26SL41M, 26SL71M
29SL81M
SERVICE ADJUSTMENT
VCO AdjustmentWhite Balance Adjustment
1. Connect a digital voltmeter between pin (44) of IC2011. Receive a good local channel.
and ground.2. Enter the service mode and select the service
2. Receive a good local channel.adjustment "S03" and set to "00" (minimum
3. Enter the service mode and select the servicecolor)(Record original data code under adjustment
adjustment "S10"."S03" before changing). "S03" does not have to be
4. Adjust the data so that digital voltmeter reads 2.2Vadjusted, if you selected a B/W picture or monoscope.
5. Adjustment is completed, remove the voltmeterpattern.,
return to "normal" mode.3. Alternately adjust the service adjustment data of "S14"
and "S15" until a good grey scale with normal whites
RF AGC Adjustmentis obtained.
4. Select the service adjustment "S03" and adjust data
1. Receive a good local channel.
2. Enter the service mode and select the serviceto obtain normal color level.
adjustment "S08".Sub-Picture Adjustment
3. Set the data value to point where no noise or beat
appears.1. Receive a good local channel.
4. Select another channel to confirm that no noise or2. Make sure the customer picture control is set to
beat appears.maximum.
Note 1:You will have to come out of the service3. Enter the service mode and select the service
mode to select another channel.adjustment "S01".
Note 2:Setting the data to "00" will produce a black4. Adjust the data value to achieve normal contrast
raster.range.
Screen AdjustmentSub-Tint Adjustment
1. Connect a oscilloscope between TP854 and GND1. Receive a good local channel.
on the CRT Unit.2. Set customer tint control to center of it's range.
2. Receive a good local channel.3. Enter the service mode and select the service
3. Enter the service mode and select the serviceadjustment "S02".
adjustment "S03" and set the data value to "00" to4. Adjust "S02" data value to obtain normal flesh tones.
set the color level to minimum. (Record original data
code under adjustment "S03" before changing) Sub-Color AdjustmentYou
may skip this step, if you selected a B/W picture or1. Receive a good local channel.
monoscope pattern.
4. Select the service adjustment "S19" and adjust the2. Make sure the customer color control is set to center
data value to "01", this turn off the luminance signalposition.
3. Enter the service mode and select service adjustment
(Y-mute).
5. Select the service adjustment "S04" and adjust data"S03".
value to obtain 2.35 V on the oscilloscope screen.4. Adjust "S03" data value to obtain normal color level.
2.35V
GND
6. Adjust the master screen control until the raster
darkens to the point where raster is barely seen.
7. Adjust the service adjustments "S11" red, "S12" green
and "S13" blue to obtain a good grey scale with
normal whites at low brightness level.
8. Select the service adjustment "S19" and reset data
to "00". Select the service adjustment "S03" and reset
data to obtain normal color level.
9. Remove oscilloscope and reset the master screen
control to obtain normal brightness range.
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ACEC
