Sony CFD-S03CP - CD Section Focus Bias Check

16
CFD-S03CP/S03CPL
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC201 pin u; and pin th (or
TP (RFAC0) and TP (VC)).
2. Insert the disc (PATD-012 (Tr 15)). (Part No. : 4-225-203-01)
3. Press the N X (CD) button.
4. Confirm that the oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
Test Point:
B9
RFACI
VC
FEI
TEI
RFACO
APC
R257
C258
C260
C261
R258
C304
C208
R265
R266
R267
C264
C265
R278
C214
R270
C221
C292
C291
R292
R291
IC201
C217
C218
1
30
31
60
61
90
100
91
C224
0
3
C256
C251
C252
C254
C253
R254
R255
R252
R253
CN301
C213
C222
0
3
C301
C303
C273
R268
C230
R250
1-868-067-
(11)
11
TP (RFAC0)TP (VC)
– BD83S BOARD (Conductor Side) –
RF level :
1.1 Vp-p
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
+0.3
–0.2