14MN10
� SERVICE ADJUSTMENT
RF AGC AdjustmentWhite Balance Adjustment.
1. Receive a good local channel.1. Receive a good local channel.
2. Enter the service mode signal category and select2. Select the service adjustment "S12" and set the data
the service adjustment "S01".value to "00" to set the color level to the minimun. You
3. Set the data value to point where no noise or beatmay skip this step, if you selected a B/W picture or
appears.monoscope.
4. Select another channel to confirm that no noise or3. Alternately adjust the service adjustment data of
beat appears."S08" and "S09" untill a good grey scale with normal
Note: You have to exit the service mode first towhite is obtained.
select another channel.4. Select the service adjustment "S12" and reset data
to obtain normal color level.
Video Level (TV Det Video Level)
AdjustmentSub-Picture Adjustment
1. Receive a good local channel.1. Receive a good local channel.
2. Enter the service mode signal category and select2. Make sure the customer picture control is set to
the service adjustment "S02".maximum.
3. Set the data value to "02" first, then adjust the data in3. Enter the service mode and select the service
ranges 02 ?2 step to obtain a normal contrast leadjustment "S10".vel.
4. Adjust the data value to achieve normal contrast
range.
Screen adjustment
1. Connect to oscilloscope probe between TP855 and
Sub-Tint Adjustment
ground of the CRT unit.
2. Receive a good local channel.1. Receive a good local channel.
3. Enter the service mode Signal category and set the2. Set the customer tint control to the center of itOs range.
service adjustment "S04" to step 60. Then select the3. Enter the service mode and select the service
service adjustment "S12" and set the data value toadjustment "S11".
"00" to set the color level to the minimum le4.vel.Adjust "S11" data v (recordalue to obtain normal fresh tones.
the original data first). You may skip this step, if you
selected a B/W picture or monoscope patterSub-Color Adjustmentn. Set
also the "S05/S06/S07" data to minimum level.
1. Receive a good local channel.
4. Select the service adjustment "S03" and set the data
2. Make sure the customer color control is set to center
value to "01" to turn off the luminance signal (Y-mute).
position.
5. Select the service adjustment "S13" and adjust the
3. Enter the service mode and select the service
data value to obtain 2.40 volts as shoFigure Bwn in .
adjustment "S12".
6. Adjust the master screen control untill the raster
4. Adjust "S12" data value to obtain normal color level.
darkens to the point where raster is barely seen.
7. Adjust the service adjustment "S05" red, "S06" green,
Sub-Brightness Adjustment
"S07" blue to obtain a good grey scale with normal
white at low brightness level.1. Receive a good local channel.
8. Select the service a adjustment "S03" and reset data2. Make sure the customer brightness control is set to
to "00". Select the service adjustment "S12" and resetcenter position.
data to obtain normal color level.3. Enter the service mode and select the service
9. Remove probe and reset the master screen controladjustment "S13".
to obtain normal brightness range.4. Adjust "S13" data value to obtain normal brightness
level.
2.40 Vdc
GND
Figure B: WAVEFORM FOR SCREEN ADJUSTMENT
9 |
ACEC
SHARP
