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– 14 –
TP (RFO)
TP (RFO)
Adjustment Location: main board
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
#£
(TP RFO) and
GND on CD board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
^
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)
π
Test Point:
RF level :
1.3
±
0.5 Vp-p
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.
LW
TRACKING
ADJUSTMENT
FH1
ANTENNA
TERMINAL
TP (VT)
JW17
L2
FM
FREQUENCY
COVERAGE
ADJUSTMENT
L4
LW
FREQUENCY
COVERAGE
ADJUSTMENT
T1
MW IF
ADJUSTMENT
FM
TRACKING
ADJUSTMENT
CT1
L1
L3-2
CT5
MW
TRACKING
ADJUSTMENT
CT3
L3-1
– MAIN BOARD (COMPONENT SIDE) –
– CD board (conductor side) –