch (E model) : FM 200k
FM RF signal
generator
Carrier frequency : 97.9 MHz
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main : 1 kHz, 33.75 kHz deviation (45%)
sub : 1 kHz, 33.75 kHz deviation (45%)
19 kHz pilot : 7.5 kHz deviation (10%)
antenna
terminal
set
0.01 µF
10 k 
level meter
LINE OUT REAR
AM Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch (CDX-C460)
: OFF
SOURCE 
n MODE button
: AM
FREQUENCY SELECT switch (E model) : AM 10k
AM RF signal
generator
Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7 µV)
AM dummy
antenna (50 
)
antenna
terminal
set
15 pF
30 
65 pF
Procedure :
1. Set to the test mode. (See page 22.)
2. Push the  SOURCE  button.
3. Push the  MODE  button and set to AM.
Display
4. Push the preset  3  button.
Display
5. Adjust with the volume RV1 on TU1 so that the “AM”
indication turns to “AM0” indication on the display window.
But, in case of already indicated “AM0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location : See page 24.
SHUF1
SHUF1
SHUF1
TP
TP
TP
– 24 –
Adjustment Location : tuner unit (TU1)
–set upper view–
TU1
RV1
AM AUTO SCAN/
STOP LEVEL ADJ
RV2
FM AUTO SCAN/
STOP LEVEL ADJ
RV4
FM STEREO
SEPARATION ADJ

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