Cd Section - Sony CFD-S550 Service Manual

CFD-S550
Adjustment Location:
– MAIN board (component side) –
TP (FM IN)
(CONDUCTOR SIDE)
T1 T1
AM
IF
ADJUSTMENT
T2 T2
FM
IF
ADJUSTMENT

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.
16
CT3, L3
TRACKING
ADJUSTMENT
L3
L1 CT1 CT1, L1
FM
TRACKING
ADJUSTMENT
L2
IC1
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
) in the
RF level :
0.85 ± 0.2 Vp-p
AM
CT3
L4 L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
Test Point:
– CD board (conductor side) –
R709
C738
TP
(VREF)
C739
TP
(TE)
C732
TP TP
(VREF) (TE)
TP (VT)
(CONDUCTOR SIDE)
IC2
TP
(RF)
R711
R710
C746
R729
C731
TP JW726
(RF)
C703
TP
(FE)
TX
TY
FX FY
C716
C709 C711
C730
JW724
C747
C744
C745
FB701