Durabrand DBTV1901, Service Manual

Page: 30 / 63

D-2
ELECTRICAL ADJUSTMENTS
Fig. 2-1
Fig. 2-2
2-8: OSD HORIZONTAL
1.
2. Activate the adjustment mode display of Fig. 1-1.
Press the VOL. UP/DOWN button on the remote
control until the difference of A and B becomes
minimum. (Refer to Fig. 2-3)
B A
TV
00 OSD 15
Fig. 2-3
2-9: VIF VCO
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 10 minutes.
Receive an 80dB monoscope pattern.
Connect the digital voltmeter between the pin 5 of
CP601 and the GND.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "V.VCO".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5V.
2-5: HORIZONTAL PHASE
1.
2.
3.
Receive the center cross signal from the Pattern
Generator.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (05) on the remote control to
select "H.PHAS".
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
right and left becomes minimum.
2-6: VERTICAL SIZE
Receive an 70dB the color bar pattern.
Activate the adjustment mode display of Fig. 1-1
press the channel button (17) on the remote control
to select "CONT.MAX".
Press the VOL. UP/DOWN button on the remote control
until the contrast step No. becomes "66".
Press the TV/AV button on the remote to set to the
AV mode. Then perform the above adjustment 2, 3. 1.
2.
3.
4.
2-11: SUB CONTRAST MANUAL
Receive an 70dB monoscope pattern.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRI.CENT".
Press the VOL. UP/DOWN button on the remote control
until the screen begin to shine.
Press the TV/AV button on the remote to set to the
AV mode. Then perform the above adjustment 2, 3. 1.
2.
3.
4.
2-10: SUB BRIGHTNESS
1.
2.
3.
4.
Receive the crosshatch signal from the Pattern
Generator.
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
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes 10 ± 2%.
Receive a broadcast and check if the picture is normal.
2-7: VERTICAL SHIFT
1.
2.
3.
Receive the crosshatch signal from the Pattern
Generator.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "V.SFT".
Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the notch
of the shadow mask.
2-12: FOCUS
1.
2.
3. Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
"A"
120%
0%
100%