ELECTRICAL ADJUSTMENTS
D3-2
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2-2: CONSTANT VOLTAGE
1.
2.
3.
4.
Place the set in AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Connect the digital voltmeter to TP401.
Adjust the VR1701 until the digital voltmeter is 115 ± 0.5V.
2-3: CUT OFF
1.
2.
3.
4.
5.
6.
Adjust the unit to the following settings.
R.BIAS=127, G.BIAS=127, B.BIAS=127, R.DRV=63,
G.DRV=07, B.DRV=63, BRI CENT=00,
CONT MAX=32.
Place the set in Aging Test for more than 20 minutes.
Place the set in AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
(TV SECTION)
2-5: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-4: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
Place the set in Aging Test for more than 20 minutes.
Receive the gray scale pattern from the Pattern
Generator.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (11) on the remote control to
select "R.BIAS".
Press the UP/DOWN button on the remote control to
select the "R.BIAS", "G.BIAS", "B.BIAS", "R.DRV",
"B.DRV" or "G.DRV".
Adjust the LEFT/RIGHT button on the remote control to
whiten the R.BIAS, G.BIAS, B.BIAS, R.DRV, B.DRV, and
G.DRV at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is achieved.
2-6: OSD HORIZONTAL
Activate the adjustment mode display of Fig. 1-1.
Press the LEFT/RIGHT button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-2).
1.
2.
B
A
TV-A
4:3
00 OSD H 14
Fig. 2-2
2-7: HORIZONTAL POSITION
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "H.POSI".
Press the LEFT/RIGHT button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes minimum.
2-9: VERTICAL SIZE
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (06) on the remote control to
select "V.SIZE".
Press the LEFT/RIGHT button on the remote control
until SHIFT quantity of the OVER SCAN on upside and
downside becomes 10±2%.
Receive a broadcast and check if the picture is normal.
2-8: VERTICAL POSITION
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "V.POSI".
Check if the step No. V.POSI is "01".
Adjust the VR404 until the horizontal line becomes fit to
the notch of the shadow mask.(Refer to Fig. 2-3).
Fig. 2-3
Shadow mask
Notch
horizontal line
