Sony CDX-C90 Service Manual ▷ View online
– 41 –
2-13. CHASSIS (T) SUB ASSY
2-14. LEVER ASSY
2
P 2x3
3
chassis (T) sub assy
1
P 2x3
5
guide (disc)
1
PS 2x4
6
lever (R) assy
7
lever (L) assy
2
DISC IN SW board
4
claws
3
tension spring (LR)
– 42 –
2-15. SERVO BOARD
2-16. ROLLER ASSY
• When installing, take note of the positions
arm (roller) and washers. (Fig. 1)
arm (roller) and washers. (Fig. 1)
2
PS 2x5
3
heat sink
7
CN2
0
SERVO board
6
PS 2x4
8
P 2x3
9
loading motor assy
1
PS 2x5
5
CN5
4
CN4
5
LOAD SW board
4
PS 2x3
1
tension spring (RA)
2
arm (roller)
3
roller assy
washer
arm
washer
Fig. 1
arm
washers
– 43 –
2-17. CHASSIS (OP) (O/S) ASSY
2-18. OPTICAL PICK-UP BLOCK
6
chassis (OP) (O/S) assy
7
compression spring (FL)
4
Fit lever (D) in the
direction of the arrow.
3
damper (T)
2
damper (T)
5
Turn loading ring in the
direction of the arrow.
1
tension spring (angle)
8
compression spring (FL)
1
P 2x3
2
sled motor assy
3
optical pick-up block
– 44 –
FM RF signal
generator
generator
antenna
terminal
terminal
0.01
µ
F
set
SECTION 3
ELECTRICAL ADJUSTMENTS
Carrier frequency : 97.9 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 FM.
1. Set to the test mode.
2. Push the SOURCE button and set to FM.
Display
FM Auto Scan/Stop Level Adjustment
Setting :
SOURCE button : FM
3. Push the preset 3 button.
Display
4. Adjust with the volume RV2 on TU701 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.
But, in case of already indicated “FM0”, turn the RV2 so that
put out light “0” indication and adjustment.
Display
CD SECTION
CD section adjustments are done automatically in this set.
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 AM Auto Scan/Stop Level adjustments can be
performed easier than it in ordinary procedure.
Scan/Stop Level and AM 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 (WIDE)
3. FM Stereo Separation Adjustment (NARROW)
4. AM Auto Scan/Stop Level Adjustment
to the following sequence.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment (WIDE)
3. FM Stereo Separation Adjustment (NARROW)
4. AM Auto Scan/Stop Level Adjustment
0 dB = 1
µ
V
Adjustment Location : See page 46.
EL
D
EL
D
EL
D
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