Sony RCD-W1 Service Manual page 21

CD-R 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
BD-R board
TP(RRF IN)
IC406 1 pin
Procedure :
1. Connect oscilloscope to TP (RRFIN) and IC406 1 pin.
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.
Note : Clear RF signal waveform means that the shape " ◊ " can be clearly
distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
E-F Balance (1 Track jump) Check
BD-R board
TP(TE)
IC406 1 pin
oscilloscope
11T
3T
3T= 0.55 ± 0.07Vp-p
11T= 0.90 ± 0.13Vp-p
oscilloscope
Procedure :
1. Connect oscilloscope to TP (TE) and IC406 1 Pin.
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.
1 track jump waveform
0V
level=1.3 ± 0.6Vp-p
A
Specified level: –– × 100=less than ±22%
B
Adjustment Location:
[BD-R BOARD] (Conductor Side)
IC203
TP
(FE)
TP
(TE)
IC701
( See next page for the component side location. )
RCD-W1
center of
waveform
B
A (DC voltage)
symmetry
TP
(RRF IN)
IC401
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