UP-X200 (serv.man9). Service Manual - Sharp EPOS Service Manual (repair manual). Page 23

UP-X200

Diag PROGram

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The display will disappear when the battery cover is open (ON), and it
will appear again when the battery cover is close (OFF).
This test will be aborted when an error occurs, and press [CL] key to
return to the [Screen 2-4-1] Menu Screen1.
When the test goes to next step, press the [CL] key to return to the
[Screen 2-4-1] Menu Screen 1.
(Hold the [CL] key down until the key is accepted when the test goes to
next step.)

While the [Screen 2-4-1] Menu Screen is displayed, press the [8] key to
execute the Aging Test 2.
This test goes the similar way shown in [2-12. Aging Test]. Both battery
1 and battery 2 will be charged during the execution of the aging test,
and the charging will be stopped when the test is completed.

Press the [9] key to bring up the screen [Screen 2-14-1] Microphone
Recording/Playback Test Screen while the [Screen 2-4-1] Menu Screen
1 is displayed.

In this test, press the [Enter] key first, produce 400 Hz tone and record it
with an internal mic for one second.
After that, press the [Enter] key to playback the recording and return to
the [Screen 2-4-1] Menu Screen.

Press the [1] key to bring up the screen [Screen 2-15-1] LCD VCOM
Voltage Adjustment Screen while the [Screen 2-4-2] Menu Screen 2 is
displayed.

Set the screen in VGA mode to display horizontal gradation and white
stripes on the screen alternately where black color appears at the left-
most part of the screen, the color becomes lighter toward the rightmost
part of the screen, and finally white color appears at the rightmost part
of the screen.
Every time you press the [UP] key, 1 is added to the figure next to value
displayed next to “Value=”. while every time you press the [DN] key, 1 is
subtracted from the value displayed next to “Value=”.
Check screen flicker and press the [Enter] key at the time when there is
the least flicker in the screen so that the value will be written to a flash
ROM, and return to the [Screen 2-4-2] Menu Screen 2.
Any values in the range 0 to 255 of 1-byte data will be outputted to a DA
converter for VCOM setting. 
Press the [CL] key to prevent writing to ROM and return to [Screen 2.4-
2] Menu Screen 2.
When it comes to a flash ROM, you should start to write at the eighth
byte away from the address F0000h.

VCOM adjustment data = "COMAJ xx" (xx indicates 1-byte data that is
set as described above.)
The above hexadecimal number = 43h, 4Dh, 41h, 4Ah, 20h, 20h, 20h, xx
The flash ROM will not be cleared except for the length of the eight
bytes from the address F0000h.
Once the DIAG startup, the figures as described above will be read. In
cases where no set values are written, 100 will be set as a default.

Press the [2] key to bring up the screen [Screen 2-16-1] RTC LCD
VCOM Voltage Adjustment Screen while the [Screen 2-4-2] Menu Screen
2 is displayed.

A current RTC correction value will be shown next to "Value=". 
Every time you press the [UP] key, 1 is added to the figure next to
"Value=", while every time you press the [DN] key, 1 is subtracted from
the figure next to "Value=".
Obtain an optimum accuracy adjustment value with an odometer, press
the [Enter] key to place the value into a flash ROM, and return to
[Screen 2.4-2] Menu Screen 2.
The above value in the range 0 to 255 of 1-byte data will be placed into
a RTC correction register.
Press the [CL] key to prevent writing to ROM and return to [Screen 2-4-
2] Menu Screen 2.
When it comes to a flash ROM, you should start to write at the eighth
byte away from the address F0008h.
RTC rate adjustment data = "RTCV xx" (xx indicates 1-byte data that is
set as described above.)
The above hexadecimal number = 52h, 54h, 43h, 56h, 20h, 20h, 20h, xx
The flash ROM will not be cleared except for the length of the eight
bytes from the address F0008h.
Once the DIAG startup, the figures as described above will be read. In
cases where no set values are written, 17 will be written to a flash ROM
as a default.

Press the [3] key to bring up the screen [Screen 2-17-1] Backlight Test
Screen while the [Screen 2-4-2] Menu Screen 2 is displayed.

The current backlight setting is shown next to "Value=". After the startup
of the DIAG, the light level of a backlight will become the maximum and
indicated as 255.
The function key for [1] through [9] are assigned a specific light level
each so that when one of the function key is pressed, the backlight
lights up at the light level that corresponds to the key. The [1] key illumi-
nates the backlight at the lowest right level whereas the [9] key illumi-
nates the backlight at the highest right level.
Every time you press the [UP] key, 1 is added to the figure next to
"Value=". while every time you press the [DN] key, 1 is subtracted from
the figure next to "Value=" and that is how a light level is set.
Press the [TRG 2] key to toggle BL_C20MA signal on and off. 
Press the [0] key to shut off the backlight.
Press the [CL] key to save the current light level of the backlight and
return to the [Screen 2-4-2] Menu Screen 2.

DIAG Menu 1.00U  (1/3)

1-9. Speaker/MIC

        OK: REC 1s Start 

2-1. LCD Common Adjust

Value=100

CL: Exit         OK: Write

DIAG Menu 1.00U   (2/3)

2-2. RTC Adjust

                     Value= 17
  UP:+1,   DN: -1
                              CL: Exit 

DIAG Menu 1.00U   (2/3)

2-3. Back Light
                     Value= 255
                      20mA ON 
  0: OFF,   1-8, 9: MAX
  UP: +1,  DN: -1
TRG2: 20mA   ON/OFF
                              CL: Exit