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
Generator.select "BRIGHT CENT".
2.Using the remote control, set the brightness and5.Press the VOL. +/- button on the remote control until
contrast to normal position.the screen begin to shine.
3.Activate the adjustment mode display of Fig. 1-1 and6Receive the PAL black pattern*. (Audio Video Input)
7.Set to the AV mode. Then perform the above
press the channel button (08) on the remote control toadjustments 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 and1.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
select "H POSI (60)".2.Press the VOL. +/- button on the remote control until
8.Press the VOL. +/- button on the remote control untilthe contrast step No. becomes "35".
3.Receive a broadcast and check if the picture is normal.
the SHIFT quantity of the OVER SCAN on right and left4.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 Pattern1.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
contrast to normal position.and color to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and3.Connect the oscilloscope to TP022.
press the channel button (11) on the remote control to4.Activate the adjustment mode display of Fig. 1-1 and
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 remote5.Adjust the VOLTS RANGE VARIABLE knob of the
control so that the Up/Down OVER SCAN Quantityoscilloscope until the range between white 100% and
becomes equal to the Right/Left OVER SCAN Quantity.
5. Receive a broadcast and check if the picture is normal.0% is set to 5 scales on the screen of the oscilloscope.
6. Receive the monoscope pattern of NTSC. (Audio Video6.Press the VOL. +/- button on the remote control until
the red color level is adjusted to 85 ? 10% of the white
Input)level. (Refer to Fig. 2-1)
7. Using the remote control, set the brightness and7.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
press the channel button (12) on the remote control toadjustments 2~6.
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 LINEARITY85%
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.
Fig. 2-1
4. Adjust the VR420 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.
D-2 |
ACEC
TOSHIBA
