17
CFD-S350/S350L
IC701
Q701
C729
C730
R730
R728
R729
C704
R708
C728
R724
R725
R726
R707
C701
C720
C711
C709
FB701
C736
C734
R709
C705
R710
R701
C703
C731
R706
R727
R712
R723
C708
C751
JC703
C743
C744
C742
C707
C739
C738
R732
R735
R704
R733
R702
R734
R703
R705
R736
R738
R711
R713
R737
C719
C722
C717
C745
C732
CNP701
JW706
JW707
JW709
JW713
JW714
JW722
JW723
JW724
JW725
JW726
C750
C746
C747
C733
C706
JW712
JW710
JW708
C702
TP
(RF)
TP
(VREF)
TP
(TE)
– CD board (conductor side) –
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 IC701 pin
4
and pin
qa
(or
TP (RF) and TP (VREF)).
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
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)
Test Point:
RF level :
0.85
±
0.2 Vp-p
VOLT/DIV : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
