No. 51881
AV28BT5ENS / AV28BT5ENB
AV28BT5EES / AV28BT5EEB
11
ADJUSTMENTS
Item
Measuring
instrument
Test point
Adjustment part
Description
SCREEN
VOLTAGE
Adjustment
Signal
Generator
Remote
Control
unit
SCREEN VR
[FBT]
OPTION 02
1. Receive
a
PAL
colour bar.
2. Enter the Option settings in the SERVICE MENU.
3. Press the function
▲
/
▼
key, and Enter
Option 02
.
4. To change bit 6, come on to it by using function / and
make it “1” by pressing “1” white bit 2 is blinking.
5. Observe the thin horizontal blue-white line in the middle of the
screen, and adjust the lower VR of the FBT, until the line is in
its thinnest visible thickness.
6. Then make Option 02 bit 6 “0” , by pressing “0” on the remote
control unit, although you do not see any picture.
FOCUS
Adjustment
Signal
generator
FOCUS VR
[FBT]
1. Receive
a
PAL
circle pattern.
2. Adjust the upper VR of the FBT, until you get the Optinum
focus, the sharpest picture.
B1
VOLTAGE
check
DC
Voltmeter
Marked
[150/115V]
on the
MAIN PWB
1. Check whether the voltage at the point named and silk
screened as “150 / 115V” on the MAIN PWB is 150V DC.
