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AFT Adjustment
tern
DC 15.5v
DC (AGC)
Output
probe
Input probe(a side)
DC 12V(JIG-A)
DC 5V
DC 9V(JIG - B)
Sweep AIT
Output
probe
Oscilloscope
SG. out put
Damping resister
JIG-A
Adjustment
Waveform
AGC Volt Alignment
R364(IC 351-1 Pin)
TP-C(C115+)
Tuner-TP
TP - L(R1 20)
Q293Base to GND
R700
IC 701 pin 3 and 4.
20dB
Side- b
10OmV/div.
——
TP-D
b-side(GND)
Fix the AGC voltage
when the overall
wave
form
level
is adjusted
at 1.OV p-p.
II
t
1
.Ovp- p
Resonance Frequency
Adj.
R364(IC 351-1 Pin)
TP - C(C1 15+)
Tuner-TP
TP-J(R191)
Q293Base to GND
R700
IC 701 pin 3 and 4.
20dB
Side- b
1Vldiv.
20 mV rms(Att. 20dB)
--
b-side(GND)
Keep AGC voltage which is
adjusted
at
AGC
volt –
alignment,
and adjust T131
for 38.9 MHz marker is just
on the reference line.
+
f=38.9MHz (Note2)
Iotel: PAL only model does not have Q293 (SW.TR.) . This connection is not necessary for
'AL only model.
MAIN UNIT
1
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CONVERTER
TRANS
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Input proba
\GC Voltage I
—7—
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