UP-X300 (serv.man45). UP-X300 Service Manual - Sharp EPOS Service Manual (repair manual). Page 17

UP-X300V

DIagnostics Specifications

3 – 11

When any key is pressed, the test is terminated and the display returns
to the menu of the test (1) above.

Enter [SPACE] key to execute the VRAM verify test. (The display is colored in
12 colors.) Check the display and press any key to display the test result.
When [ESC] key is pressed, the display returns to the menu display. 

You can decrease the brightness by pressing the [

1] key and increase it by

pressing the [

3] key.

The display will be returned to the menu screen by pressing the [ESC] key.

This test is used to check the RTC (Real Time Clock).
The following test items are checked:

• RTC test: Calendar time alarm setting test, calendar time alarm data

read test, timer interruption test

• CMOS RAM test: Marching test, sequential write/read-verify test, RAM

display test, RAM battery backup test

•  Other functions: Error information display

•  UP-X500 series main unit diag execution media   x 1

The purpose of this test are as follows:

This test is used to set data of calendar, clock, and alarm for the RTC. 

This test is used to read and display the calendar, clock, and alarm data

of the RTC.

This test is used to execute the update test of the RTC calendar and clock.

The following timer interrupt items are also checked:

• Periodic interrupt

• Alarm interrupt

• Update ended interrupt

(4)CMOS RAM marching test

Caution: During execution of this test, do not turn off the power and do

not reset the unit.

[Test condition setting]

• Error/Stop/Continue/1 pass

[Test contents]

The test pattern data are written into the area (Index address 0Eh - 7Eh) of

the CMOS RAM, and the read/verify test is executed.

After writing the data, the read/verify test is executed only once. 
There are four kinds of data pattern to be written: 00h, FFh, 55h, and AAh.

Writing the above four patterns form 1 pass. 

Before execution of the test, save all the data in the CMOS RAM. After exe-
cution of the test, restore the data to the CMOS RAM.

Caution: During execution of this test, do not turn off the power and do

not reset the unit.

[Test condition setting]

• Error/Stop/Continue/1 pass

[Test contents]

The test pattern data are written into the area (Index address 0Eh -
7Eh) of the CMOS RAM, and the read/verify test is executed.

After writing the data, the read/verify test is executed twice.

Leave an interval (1 sec) between the first check and the second check. 
There are following patterns of data to be written: (Data of 1 pass)

Before execution of the test, save all the data in the RAM. After execu-

tion of the test, restore the data to the RAM.

BLACK
BLUE
GREEN
CYAN
RED
MAGENTA
BROWN
LIGHT-GRAY

DARK-GRAY
LIGHT-BLUE
LIGHT-GREEN
LIGHT-CYAN
LIGHT-RED
LIGHT-MAGENTA
YELLOW
WHITE WHITE

BLACK
BLUE
GREEN
CYAN

RED
MAGENTA
BROWN
LIGHT-GRAY

BLACK
BLUE
GREEN

CYAN
RED
MAGENTA
BROWN
LIGHT-GRAY

Press any key to exit

WHITE

Reverse
display

Blink
display

VRAM test

SPACE:Stop      ESC:Exit

LCD Brightness Test

Low - - - - - - - o - - - - High

Left: BrightnessDown         Right: BrightnessUp          ESC: Exit

Calendar & clock setup test

Calendar & clock read test

Timer interrupt test
CMOS RAM marching test

CMOS RAM sequential write/read-verify test

CMOS RAM display test

CMOS RAM battery backup test
Error table display

Calendar
Clock

Alarm

: Year/Month/Day/Day of week
: Hour/Minute/Second

: Hour/Minute/Second

Test pattern (I) 00h, 01h, 02h, 04h . . .  40h, 80h (9 patterns)

Test pattern (II) FFh, FEh, FDh, FBh . . .  BFh, 7Fn (9 patterns)

Test pattern (III) 00h, 01h, 02h, 03h . . .  FEh, FEh (256 patterns)