Aiwa VX-G143 Service Manual page 28

2-11: VERTICAL SIZE
NOTE: Adjust after performing adjustments in section 2-10.
1. Receive the cross hatch 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 (1) on the remote control to
select "H/V". The Fig. 2-4 appears on the display.
4. Press the channel button (3) on the remote control to
select "V. SIZE 50/60".
5. Press the PLAY or STOP button on the remote control
until the rectangle on the center of the screen becomes
square.
6. Receive a broadcast and check if the picture is normal.
7. Receive the cross hatch signal of NTSC. (Audio Video
Input)
8. Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~5.
2-12: OSD HORIZONTAL
1. Set condition is AV MODE without signal.
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 (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
4. Press the channel button (4) on the remote control to
select "OSD H".
5. Press the PLAY or STOP button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-5)
OSD H
A
2-13: 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 (4) on the remote control to
select "PICTURE". The Fig. 2-6 appears on the display.
4. Press the channel button (1) on the remote control to
select "BRIGHT".
5. Press the PLAY or STOP button on the remote control
until the screen begin to shine.
6. Receive the black pattern*. (Audio Video Input)
7. Press the TV/VCR button on the remote control to set to
the AV mode. Then perform the above adjustments 2~5.
*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.
ELECTRICAL ADJUSTMENTS
[ TV ]
B
Fig. 2-5
1. BRIGHT
2. CONTRAST
3. COLOR
4. TINT
5. SHARPNESS
6. TEXT CONT
7.
8.
"The adjustment items 4 and 6 are not used for this
model."
2-14: SUB COLOR
1. Receive the color bar pattern. (RF Input)
2. Using the remote control, set the brightness, contrast
and color to normal position.
3. Connect the synchro scope to TP801.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-6 appears on the display.
5. Press the channel button (3) on the remote control to
select "COLOR".
6. 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.
7. Press the PLAY or STOP button on the remote control
until the red color level is adjusted to 95% of the white
level. (Refer to Fig. 2-7)
8. Receive the color bar pattern. (Audio Video Input)
9. Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~7.
2-15: SUB CONTRAST
1. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-6 appears on the display.
2. Press the channel button (2) on the remote control to
select "CONTRAST".
3. Press the PLAY or STOP button on the remote control
until the contrast step No. becomes "105"
4. Press the AV button on the remote control to set to the
AV mode.
5. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-6 appears on the display.
6. Press the channel button (2) on the remote control to
select "CONTRAST".
7. Press the PLAY or STOP button on the remote control
until the contrast step No. becomes "112"
D2-3
0. RETURN
White 0%
0%
95%
Red Level
White 100%
Fig. 2-6
Fig. 2-7