Sony CDX-3183 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)
arm (roller) and washers. (Fig. 1)
5
PS 2x4
1
CN3
3
P 2x3
4
loading motor assy
7
SERVO board
2
CN2
6
PS 2x4
Fig. 1
4
PS 2x3
5
LOAD SW board
1
tension spring (RA)
2
arm (roller)
3
roller assy
washer
arm
arm
washer
washers
– 14 –
2-11. CHASSIS (OP) (O/S) ASSY
2-12. OPTICAL PICK-UP BLOCK
1
P 2x3
2
sled motor assy
3
optical pick-up block
1
tension spring (angle)
8
compression spring (FL)
7
chassis (OP) (O/S) assy
9
compression spring (FL)
2
tension spring (KR1)
5
Fit lever (D) in the
direction of the arrow.
3
damper (T)
4
damper (T)
6
Turn loading ring in the
direction of the arrow.
– 15 –
SECTION 3
ELECTRICAL ADJUSTMENTS
Carrier frequency : 98.00 MHz
Output level
Output level
: 22 dB (12.6
µ
V)
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 :
D-BASS switch : OFF
SOURCE button : FMI
SOURCE button : FMI
3. Push the preset 3 button.
Display
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.
because its internal block is difficult to repair.
TEST MODE
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 performed easier than it in ordinary procedure.
Scan/Stop Level and MW Auto Scan/Stop Level adjustments can
be performed 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.
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. MW Auto Scan/Stop Level Adjustment
to the following sequence.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. MW Auto Scan/Stop Level Adjustment
0 dB = 1
µ
V
SHUF
FMI
4. Adjust with the volume RV2 on TU01 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.
But, in case of already indicated “FMI I”, turn the RV2 so that
put out light “I” indication and adjustment.
Display
SHUF
FMI
SHUF
FMI I
antenna
terminal
FM RF signal
generator
0.01
µ
F
set
Adjustment Location : See page 17.
– 16 –
FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FMI
SOURCE button : FMI
Carrier frequency : 98.00 MHz
Output level
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main : 1 kHz, 20 kHz deviation (26.5%)
sub : 1 kHz, 20 kHz deviation (26.5%)
19 kHz pilot : 7.5 kHz deviation (10%)
19 kHz pilot : 7.5 kHz deviation (10%)
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 TU01 for
minimum reading.
minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV4 on TU01 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 28 dB
Adjustment Location : See page 17.
Procedure :
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
LINE OUT REAR
10 k
Ω
level meter
set
MW Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch
: OFF
SOURCE
n MODE button : MW
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
output level
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7
µ
V)
Procedure :
1. Set to the test mode. (See page 15.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
1. Set to the test mode. (See page 15.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
Display
4. Push the preset 3 button.
Display
5. Adjust with the volume RV1 on TU01 so that the “MW”
indication turns to “MWI” indication on the display window.
But, in case of already indicated “MWI”, turn the RV1 so that
put out light “I” indication and adjustment.
But, in case of already indicated “MWI”, turn the RV1 so that
put out light “I” indication and adjustment.
Display
AM RF signal
generator
AM dummy
antenna (50
Ω
)
set
antenna
terminal
terminal
30
Ω
65 pF
15 pF
Adjustment Location : See page 17.
ST
SHUF
MW
ST
SHUF
MW
ST
SHUF
I
MW
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