Adjustment Procedure - Sharp LC-19SK25U Service Manual

LC-19SK25U/U-W
LC-19SB25U/U-W
LC-19SB15U
LC-19D45U

3. Adjustment procedure

3.1 Plug the AC power cord directly into a wall outlet.
3.2 Calling the adjustment process mode
There are two ways to call this mode.
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Turn on the power and press the "ADJUST PROCESS" key on the remote controller.
∗
For servicing: Hold down the INPUT key and VOL (−) key at once, and turn on the power switch.("K"
appears at the top left of the screen to indicate the inspection process mode.)---Press the CH (s)key
and VOL(−)key at once.(The adjustment process mode screen shows up.)_To quit, turn off the power.
(Or turn off the power switch or turn off the remote controller.)
3.3 Key operation in the adjustment process
Basic operation
Selecting the receiving channels
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Using the CH(r)/(s) keys, turn up and down an actual receiving channel.
Snap press: The channels are turned up and down one by one .
Continuous press: The next receivable channel is searched.
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Various adjustments: The items are adjusted one by one by selecting on the menu screen and using
the cursor key and VOL(+)(−) keys
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With the CURSOR UP/DOWN keys, select an adjustment item.
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Using the MENU key, the adjustment items are selected one after another. When the bottom item on
a page is already selected and the MENU key is pressed, the top item on the next page is selected.
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If any item on a page is selected and the preset key is pressed, the top item on the next page is selected.
Page1- Page2- Page3- Page7- Page9- Page10.....
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If any item on a page is selected and the manual memory key is pressed, the top item on the same
page is selected.
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Using the CURSOR LEFT/RIGHT keys and VOL(+)(−) keys, turn up and down the setting of a
selected item.
Hierarchical shift
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When the ENTER key is pressed on any item other than I2C DATA on page 4,the setting page of the
item shows up.
∗
To quit the setting page, press the front screen key.
3.4 Adjustment
3.4.1 AD TRANSFORM LEVEL Adjustment
3.4.1.1 Input 1080i signal
3.4.1.2 Input 480i signal
3.4.1.3 Input PC XGA signal
1 Input 1080i color bar signal (75%)
Signal generation: LEADER LT448
Signal: color BAR.
Setting: 02: 1080i/59.94(30sf)
H: 33.72 KHz
Note: Please use the third color Bar of LT448 generator
2 Adjusting AUTO GAIN-OFFSET in page 3 of DVP (M2-HD) to RUN .
When "AUTO GAIN-OFFSET OK" appears , this adjustment is complete
1 Input 480i color bar signal (75%)
Signal: color BAR.
Setting: 15: 480i/60
H: 15.73 KHz
Note: Please use the third color Bar of LT448 generator
2 Adjusting AUTO GAIN-OFFSET in page 4 of DVP (M2-SD) to RUN .
When "AUTO GAIN-OFFSET OK" appears , this adjustment is complete
1 Input XGA color bar signal (RGB)
Signal generation: LEADER LT448
V: 29.97Hz
V: 29.97Hz
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