ELECTRICAL ADJUSTMENTS
2-6: FOCUS2-10: BRIGHT CENT
1. Receive a 70dB 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
press the channel button (08) on the remote control to7.Set to the AV mode. Then perform the above
select "H POSI (50)".adjustments 2~5.
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 andselect "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 "41".
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.
becomes minimum.
5.Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
2-8: VERTICAL SIZEselect "CONTRAST CENT".
1. Receive the monoscope pattern from the Pattern6.Press the VOL. +/- button on the remote control until
Generator.the contrast step No. becomes "56".
2. Using the remote control, set the brightness and7.Receive a broadcast and check if the picture is normal.
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and2-12: COLOR CENT
press the channel button (11) on the remote control to
1.Receive the PAL color bar pattern. (RF Input)
select "V SIZE (50)".
2.Using the remote control, set the brightness, contrast
4. Adjust by using the VOL. +/- button on the remoteand color to normal position.
control so that the Up/Down OVER SCAN Quantity
3.Connect the oscilloscope to TP022.
becomes equal to the Right/Left OVER SCAN Quantity.
4.Activate the adjustment mode display of Fig. 1-1 and
5. Receive a broadcast and check if the picture is normal.
press the channel button (25) on the remote control to
6. Receive the monoscope pattern of NTSC. (Audio Video
select "COLOR CENT".
Input)
5.Adjust the VOLTS RANGE VARIABLE knob of the
7. Using the remote control, set the brightness and
oscilloscope until the range between white 100% and
contrast to normal position.0% is set to 5 scales on the screen of the oscilloscope.
8. Activate the adjustment mode display of Fig. 1-1 and
6.Press the VOL. +/- button on the remote control until
press the channel button (12) on the remote control to
the red color level is adjusted to 90 ? 10% of the white
select "V SIZE (60)".
level. (Refer to Fig. 2-1)
9. Adjust by using the VOL. +/- button on the remote
7.Receive the PAL color bar pattern. (Audio Video Input)
control so that the Up/Down OVER SCAN Quantity
8.Set to the AV mode. Then perform the above
becomes equal to the Right/Left OVER SCAN Quantity.
adjustments 2~6.
2-9: VERTICAL POSITION/VERTICAL LINEARITY
1. Receive the monoscope pattern from the Pattern
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.100%
90%
4. Adjust the VR420 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.
Fig. 2-1
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