ELECTRICAL ADJUSTMENTS
2-6: FOCUS2-10: BRIGHT CENT
1. Receive an 80dB monoscope pattern.1.Receive the PAL black pattern*. (RF Input)
2. Turn the Focus Volume fully counterclockwise once.2.Using the remote control, set the brightness and
3. Adjust the Focus Volume until picture is distinct.contrast to normal position.
3.Place the set with Aging Test for more than 15 minutes.
2-7: HORIZONTAL POSITION4.Activate the adjustment mode display of Fig. 1-1 and
press the channel button (17) on the remote control to
1.Receive the monoscope pattern from the Pattern
select "BRIGHT CENT".
Generator.
5.Press the VOL. +/- button on the remote control until
2.Using the remote control, set the brightness and
the screen begin to shine.
contrast to normal position.
6Receive the PAL black pattern*. (Audio Video Input)
3.Activate the adjustment mode display of Fig. 1-1 and
7.Set to the AV mode. Then perform the above
press the channel button (08) on the remote control to
adjustments 2~5.
select "H POSI (50)".
4.Press the VOL. +/- button on the remote control until*The Black Pattern means the whole black raster signal.
the SHIFT quantity of the OVER SCAN on right and leftSelect the "RASTER" of the pattern generator, set to
becomes minimum.the OFF position for each R, G and B.
5.Receive the monoscope pattern of NTSC. (Audio Video
Input)2-11: CONTRAST CENT
6.Using the remote control, set the brightness and
1.Activate the adjustment mode display of Fig. 1-1 and
contrast to normal position.
press the channel button (22) on the remote control to
7.Activate the adjustment mode display of Fig. 1-1 and
select "CONTRAST CENT".
press the channel button (39) on the remote control to
2.Press the VOL. +/- button on the remote control until
select "H POSI (60)".
the contrast step No. becomes "30".
8.Press the VOL. +/- button on the remote control until
3.Receive a broadcast and check if the picture is normal.
the SHIFT quantity of the OVER SCAN on right and left
4.Set to the AV mode. Then perform the above
becomes minimum.
adjustments 1~3.
2-8: VERTICAL SIZE
2-12: COLOR CENT
1. Receive the monoscope pattern from the Pattern
1.Receive the PAL color bar pattern. (RF Input)
Generator.
2.Using the remote control, set the brightness, contrast
2. Using the remote control, set the brightness and
and color to normal position.
contrast to normal position.
3.Connect the oscilloscope to TP022.
3. Activate the adjustment mode display of Fig. 1-1 and
4.Activate the adjustment mode display of Fig. 1-1 and
press the channel button (11) on the remote control to
press the channel button (25) on the remote control to
select "V SIZE (50)".
select "COLOR CENT".
4. Adjust by using the VOL. +/- button on the remote
5.Adjust the VOLTS RANGE VARIABLE knob of the
control so that the Up/Down OVER SCAN Quantity
oscilloscope until the range between white 100% and
becomes equal to the Right/Left OVER SCAN Quantity.
0% is set to 5 scales on the screen of the oscilloscope.
5. Receive a broadcast and check if the picture is normal.
6.Press the VOL. +/- button on the remote control until
6. Receive the monoscope pattern of NTSC. (Audio Video
the red color level is adjusted to 100 ? 10% of the
Input)
white level. (Refer to Fig. 2-1)
7. Using the remote control, set the brightness and
7.Receive the PAL color bar pattern. (Audio Video Input)
contrast to normal position.
8.Set to the AV mode. Then perform the above
8. Activate the adjustment mode display of Fig. 1-1 and
adjustments 2~6.
press the channel button (12) on the remote control to
select "V SIZE (60)".
9. Adjust by using the VOL. +/- button on the remote
control so that the Up/Down OVER SCAN Quantity
becomes equal to the Right/Left OVER SCAN Quantity.
2-9: VERTICAL POSITION/VERTICAL LINEARITY
1. Receive the monoscope pattern from the Pattern100%
Generator.
2. Using the remote control, set the brightness and
contrast to normal position.
3. Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
Fig. 2-1
4. Adjust the VR420 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.
D-2 |
ACEC
