Sony CFD-G550CP - CD Section Adjustments; Focus Bias Check Procedure

18
CFD-G550CP
Q701
R701
R702
R703
R704
R705
R706
R707
R708
R709
R711
R716
R719
R720
R721
R722
R729
R730
R745
C701
C703
C705
C706
C740
C710
C711
C712
C713
C714
C716
C717
C718
C719
C720
C745
C750
C751
C721
R710
R731
R755
R756
R757
R758
R759
R724
R725
R726
R727
R728
R732
R733
C708
C746
C742
C743
C744
C76
C763
R763
R764
R723
IC701
CNP701
M701
C704
C723
C707
C715
C709
TP
(RF)
TP
(VC)
– CD/MP3 board (side B) –
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 (VC).
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)