13VT-K100/150
13VT-CK10
15
SERVICE ADJUSTMENT
VCO Adjustment
1. Connect a digital voltmeter between pin (44) of IC401
and ground.
2. Select a good local channel.
3. Enter the service mode. select adjustment item PIF-
VCO and data value "40".
4. Adjust the VCO coil L202 so that the digital voltmeter
reads 2.5 volts.
5. Adjustment is complete, remove the voltmeter, return
to "normal" mode.
RF AGC Adjustment
1. Have unit receive a good local channel.
2. Enter the service mode and select service adjustment
item "RF-AGC".
3. Set the data value to point where no noise or beat
appears.
4. Select another channel to confirm that no noise or
beat appears.
Note 1: You will have to come out of the service
mode to select another channel.
Note 2: Setting the data to "0" will produce a black
raster.
Screen Adjustment
1. Select a good local channel.
2. Enter the service mode and select service adjustment
item "COLOR" and set the data value to "0" to set
the color level to minimum. You may skip this step,
if you selected a B/W picture or monoscope pattern.
3. Select service adjustment item "Y-MUTE" and adjust
the data value to "1", this turns off the luminance
signal (Y-mute).
4. Select service adjustment item "BRIGHT" and set
the value to "32".
5. Adjust the master screen cotrol untill raster darkens
to the point where raster is barely seen.
6. Adjust service adjustments item "R-CUT OFF" red
"G-CUT OFF" green and "B-CUT OFF" blue to obtain
a good grey scale with normal whites at low
brightness level.
7. Select service adjustment item "MUTE" and reset
data to "0". Select service adjustment item "COLOR"
and reset data to obtain normal color level.
White Balance Adjustment
1. Have unit receive a good local channel.
2. Enter the service mode. Select service adjustment
item "COLOR" and set to "0" (minimum color).
"COLOR" does not have to be adjusted if you
selected a B/W picture or monoscope pattern.
3. Alternately adjust service adjustment data of "G
GAIN" and "B GAIN" untill a good grey scale with
normal whites is obtained.
4. Select service adjustment item "COLOR" and adjust
data to obtain normal color level.
Picture Adjustment
1. Have unit receive a good local channel.
2. Make sure the customer picture control is set to
maximum.
3. Enter the service mode and select service
adjustment item "PICTURE".
4. Adjust the data value to achieve normal contrast
range.
Tint Adjustment
1. Have unit receive a good local channel.
2. Set customer tint control to center of it’s range.
3. Enter the service mode and select service
adjustment item "TINT".
4. Adjust "TINT" data value to obtain normal flesh tones.
Color Adjustment
1. Have unit receive a good local channel.
2. Make sure the customer color control is set to center
position .
3. Enter the service mode and select service
adjustment item "COLOR".
4. Adjust "COLOR" data value to obtain normal color
level.
Brightness Adjustment
1. Have unit receive a good local channel.
2. Make sure the customer brightness control is set to
center position.
3. Enter the service mode and select service
adjustment item "BRIGHT".
4. Adjust "BRIGHT" data value to obtain normal
brightness level.
