Sony RCD-W1 - SERVO Check; CD Section Servo Checks; RF Level and E-F Balance Checks

20
RCD-W1
Procedure :
1. Connect oscilloscope to TP (RF-TE) and TP (VC).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the X button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscillo-
scope waveform.
level=1.3 ± 0.6Vp-p
symmetry
A (DC voltage
)
center of
waveform
B
0V
1 track jump waveform
Specified level: –– × 100=less than ±22%
B
A
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩ impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol-
lowing checks.
RF Level Check
Procedure :
1. Connect oscilloscope to TP (RFAC) and TP (VC).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
TP(RFAC)
TP(VC)
BD board
oscilloscope
SERVO Check
Note : Clear RF signal waveform means that the shape “ ◊ ” can be clearly
distinguished at the center of the waveform.
E-F Balance (1 Track jump) Check
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
3T= 0.55
± 0.07Vp-p
11T= 0.90
± 0.13Vp-p
3T
11T
TP(RF-TE)
TP(VC)
BD board
oscilloscop
e
Adjustment Location:
[BD BOARD] (Conductor Side)
TP
(RFDC)
IC101
TP (VC)
TP (RF-TE)
TP (RFAC)
TP (RF-FE)
IC401