Sony CDX-4270R Service Manual ▷ View online
13
4
claws
2
DISC IN SW board
7
lever (L) assy
3
tension spring (LR)
6
lever (R) assy
5
guide (disc)
1
PS 2x4
5
chassis (T) sub assy
3
P 2x3
4
P 2x3
1
Unsolder the
lead wires.
gray
white
black
2
P 2x3
2-7. CHASSIS (T) SUB ASSY
2-8. LEVER ASSY
14
Fig. 1
4
PS 2x3
5
LOAD SW board
1
tension spring (RA)
2
arm (roller)
3
roller assy
washer
arm
arm
washer
washers
5
PS 2x4
1
CN3
3
P 2x3
4
loading motor assy
7
SERVO board
2
CN2
6
PS 2x4
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)
15
1
tension spring (KF1)
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.
1
P 2x3
2
sled motor assy
3
optical pick-up block
2-11. CHASSIS (OP) (O/S) ASSY
2-12. OPTICAL PICK-UP BLOCK
16
SHUF
SHUF
SHUF
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
set
SECTION 3
ELECTRICAL ADJUSTMENTS
Carrier frequency : 98.00 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 FM.
1. Set to the test mode.
2. Push the SOURCE button and set to FM.
Display
FM Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
SOURCE button : FM
3. Push the preset 3 button.
Display
TUNER SECTION
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.
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. FM RDS S-Meter Adjustment
4. MW Auto Scan/Stop Level Adjustment
to the following sequence.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. FM RDS S-Meter Adjustment
4. MW Auto Scan/Stop Level Adjustment
4. Adjust with the volume RV2 on TU601 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
Adjustment Location : See page 18.
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