JVC TV-20F242 Service Manual page 26

2-13: VERTICAL SHIFT
NOTE: Adjust after performing adjustments in section 2-12.
1. Receive the center cross signal from the Pattern
Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "V SHIFT".
4. Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the notch
of the shadow mask.
2-14: SUB BRIGHTNESS
1. Receive the black pattern*. (RF Input)
2. Using the remote control, set the brightness and
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRIGHTNESS".
4. Press the VOL. UP/DOWN button on the remote
control until the screen begin to shine.
5. Receive the black pattern*. (Audio Video Input)
6. Press the INPUT button on the remote control to set
to the AV mode. Then perform the above adjustments
2~4.
*The Black Pattern means the whole black raster signal.
Select the "RASTER" of the pattern generator, set to
the OFF position for each R, G and B.
2-15: SUB CONTRAST
1. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (14) on the remote control to
select "CONTRAST".
2. Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "86"
3. Press the INPUT button on the remote control to set
to the AV mode.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (14) on the remote control to
select "CONTRAST".
5. Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "89"
2-16: SUB TINT
1. Receive the color bar pattern. (RF Input)
2. Using the remote control, set the brightness, contrast,
color and tint to normal position.
3. Connect the synchro scope to TP806.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (16) on the remote control to
select "TINT".
5. Press the VOL. UP/DOWN button on the remote
control until the section "A" becomes a straight line.
(Refer to Fig. 2-4)
6. Increase the step numbers "3" steps with the VOL. UP
button on the remote control.
7. Receive the color bar pattern. (Audio Video Input)
8. Press the INPUT button on the remote control to set
to the AV mode. Then perform the above adjustments
2~6.
26
2-17: SUB COLOR
1. Receive the color bar pattern. (RF Input)
2. Using the remote control, set the brightness, contrast,
color and tint to normal position.
3. Connect the synchro scope to TP804.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (15) on the remote control to
select "COLOR".
5. Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
6. Press the VOL. UP/DOWN button on the remote
control until the red color level is adjusted to 125 ± 5%
of the white level. (Refer to Fig. 2-5)
7. Receive the color bar pattern. (Audio Video Input)
8. Press the INPUT button on the remote control to set
to the AV mode. Then perform the above adjustments
2~6.
White 0%
White 100%
2-18: PIN CUSHION (PCC)
1. Receive the color bar pattern.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Adjust the VR402 until the right and left vertical line
becomes straight.
"A"
Fig. 2-4
0%
100%
Red Level
Fig. 2-5