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2.3. PREPARATION
2.3.1.
Connect the horizontal output of sweep/marker generator to the horizontal input of monitor scope.
2.3.2.
Set the monitor scope gain for 0.1V/DIV.
2.3.3.
Connect the output of sweep/marker generator in series with matching pad to test point on the tuner thro
10K ohm resistor.
2.3.4.
Connect the monitor scope with direct probe to terminal TP—11
2.3.5.
Apply +16.5V power supply to TP—16 on main board.
2.3.6.
Apply +4V-~+4.5V bias to terminal TP—14 on main board.
2.3.7.
Gradually increase or decrease the output of sweep/marker generator to obtain the 1.0Vp—p response curve
on the scope.
If necessary, adjust sweep center and sweep width control for the proper location curve.
2.4. STEPS
Adjust the video detector coil (1171) for maximum amplitude at point P. (See Fig..-c 4)
TV SYSTEM TABLE
c
Colour sub—cerrier
Picture
Intermediate
frequency
frequency
PAL B/G,SECAM B/G,D/K
34.47 MHz
38.9 MHz
P
103P
10K OHM
FROM GEN.
TO TEST POINT
OUT
OF (TP)
75 OHM
C
1V
:
Pp
Figure 3
MATCHING PAD
Figure 4
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