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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 (
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
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.
) in the
RF level :
0.85 ± 0.2 Vp-p
Test Point:
– CD board (conductor side) –
R709
R710
C738
TP
(VREF)
TP
C739
TP
(FE)
(TE)
C732
TX
FX
TP
TP
(VREF)
(TE)
ICF-CD832
TP
(RF)
R711
C730
C746
JW724
R729
C731
TP
JW726
(RF)
C703
C744
C745
TY
FY
C716
FB701
C709
C711
C747
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