Screen Adjustment; Picture Adjustment; Color Adjustment - Sharp 27DV-S100 Service Manual

Ë SERVICE ADJUSTMENT

Screen Adjustment

1. Select a good local channel.
2. Enter the service mode and select the 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 "MUTE" and adjust
the data value to "1", this turns off the luminance
signal (Y-mute).
4. Adjust the master screen control until raster darkens
to the point where raster is barely seen.
5. 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.
6. Select the 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. Select a good local channel.
2. Enter the service mode and select the 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 the service adjustment data of "G
GAIN" and "B GAIN" until a good grey scale with
normal whites is obtained.
4. Select the service adjustment item "COLOR" and
adjust data to obtain normal color level.

Picture Adjustment

1. Select a good local channel.
2. Make sure the customer picture control is maximum.
3. Enter the service mode and select the service
adjustment item "PICTURE".
4. Adjust the data value to achieve normal contrast
range.
Tint Adjustment
1. Select a good local channel.
2. Set customer tint control to center of it's range.
3. Enter the service mode and select the service
adjustment item "TINT".
4. Adjust "TINT" data value to obtain normal flesh tones.

Color Adjustment

1. Select a good local channel.
2. Make sure the customer color control is set to center
position .
3. Enter the service mode and select the service
adjustment item "COLOR".
4. Adjust "COLOR" data value to obtain normal color
level.
Brightness Adjustment
1. Select a good local channel.
2. Make sure the customer brightness control is set to
center position.
3. Enter the service mode and select the service
adjustment item "BRIGHT".
4. Adjust "BRIGHT" data value to obtain normal
brightness level.
Vertical Phase Adjustment
1. Receive a good local channel.
2. Enter the service mode and select "V-POSITION".
3. Adjust data value so that picture is approximate
center.
Vertical-Size Adjustment
1. Receive a good local channel.
2. Enter the service mode and select "V-AMP".
3. While observing the top and bottom of the screen,
adjust the data value to proper vertical size.
Side Pincushion Adjustment
1. Receive a good local channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select "E-W PARABOLA".
4. Adjust the data so that the outermost line on the
screen be straight.
Corner Distortion Adjustment
1. Receive a good local channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select "E-W CORNER".
4. Adjust the data so that the vertical lines should be
straight.
Trapezoidal Distortion Adjustment
1. Receive a good local channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select "TRAPEZIUM".
4. Adjust the data so that the leftmost and rightmost
vertical lines are parallel to each other.
Horizontal Position Adjustment
1. Receive a good local channel or crosshatch pattern
signal.
2. Set to standard setting mode.
3. Enter the service mode and select "H-POSITION".
4. Adjust so that the left and right overscans are equal
to each other.
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27DV-S100
27DV-CS10