Sony CFD-S400, Service Manual

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16
CFD-S400/S500
IC701
C730
R729
R708
C716
C711 C709
FB701
C736
C734
R709
C705
R704
R702
R711
R710
R703 R705 R701
C703
C731
R706
R723
C708
JC703
C743
C744
C745
C742
C707
C717
C739
C738
TP
(VREF)
TP
(TE)
TP
(FE)
TP
(RF)
C732
TY
FY
TX
FX
JW706
JW707
JW708
JW709
JW724
JW726
C746
C747
TP
(RF)
TP
(VREF)
TP
(TE)
– CD board (conductor side) –
Adjustment Location:
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.
L4
TP (FM IN)
(CONDUCTOR SIDE)
CT1
IC1
IC2
CT3
L1
L2
T2
T1
L3
– MAIN board (component side) –
L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
CT3, L3
AM
TRACKING
ADJUSTMENT
CT1, L1
FM
TRACKING
ADJUSTMENT
T1
AM
IF
ADJUSTMENT
T2
FM
IF
ADJUSTMENT
TP (VT)
(CONDUCTOR SIDE)