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P-57A
|
GENERAL
ALIGNMENT
INSTRUCTIONS
1. VIDEO
I-F ALIGNMENT
TEST EQUIPMENT & CONNECTION (See Fig. 10)
MARKER
GENERATOR (25 ~ 45MHz)....-.-- Couple loosely to the out put cable of sweep generator
SWEEP GENERATOR
(25 ~ 45MHz)..........- Connect the capacitor
(0.01:F) to the test point (TP) of tuner.
OSCILLOSCOPE
...
1...
cee ce
eee eee eee Connect the resistor (100K) to terminal (HA1167 16* pin).
BIAS SUPPIEY sesciiies ence gts eiasde wereie's b06-3
6 Add 2 ~ 6V of AGC voltage.
SWEEP
MARKER
STEP
GENERATOR | GENERATOR
| ADJUST
EEMAn iS
Adjust 40.40MHz trap
me
40.40MHz, 400Hz
Adjust so that the signal of 400Hz
Adjust 33.40MHz trap
oe
33.40MHz, 400Hz
Adjust so that the signal of 400Hz
ENE aaa Eee
=
Adjust video IF
aa
36.50MHz, 400Hz
Adjust so that the signal of 400Hz
A
.
38.90MHz
-
T201
:
:
:
Adjust video IF
ee
Adjust so that the signal in
ee
| 25 ~ 45MHz
oe
L207
oscilloscope become
Fig. 11.
If the same characteristic as that of Fig. 11 does not appear, readjust STEP 1 ~ STEP 4.
32.4MHz t |OOKHz
38.9MHz
TP3O0I
R340
SWEEP
40.4MHz tIOOKHz
GENERATOR
pe — 5.
SMH
31.SMHz
* }OOKHz
= 5.5V
th
10.5V =
seve
Fyhaui2ze
8#PIN
or more)
(36d8
or more)
3.940.25MHz__|
(6dB~3d8)
(45dB
or more}
(22dB~32dB)
5dB~8dB
Fig. 10
aa by pe
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