Read Sharp UP-X300 (serv.man45) Service Manual online
UP-X300V
DIagnostics Specifications
3 – 10
When [ESC] key of 106 keyboard is pressed twice continuously, the dis-
play returns to the menu of the test (1) above.
play returns to the menu of the test (1) above.
4-4-6. Error contents
(1) 106 keyboard check
• Parity error
(This error occurs when the serial data from the keyboard is of even parity.)
• Key recognizer error
(This error occurs when the entered key code cannot be recognized.)
4-5. VGA I/F & LCD
4-5-1. General
This test is used to check whether the VGA I/F section and the LCD
panel function normally or not. Selection of aging/error stop/1 pass can
be made. The test execution time is also displayed.
panel function normally or not. Selection of aging/error stop/1 pass can
be made. The test execution time is also displayed.
*Since the VGA test is executed for all display area, when the VGA test
item is selected, the display mode is switched to the all display mode.
4-5-2. Required Tools to be used
• UP-X500 series main unit diag execution media x 1
4-5-3. Test item
The purposes of this test are as follows:
4-5-4. Test contents (for service repair)
(1) Test pattern display test
The LCD display test is executed in the following sequence:
(2) LCD backlight ON/OFF test
This test is used to check ON/OFF of the LCD backlight.
The test procedures are as follows:
(3) LCD attribute test
This test is used to check 18-color display and 8-color reverse and
blinking display.
(4) VRAM test
This test is used to execute the VRAM (1MB) memory verify test.
(5) LCD brightness test
(6) Error table
The errors occurred in the previous tests (1) ~ (5) are displayed for each
test item.
4-5-5. Test menu
(1) VGA I/F & LCD test menu
On the above display, use [
2 ] and [ 4 ] keys to select a test item. When
[ENTER] key is pressed, the test is executed. When [ESC] key is
pressed, the display returns to the initial menu.
(2) Test pattern display test execution display
Refer to 5-5-4. (1).
(3) LCD backlight ON/OFF execution display
ON/OFF of the backlight is repeated in a certain frequency.
When [SPACE] key is pressed during this test, the test is interrupted.
When [SPACE] key is pressed during interruption, the test is resumed.
When [ESC] key is pressed, the test is terminated and the display
returns to the initial menu.
• Test pattern display
• LCD backlight ON/OFF test
• LCD attribute test
• VRAM test
• Brightness test
• Error table
Test for
1 pass
1 pass
All dot Black
(Check that all the display is black.)
(Check that all the display is black.)
All dot Black
(Check that all the display is black.)
(Check that all the display is black.)
All-dot white
(Check that all the display is white.)
(Check that all the display is white.)
8-dot unit check pattern display
8-dot unit
8-dot unit
Peripheral 1-dot display
Test for 1 pass
Backlight ON
4
Backlight OFF
LCD & VGA Diagnostics
Test Pattern display
LCD Reverse Display test
LCD Back-Light ON/OFF test
LCD Attribute test
:Move ENTER:Select ESC:Exit
Error table
VRAM test
LCD Back-Light ON/OFF Test
ON
(OFF)
SPACE:Stop
ESC:Exit
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