Read Sony CFD-S26L / CFD-S36L Service Manual online
14
CFD-S26L/S36L
TP
(RF)
TP
(VREF)
TP
(RF)
TP
(VREF)
– CD board (conductor side) –
TP
(FE)
TP(TE)
TY
TX
Adjustment Location:
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 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
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 ( ) 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)
Test Point:
RF level :
0.85
0.85
± 0.2 Vp-p
VOLT/DIV : 50 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.
L4
CT5
TP (VT)
CT1
CT3
L1
L2
T2
TP (JW2)
T1
L3-1
L3
L3-2
L4
LW
FREQUENCY
COVERAGE
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
CT3, L3-1
MW
TRACKING
ADJUSTMENT
CT5, L3-2
LW
TRACKING
ADJUSTMENT
CT1, L1
FM
TRACKING
ADJUSTMENT
T1
MW
IF
ADJUSTMENT
T2
FM
IF
ADJUSTMENT
– MAIN board (component side) –
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