Toshiba 27D46 Service Manual page 17

2-5: BRIGHT CENT
1. Receive the monoscope pattern. (RF Input)
2. Set the screen mode to FULL.
3. Using the remote control, set the brightness and contrast
to normal position.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (17) on the remote control to
select "BRI CENT".
5. Press the VOL. UP/DOWN button on the remote control
until the white 2.7% is starting to be visible
6. Receive the monoscope pattern. (Audio Video Input)
7. Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
2~5.
8. Receive the monoscope pattern.
9. Press the TV/VIDEO button on the remote control to set
to the CS mode.Then perform the above adjustments
2~5.
2-6: CONTRAST MAX
1. Receive an over 70dB color bar 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 (21) on the remote control
to select "CONT.MAX".
4. Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "90".
5. Receive a broadcast and check if the picture is normal.
6. Receive the color bar pattern. (Audio Video Input)
7. Press the TV/VIDEO button on the remote control to
set to the AV mode. Then perform the above
adjustments 2~5.
8. Receive a broadcast and check if the picture is normal.
Receive the monoscope pattern.
9. Press the TV/VIDEO button on the remote control to set to
the CS mode.Then perform the above adjustments 2~5.
2-7: TINT
1. Receive the color bar pattern. (RF Input)
2. Using the remote control, set the brightness and 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 (26) 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. 2-1)
6. Receive the color bar pattern. (Audio Video Input)
7. Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
2~5. (Refer to Fig. 2-1)
8. Receive the color bar pattern.
9. Press the TV/VIDEO button on the remote control to set
to the CS mode.Then perform the above adjustments
2~5.
10. Receive the digital color bar pattern.
11. Press the TV/VIDEO button on the remote control to set
to the DIGITAL mode.Then perform the above
adjustments 2~5 (Refer to Fig. 2-1).
ELECTRICAL ADJUSTMENTS
D-2
2-8: 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.
Activate the adjustment mode display of Fig. 1-1 and
4.
press the channel button (23) on the remote control to
select "COL.CENT".
Adjust the VOLTS RANGE VARIABLE knob of the
5.
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 110
white level. (Refer to Fig. 2-2)
7. Receive the color bar pattern. (Audio Video Input)
8. Press the AV mode. Then perform the above
adjustments 2~6. (Refer to Fig. 2-2)
9. Receive the color bar pattern.
10. Press the TV/VIDEO button on the remote control to set
to the CS mode.Then perform the above adjustments
2~6.
11. Receive the digital color bar pattern.
12. Press the TV/VIDEO button on the remote control to set
to the DIGITAL mode.
Adjust the VOLTS RANGE VARIABLE knob of the
13.
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
Press the VOL. UP/DOWN button on the remote control
14.
until the red color level is adjusted to 100
white level. (Refer to Fig. 2-3)
white 100%
white 100%
ìAî
Fig. 2-1
5% of the
5% of the
110%
Fig. 2-2
100%
Fig. 2-3