Sharp 25N-M100 Service Manual page 13

Sub-Brightness Adjustment
1. Receive 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 "S04".
4. Adjust "S04" data value to obtain normal brightness
level.
Vertical-Size Adjustments
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "S09".
3. While observing the top and bottom of the screen,
adjust "S09" data value to proper vertical size.
Vertical Phase Adjustment
1. Enter the service mode and select the service
adjustment "S06".
2. Adjust data value to "00".
Note: This must be set "00" when changed data retrace
line will appear.
Horizontal Position Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "S07".
3. Adjust "S07" data value so that picture is centered.
Caption Position Adjustment (Horizontal)
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "S18".
3. A black text box appears on the screen. (see Figure
C below)
4. Adjust "S18" data value so that text box is positioned
in the center of the screen.
Figure C.
3.58MHz Trap Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "S16".
3. This is a two position adjustment, "00" is ON, "01" is
OFF.
4. Models should be adjusted as follows.
MODEL
25N-M100/180
25N-S100/180
CN25M10
CN25S18
CN25S20
Sharpness and Audio Balance Adjust-
ments
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustments "S05" for sharpness and "S17" for
balance.
» Sharpness adjustment
3. Adjust data value to "28"(center of data range) for
sharpness adjustment.
» Audio balance adjustment
4. Adjust data value to "20"(center of data range) for
Audio balance adjustment.
Energy save offset Adjustment
1. Enter the service mode and select the service
adjustment "S20".
2. Adjust data value to "23".
Note : This position is used to preset the level for the
energy save function.
Other Adjustments
1. Enter the service mode.
2. Adjust the following data values as listed below.
S21 "03" DDE OFFSET
S22 "00" OSD SETUP
S23 "00" TUNER SETUP
13
25N-M100/M180/S100/S180
CN25M10,CN25S18/20
"S16"
00
01
00
00
01