Cd Section - Sony CFD-ZW750 Service Manual

QQ
3 7 63 1515 0
Adjustment Location: main board
TRACKING
ADJUSTMENT
TRACKING
ADJUSTMENT
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 ^ 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
www
.
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
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FH1
ANTENNA
TERMINAL
L3
CT2
AM
L4
CT1
FM
L1
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
TP (VT)
JW13
) in the
RF level :
x ao
y
1.3 ± 0.5 Vp-p
i
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8
– MAIN BOARD (COMPONENT SIDE) –
Q Q
3 6 7 1 3
Test Point:
– CD board (conductor side) –
TP (RFO)
u163
.
– 14 –
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
TP (RFO)
m
co
9 9
2 8 9 9