Cd Section - Sony CFD-S22 Service Manual

Adjustment Location:
– tuner board (component side) –
FM
L1
TRACKING
CT1
ADJUSTMENT
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
AM
L3
TRACKING L4
CT3
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 qg (TP RFO) and
GND on CD board.
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 : 200 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.
ANT1
FM
TELESCOPIC
ANTENNA
JW2
IC1
TP
(VT)
IC2
CNP1
) in the
RF level :
1.2 ± 0.3 Vp-p
– 16 –
– tuner board (conductor side) –
TP
(VT)
Test Point:
– CD board (conductor side) –
TP
TP
(RF)
(RF)
TP(VT)