Durabrand DBTV1901 Service Manual page 58

2-6: HORIZONTAL PHASE
1. Receive the center cross signal from the Pattern
Generator.
2. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (05) on the remote control to
select "H PHASE".
3. Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
right and left becomes minimum.
2-7: VERTICAL SIZE
NOTE: Adjust after performing adjustments in section 2-6
1. Receive the crosshatch signal from the Pattern
Generator.
2. 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 VOL. UP/DOWN button on the remote control
3.
until the rectangle on the center of the screen becomes
square.
4. Receive a broadcast and check if the picture is normal.
2-8: VERTICAL SHIFT
NOTE: Adjust after performing adjustments in section 2-7
1. Receive the crosshatch signal from the Pattern
Generator.
2.
Activate the adjustment mode display of Fig. 1-1
and press the channel button (07) on the remote control to
select "V SHIFT".
3. Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the notch
of the shadow mask.
ELECTRICAL ADJUSTMENTS
Fig. 2-1
0%
120%
100%
Fig. 2-2
2-9: OSD HORIZONTAL
1. Activate the adjustment mode display of Fig. 1-1.
2. Press the VOL. UP/DOWN button on the remote
control until the difference of A and B becomes
minimum. (Refer to Fig. 2-3)
A
2-10: VIF VCO
1. Place the set with Aging Test for more than 10 minutes.
Receive an 80dB monoscope pattern.
2.
3. Connect the digital voltmeter between the pin 5 of
CP601 and the GND.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "VIF VCO".
5. Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5V.
2-11: SUB CONTRAST MANUAL
1. Receive an 70db the color bar pattern. (RF Input)
2. Activate the adjustment mode display of Fig. 1-1
press the channel button (14) on the remote control to
select "CONTRAST".
3. Press the VOL. UP/DOWN button on the remote control
until the contrast step No. becomes "108".
4. Receive an 70db the color bar pattern. (Audio Video Input)
5. Press the INPUT SELECT button on the remote control
to set to the AV mode. Then perform the above
adjustments 2, 3.
2-12: SUB BRIGHTNESS
1.
Receive an 70db the black pattern*. (RF Input)
2.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRIGHTNESS".
3.
Press the VOL. UP/DOWN button on the remote control
unit the screen begin to shine.
4.
Receive an 70db the black pattern*. (Audio Video Input)
5.
Press the TV/AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2, 3.
*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.
D1-2
TV
00 OSD 15
B
Fig. 2-3