No. 51967
AV28BH7ENS / AV28BH7ENB
AV28BH7EPS / AV28BH7EPB
AV28BH7EES / AV28BH7EEB
14
ADJUSTMENTS
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DEFLECTION CIRCUIT
Item
Measuring
instrument
Test point
Ad justment part
Description
AGC
adjustment
Signal
generator
Remote
control unit
AGC
1. Receive a PAL BG signal at 60dB
μ
V RF signal level.
2. Select AGC with the UP/DOWN ( / ) key.
3. Adjust AGC by pressing with the LEFT/RIGHT ( / ) key till
voltage at pin9 of PL202 is equal to 3.0V
4. Press the MENU key and memoriz e the s et value.
V-SHIFT
adjustment
Signal
generator
Remote
control unit
V- SHIFT
1. Receive a circle pattern signal of vertic al frequency 50Hz.
2. Select V-SHIFT with the UP/DOWN ( / ) key.
3. Adjust V-SHIFT with the LEFT/RIGHT ( / ) key to make
A = B
.
4. Check and readjust V-SHIFT item if the adjustment becomes
improper after some other geometric adjustments are done.
5.
Press the INFORMATION key and memorize the set value.
V-SIZ E
adjustment
Signal
generator
Remote
control unit
V-SIZ E
1. Receive a cross-hatch signal.
2. Select V-SIZE with the UP/DOWN ( / ) key.
3. Adjust V-SIZE with the LEFT/RIGHT ( / ) key until
horizontal blac k lines on both the upper and lower part of the
cross-hatch pattern become very close to the upper and lower
horizontal sides of picture size and nearly about to disappear.
4. Check and readjust V-SIZE item if the adjustment becomes
improper after some other geometric adjustments are done.
5.
Press the INFORMATION key and memorize the set value.
Picture
size
100%
Screen
size
very close
very close
A
B