Sony CDX-4160 Service Manual ▷ View online
– 13 –
2-9. SERVO BOARD
2-10. ROLLER ASSY
•
When installing, take note of the positions
arm (roller) and washers. (Fig. 1)
1 tension spring (RA)
2 arm (roller)
3 roller assy
4 PS 2x3
5 LOAD SW board
Fig. 1
4 loading motor assy
3 P 2x3
1 CN3
5 PS 2x4
7 SERVO board
6 PS 2x5
washer
arm
arm
washers
washer
2 CN2
– 14 –
2-11. CHASSIS (OP) (O/S) ASSY
2-12. OPTICAL PICK-UP BLOCK
8 compression spring (FL)
1 tension spring (angle)
5 Turn loading ring in the
direction of the arrow.
2 damper (T)
3 damper (T)
6 chassis (OP) (O/S) assy
4 Fit lever (D) in the
direction of the arrow.
7 compression spring (FL)
3 optical pick-up block
1 P 2x3
2 sled motor assy
– 15 –
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.
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.
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.
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.
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
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 RF signal
generator
0.01 µF
antenna
terminal
terminal
set
Carrier frequency : 97.9 MHz
Output level
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.
1. Set to the test mode.
2. Push the SOURCE button and set to FMI.
Display
FM Auto Scan/Stop Level Adjustment
Setting :
Setting :
D-BASS switch
: OFF
SOURCE button
: FMI
FREQUENCY SELECT switch (E model) : FM 200k
3. Push the preset 3 button.
Display
4. Adjust with the volume RV3 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 RV3 so that
put out light “I” indication and adjustment.
But, in case of already indicated “FMI I”, turn the RV3 so that
put out light “I” indication and adjustment.
Display
Adjustment Location : See page 17.
SHUFFLE
SHUFFLE
FM
I
FM
I
FM
I I
SHUFFLE
– 16 –
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.
minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV4 on TU1 for
minimum reading.
minimum reading.
L-CH stereo separation : A – B
R-CH stereo separation : C – D
The separations of both channels should be equal.
R-CH stereo separation : C – D
The separations of both channels should be equal.
Specification : Separation more than 23 dB
Adjustment Location : See page 17.
Procedure :
FM Stereo Separation Adjustment
Setting :
Setting :
D-BASS switch
: OFF
SOURCE button
: FMI
FREQUENCY SELECT switch (E model) : FM 200k
FM RF signal
generator
Carrier frequency : 97.9 MHz
Output level
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%)
19 kHz pilot : 7.5 kHz deviation (10%)
antenna
terminal
terminal
set
0.01 µF
10 k Ω
level meter
LINE OUT REAR
AM Auto Scan/Stop Level Adjustment
Setting :
Setting :
D-BASS switch
: 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
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7 µV)
AM dummy
antenna (50 Ω)
antenna (50 Ω)
antenna
terminal
terminal
set
15 pF
30 Ω
65 pF
Procedure :
1. Set to the test mode. (See page 15.)
2. Push the SOURCE button.
3. Push the MODE button and set to AM.
1. Set to the test mode. (See page 15.)
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 “IAM” indication on the display window.
But, in case of already indicated “IAM”, turn the RV1 so that put
out light “I” indication and adjustment.
But, in case of already indicated “IAM”, turn the RV1 so that put
out light “I” indication and adjustment.
Display
Adjustment Location : See page 17.
ST
SHUFFLE
ST
SHUFFLE
ST
AM
AM
I
AM
SHUFFLE
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