Sharp 25MR15J Service Manual page 8

25MR15J
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 ADJUSTMENT
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. (Refer to
Figure 3.)
4. Adjust "S18" data value so that text box is positioned
in the center of the screen.
SERVICE INSTRUCTIONS
Figure 3.
8
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. Adjust data value to "00" for normal viewing.
SHARPNESS AND AUDIO BALANCE
ADJUSTMENT
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustments "S05" for sharpness and "S17" for audio
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.
OTHER ADJUSTMENT
1. Enter the service mode.
2. Adjust the following data values as listed below.
S16 "00" TRAP
S20 "23" ENERGY SAVE OFFSET
S21 "7A" TIMER
S23 "00" TUNER SETUP