Read Sony CFD-C1000 Service Manual online
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C733
C701
R738
C752
R
726
R777
C702
C705
R721
R701
C757
C718A
C706
C703
C704
C736
C707
R728
C731
R
R778
R707
Q701
R705
R706
R716
R714
R717
R715
S301
RESET
R713
R718
R704
R736
TP (RFO)
IC701
1
14
26
27
39
40
55
56
B
C
E
TP (RFO)
– main board (conductor side) –
Adjustment Location: main board
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between IC701 pin #£ (TP RFO) and
GND on Main board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
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 ( ) in the
center of the waveform can be clearly distinguished.
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)
π
Test Point:
RF level :
1.3
1.3
±
0.5 Vp-p
VOLT/DIV : 200 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
TIME/DIV : 500 nS
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
and raise vertical sensitivity.
IC2
IC3
FE1
L5
AM
FREQUENCY
COVERAGE
ADJUSTMENT
AM
FREQUENCY
COVERAGE
ADJUSTMENT
AM
TRACKING
ADJUSTMENT
TRACKING
ADJUSTMENT
T2
AM
IF
ADJUSTMENT
AM
IF
ADJUSTMENT
TC2
L4
TP1
(VT)
(VT)
– main board (component side) –
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