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QQ
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Adjustment Location:
– tuner board (component side) –
T1
MW/LW IF
ADJUSTMENT
T2
FM IF
ADJUSTMENT
FM
L1
TRACKING
CT1
ADJUSTMENT
L2
FM FREQUENCY
COVERAGE
ADJUSTMENT
L4
LW FREQUENCY
COVERAGE
ADJUSTMENT
MW
L3-1
TRACKING
ADJUSTMENT
CT3
LW
CT5
TRACKING
TE
L 13942296513
ADJUSTMENT
L3-2
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 (or TP (RF))
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 : 50 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
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When observing the eye pattern, set the oscilloscope for AC range
.
and raise vertical sensitivity.
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ANT1
FM
TELESCOPIC
ANTENNA
JW2
IC1
TP
(VT)
IC2
CNP1
) in the
RF level :
1.2 ± 0.3 Vp-p
x
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u163
y
i
– 16 –
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2 9
8
– tuner board (conductor side) –
TP
(VT)
Q Q
3
6 7
1 3
1 5
Test Point:
– CD board (conductor side) –
TP
TP
(RF)
(RF)
co
.
9 4
2 8
TP(VT)
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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