Toshiba 27DF47 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 (29) on the remote control to
select "BRI. CENT".
5. Press the VOL. UP/DOWN button on the remote control
until the white 10% is starting to be visible.
6. Receive the monoscope pattern. (Audio Video Input)
7. Press the INPUT 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 INPUT button on the remote control to set to
the YUV 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 (33) 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 "70".
5. Receive a broadcast and check if the picture is normal.
6. Receive the color bar pattern. (Audio Video Input)
7. Press the INPUT 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 INPUT button on the remote control to set to the
YUV 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, contrast
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 (38) 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 monoscope pattern. (Audio Video Input)
7. Press the INPUT 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 INPUT button on the remote control to set to
the YUV mode.Then perform the above adjustments 2~5.
10. Receive the monoscope pattern.
11. Press the INPUT button on the remote control to set to
the DIGITAL mode.Then perform the above adjustments
2~5.
ELECTRICAL ADJUSTMENTS
D-2
2-8: COLOR CENT
1. Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast, color
2.
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 (35) on the remote control to
select "COL.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.
Press the VOL. UP/DOWN button on the remote control
6.
until the red color level is adjusted to 110 ± 10% of the
white level. (Refer to Fig. 2-2)
7. Receive the video color bar pattern. (Audio Video Input)
8. Press the INPUT button on the remote control to
set to the AV mode. Then perform the above
adjustments 2~6.
9. Receive the video color bar pattern.
10. Press the INPUT button on the remote control to set to the
YUV mode.Then perform the above adjustments 2~6.
11. Receive the video color bar pattern.
12. Press the INPUT button on the remote control to set to the
DIGITAL mode.Then perform the above adjustments 2~6.
white 100%
2-9: HORIZONTAL POSITION
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 (03) on the remote control to
select "H.POSI".
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.
A
Fig. 2-1
110%
Fig. 2-2