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JVC AV28BT7ENS Service Manual page 11

Colour television
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ADJUSTMENTS
Measuring
Item
instrument
SCREEN
Signal
VOLTAGE
Generator
Adjustment
Remote
Control
unit
SERVICE MENU
SERVICE
ADJUST.....
OPTIONS.....
SELECT OPTION menu
FOCUS
Signal
Adjustment
generator
B1
DC
VOLTAGE
Voltmeter
check
Test point
Adjustment part
SCREEN VR
[FBT]
OPTION 02
FBT
FOCOUS
SCREEN
FOCUS VR
[FBT]
Marked
[150/115V]
on the
MAIN PWB
1. Receive a PAL colour bar.
2. Enter the option settings in the SERVICE MENU.
3. Press the UP / DOWN ( ▲ / ▼ ) key, and Enter Option 02 .
4. To change bit 6, come on to it by using L / R (
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.
1. Receive a PAL circle pattern.
2. Adjust the upper VR of the FBT, until you get the Optinum
focus, the sharpest picture.
1. Check whether the voltage at the point named and silk
screened as "150 / 115V" on the MAIN PWB is 150V DC.
No. 51883
AV28BT7ENS / AV28BT7ENB
AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB
Description
/
) key and
11

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