Toshiba 20A46C Service Manual - Page 16
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2-12: COLOR CENT
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 oscilloscope to TP022.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (19) on the remote control to
select "COLOR CENT".
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 120 ± 5% of the
white level. (Refer to Fig. 2-3)
7.
Receive the video color bar pattern. (Audio Video Input)
8.
Set to the AV mode. Then perform the above
adjustments 2~6.
white 100%
2-13: 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 oscilloscope to TP024.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "TINT".
5.
Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes as straight line.
(Refer to Fig. 2-4)
6.
Receive the video color bar pattern. (Audio Video Input)
7.
Set to the AV mode. Then perform the above adjustments
2~5.
"A"
"B"
ELECTRICAL ADJUSTMENTS
2-14: Confirmation of Fixed Value (step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
NO.
04
07
14
15
16
18
20
21
23
24
28
29
120%
Fig. 2-3
Fig. 2-4
D-3
FUNCTION
RF
AV
H VCO
04
04
V.SHIFT
02
02
BRIGHT MAX
170
170
BRIGHT MIN
60
60
CONT CENT
40
40
CONT MIN
20
20
COLOR MAX
80
80
COLOR MIN
00
00
SHARPNESS
40
40
FM.LVL
00
00
TEST MONO
59
59
TEST STEREO
59
59