Read Sharp LC-15M4E (serv.man2) Service Manual online
11
LC-15M4E
4. Counter bias adjustment
Keep off the video input signal.
Place the specified tool at the center of the screen.
Observe the output of the tool on the oscilloscope screen.
Adjust the “COM BIAS” setting on the adjustment process page 2 so that the peak-to-peak level of the waveform
should be minimum.
Place the specified tool at the center of the screen.
Observe the output of the tool on the oscilloscope screen.
Adjust the “COM BIAS” setting on the adjustment process page 2 so that the peak-to-peak level of the waveform
should be minimum.
5. Other settings
Make the following settings depending on the microprocessor version.
»
Microprocessor version 1.0 (marked at the bottom of adjustment process page 1: 15M4 VER 1.000)
When the EEPROM has been replaced, take the ROM correction procedure (see Attachment 1).
(Putting the words BRIGHTNESS and DARK in their German counterparts on the FEATURE menu.)
(Putting the word DARK in its German counterpart on the BRIGHTNESS CALL display.)
When the EEPROM has been replaced, take the ROM correction procedure (see Attachment 1).
(Putting the words BRIGHTNESS and DARK in their German counterparts on the FEATURE menu.)
(Putting the word DARK in its German counterpart on the BRIGHTNESS CALL display.)
»
Microprocessor versions earlier than 1.0
When the EEPROM has been replaced, take the ROM correction procedure (see Attachment 2) and modify
the adjustment process parameters (see Attachment 3).
(Suppose the unit has been put from the reset to the stop mode and that the main power is turned off. But the
unit fails to get restarted after such a first-time switching-on. This problem is now corrected.)
(Putting the words BRIGHTNESS and DARK in their German counterparts on the FEATURE menu.)
When the EEPROM alone has been initialized, modify the adjustment process parameters (see Attachment 3).
(Making the adjustment process default settings)
When the EEPROM has been replaced, take the ROM correction procedure (see Attachment 2) and modify
the adjustment process parameters (see Attachment 3).
(Suppose the unit has been put from the reset to the stop mode and that the main power is turned off. But the
unit fails to get restarted after such a first-time switching-on. This problem is now corrected.)
(Putting the words BRIGHTNESS and DARK in their German counterparts on the FEATURE menu.)
When the EEPROM alone has been initialized, modify the adjustment process parameters (see Attachment 3).
(Making the adjustment process default settings)
6. Factory settings
Set the product’s input mode, picture quality and other factors to their factory settings.
There are the following two ways.
With the buttons of the set
In the inspection process mode, hold down both the “SELECT
There are the following two ways.
With the buttons of the set
In the inspection process mode, hold down both the “SELECT
'
” and “VOL (+)” buttons of the set until “SETTING
COMPLETE” appears on the screen.
Note: Be careful not to turn off the power, release the above two buttons and press any other buttons until
Note: Be careful not to turn off the power, release the above two buttons and press any other buttons until
“SETTING COMPLETE” appears on the screen.
Changing onscreen display
Inspection process mode
K
E
Factory settings
Setting complete
SETTING COMPLETE
With the adjustment remote controller
Using the adjustment remote controller, make the factory settings. Either of the following remote controllers codes
will do.
Using the adjustment remote controller, make the factory settings. Either of the following remote controllers codes
will do.
Key name
Remote controller code
Factory setting
100000111111110
Factory setting
100000001010110
Calling the inspection process mode
There are the following two ways.
With the keys of the set
Hold down the “MENU” and “AV INPUT” buttons of the set and turn on the power.
With the adjustment remote controller
Use the inspection process buttons.
There are the following two ways.
With the keys of the set
Hold down the “MENU” and “AV INPUT” buttons of the set and turn on the power.
With the adjustment remote controller
Use the inspection process buttons.
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