Cd Section; Tel 13942296513 - Sony CFD-S38L Service Manual

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3 7 63 1515 0
Adjustment Location:
MW L3-1
TRACKING
ADJUSTMENT CT3
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
FM
CT1
TRACKING
ADJUSTMENT L1
TE
L 13942296513

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 #£ (TP RFO) and
GND on CD board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the CD fl 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 : 200 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
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When observing the eye pattern, set the oscilloscope for AC range
.
and raise vertical sensitivity.
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– tuner board (component side) –
) in the
RF level :
1.2 ± 0.1 Vp-p
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i
– 14 –
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2 9
8
TP
(FM ANT)
TP (VT)
(JW17)
Q Q
3 6 7 1 3 1 5
Test Point:
– main board (conductor side) –
TP (RFO)
co
.
9 4 2 8
L4
LW
FREQUENCY
COVERAGE
ADJUSTMENT
LW
CT5
TRACKING
L3-2
ADJUSTMENT
0 5 8 2 9 9 4 2 8
m
9 9
9 9