General; System Configuration; Service Diagnostics; Service Diagnostics Getting Started - Sharp UP-5300 Service Manual

5) Depress the F8 function key located on the AT keyboard and
start the UP-5300 without executing the "CONFIG.SYS" and
the "AUTOEXEC.BAT". The UP-5300 will go to the A:\>
prompt.
6) To select the drive that of diagnostics program, type "C:\"
followed by the ENTER key.
7) At the "C:\" prompt , type "SRV" followed by the ENTER key
to start the serviceman's diagnostic program.

1. General

This diagnostic program is used to check the PWB's, the process,
and the machine of UP-5300 series in a simplified manner.
This test program is supplied with floppy disks.

2. System configuration

The system requires the UP-5300, and an AT keyboard for diagnostic
operations.

3. Service diagnostics

3-1. Service diagnostics getting started

Getting started:
Execute "SRV.BAT" by entering the command with the AT keyboard
as follows:
C:\> SRV ↵
"C:\>" is the DOS prompt. (Used by the F-ROM disk based on the
settings of the system switches.)
* Do not load any device drivers when using this program.
* To operate other applications after performing this program, reboot
the machine.

3-2. Selection menu

The diagnostics menu is started and the following menu is displayed.
The highlighted cursor is moved by the cursor keys (UP ↑ and DOWN
↓) of the AT keyboard. Move the cursor to the desired item, and press
the Enter key to execute the selected diagnostics program. When the
selected diagnostics program is completed, the display returns to the
menu screen by pressing the ESC key. Select "Diagnostics End" and
press the Enter key to terminate the diagnostics.
SHARP PC-POS System Diagnostic Series
Diagnostics for Service

RAM Diagnostics

ROM Diagnostics
Real time clock & CMOS RAM Diagnostics
Touch Panel Diagnostics
Clerk Key Diagnostics
Printer Diagnostics
Serial I/O Diagnostics
LCD (Liquid Crystal Display) Diagnostics
MCR (Magnetic Card Reader) Diagnostics
System Switch Diagnostics
Drawer Diagnostics
Option Display Diagnostics
IDE I/F & Controller Diagnostics
FDD Diagnostics
FAN&LCD ON/OFF Diagnostics
Power Hold Diagnostic
Diagnostics End
3-3. RAM Diagnostics
This program is used to test the standard memory, the extension
memory, and the RAM disk.
When this program is selected, the following menu is displayed.
The highlighted cursor is moved by the cursor keys (UP ↑ and DOWN
↓) of the AT keyboard. Move the cursor to the desired item, and press
the Enter key to execute the selected diagnostics program.
Version 1.00B
I
When the selected diagnostics program is completed, Press the ESC
key to return to the RAM menu screen. Pressing the Esc key again
returns to the service diagnostics menu.
RAM Diagnostics

D-RAM Check

Standard RAM Disk Check

Option RAM Disk Check
1) D-RAM Check
1
Checking content
All memory areas are checked in units of 64KB. The checking
procedures are as follows:
i. Test data 5555H is written to all the test areas.
ii. Test data and read data are compared by each word, If it is
O.K., test data AAAAH is written to the test area.
iii. Test data and read data are compared by each word, If it is
O.K., test data 5555H is written to the test area.
iv. Test data 0000H is written to all the test areas.
v. Test data and read data are compared by each word, If it is
O.K., test data FFFFH is written to the test area.
vi. Test data and read data are compared by each word, If it is
O.K., test data 0000H is written to the test area.
When an error occurs during the test, the error address and data
are displayed and the test is stopped.
For the extension memory test, the value set in the setup of read
and test and is made to the area in increments of 64KB.
2
Display
D-RAM Check
Main memory size : 640KB
Extended memory size : xxxxKB
Error Address xxxxxxH
When testing the extension memory size, the value set in the
setup is displayed. The error address and the error data are dis-
played only when an error occurs. (When no errors occur, they are
not displayed.)
3
Terminating method
After completion of the test, press Esc key to terminate the test to
return to the RAM diagnostics menu.
2) Standard RAM Disk Check
1
Checking content
When testing the standard RAM disk area (BANK 000H ∼ 03FH),
each test area of bank size 16KB is checked. The bank base
address of RAM is set to 0D4000H and after. The checking proce-
dures are as follows:
i. Write different data to the following address by word method.
After the completion of writing, a BANK 03FH 0D4000H data
read verify check is made. (Data in the written area is saved
in the main memory.) If it is OK, the following test is executed.
In case of an error, the error display is made and the test is
terminated.
Write address
BANK BFH (extension) 0D4000H
BANK 7FH (extension) 0D4000H
BANK 3FH (standard) 0D4000H
4 – 2
PASS !!(or ERROR !!)
PASS !!(or ERROR !!)
Write Data xxxxH Read Data xxxxH
Write data
BF40H
7F80H
3FC0H