Cd Section - Sony CFD-S26 Service Manual

Adjustment Location:
– MAIN board (component side) –

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 CD N X 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.
(CONDUCTOR SIDE)
) in the
RF level :
0.85 ± 0.2 Vp-p
ADJUSTMENT
L4
CT1, L1
AM
FM
FREQUENCY
TRACKING
COVERAGE
ADJUSTMENT
ADJUSTMENT
TP (VT) L4
CT3
Test Point:
– CD board (conductor side) –
TP
(FE)
TP
(RF)
TP
(RF)
TP
(FE)
CFD-S26
T2
FM
T1
IF
AM
IF
ADJUSTMENT
TP (JW1)
T2
L2
T1
CT1
L1
L3
CT3, L3
AM
TRACKING
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
TP
(TE)
TP
(VREF)
TP
(VREF)
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