Toshiba 20AS22 Service Manual - Page 13
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2-6: HORIZONTAL PHASE
1.
Receive the monoscope pattern.
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 (05) on the remote control to
select "H.PHAS".
4.
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 SHIFT
Receive the monoscope pattern.
1.
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.SFT".
4.
Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the notch
of the shadow mask.
2-8: VERTICAL SIZE
1.
Receive the monoscope pattern.
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 (06) on the remote control to
select "V.SIZE".
4.
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%.
5.
Receive a broadcast and check if the picture is normal.
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. 2-1)
00 OSD
A
2-10: BRIGHTNESS MANUAL
1.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRI.CENT".
2.
Press the VOL. UP/DOWN button on the remote
control until the brightness step No. becomes "130".
3.
Receive a broadcast and check if the picture is normal.
4.
Press the TV/VIDEO button on the remote to set to the
AV mode. Then perform the above adjustment 2~3.
ELECTRICAL ADJUSTMENTS
TV
15
B
Fig. 2-1
2-11: SUB TINT/SUB COLOR
1.
Receive the color bar pattern. (RF Input)
2.
Connect the oscilloscope to TP023.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "TINT".
4.
Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes as straight line.
(Refer to Fig. 2-2)
5.
Connect the oscilloscope to TP022.
6.
Press the channel button (19) on the remote control to
select "COL. CENT".
7.
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.
8.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 120 ± 10% of the
white level. (Refer to Fig. 2-3)
9.
Receive the color bar pattern. (Audio Video Input)
10.
Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
2~8.
White 0%
White 100%
2-12: SUB CONTRAST
1.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (17) on the remote control to
select "CONT.MAX".
2.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "67".
3.
Receive a broadcast and check if the picture is normal.
4.
Press the TV/VIDEO button on the remote to set to the
AV mode. Then perform the above adjustment 2~3.
"A"
Fig. 2-2
0%
100%
Red Level
Fig. 2-3