13N-M100B/150B
CN13M10B
� SERVICE ADJUSTMENT
Note:Before making the service adjustment, make the6. Adjust the master screen control untill the raster
bus data settings.
darkens to the point where raster is barely seen.
+B Adjustment7. Adjust the service adjustment "S05" red, "S06" green,
1. Receive a good local channel."S07" blue to obtain a good grey scale with normal
2. Select VIDEO ADJUSTMENT RESET on the menuwhite at low brightness level.
to get the video reset.8. Select the service a adjustment "S03" and reset data
3. Connect a DC voltmeter between the +B line (at SWto "00". Select the service adjustment "S12" and reset
transformer) of R611 and the ground terminal.data to obtain normal color level.
4. Adjust R738 so that the voltmeter should read9. Remove probe and reset the master screen control
130?0.5V.to obtain normal brightness range.
White Balance Adjustment.
RF AGC Adjustment
1. Receive a good local channel.
1. Receive a good local channel.2. Select the service adjustment "S12" and set the data
2. Enter the service mode signal category and select
the service adjustment "S01".value to "00" to set the color level to the minimun.
3. Set the data value to point where no noise or beatYou may skip this step, if you selected a B/W picture
or monoscope.
appears.3. Alternately adjust the service adjustment data of "S08"
4. Select another channel to confirm that no noise or
beat appears.and "S09" untill a good grey scale with normal white
is obtained.
Note: You have to exit the service mode first to4. Select the service adjustment "S12" and reset data
select another channel.
to obtain normal color level.
Video Level (TV Det Video Level)Sub-Picture Adjustment
Adjustment
1. Receive a good local channel.
1. Receive a good local channel.2. Make sure the customer picture control is set to
2. Enter the service mode signal category and select
the service adjustment "S02".maximum.
3. Enter the service mode and select the service
3. Set the data value to "02" first, then adjust the data inadjustment "S10".
ranges 02 ?2 step to obtain a normal contrast level.4. Adjust the data value to achieve normal contrast
range.
Screen adjustment
1. Connect to oscilloscope probe between TP855 andSub-Tint Adjustment
ground of the CRT unit.1. Receive a good local channel.
2. Receive a good local channel.2. Set the customer tint control to the center of itOs range.
3. Enter the service mode Signal category and set the
service adjustment "S04" to step 60. Then select the3. Enter the service mode and select the service
adjustment "S11".
service adjustment "S12" and set the data value to4. Adjust "S11" data value to obtain normal fresh tones.
"00" to set the color level to the minimum level. (record
the original data first). You may skip this step, if you
Sub-Color Adjustment
selected a B/W picture or monoscope pattern. 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 data2. Make sure the customer color control is set to center
value to "01" to turn off the luminance signal (Yposition.-mute).
5. Select the service adjustment "S13" and adjust the3. Enter the service mode and select the service
data value to obtain 2.40 volts as shown in Figure B.adjustment "S12".
4. Adjust "S12" data value to obtain normal color level.
Sub-Brightness Adjustment
2.40 Vdc1. Receive a good local channel.
2. Make sure the customer brightness control is set to
center position.
GND3. Enter the service mode and select the service
adjustment "S13".
Figure B: WAVEFORM FOR SCREEN ADJUSTMENT4. Adjust "S13" data value to obtain normal brightness
level.
11 |
ACEC
SHARP
