Sharp ER-A850 (serv.man2) Service Manual ▷ View online
CHAPTER 4. ER-A850/A880
DIAGNOSTICS SPECIFICATIONS
DIAGNOSTICS SPECIFICATIONS
CONTENTS
1. General .......................................................................................... 10
2. System Configuration .................................................................... 10
2-1.
Service Test System........................................................... 10
2-2.
Board Test System ............................................................. 10
2-3.
Process Test System ......................................................... 10
3. Service-man Diagnostics............................................................... 10
3-1.
Loading Diagnostics ........................................................... 10
3-2.
Execution of Diagnostics.................................................... 10
3-3.
RAM Diagnostics................................................................ 11
1) D-RAM Check .............................................................. 11
2) Standard RAM Disk Check ........................................... 11
3) ER-03MB Check ........................................................... 11
4) ER-04MB Check ........................................................... 12
1) D-RAM Check .............................................................. 11
2) Standard RAM Disk Check ........................................... 11
3) ER-03MB Check ........................................................... 11
4) ER-04MB Check ........................................................... 12
3-4.
ROM Diagnostics................................................................ 12
1) System ROM Check ..................................................... 12
2) BIOS ROM Check......................................................... 13
1) System ROM Check ..................................................... 12
2) BIOS ROM Check......................................................... 13
3-5.
Real Time Clock & CMOS RAM Diagnostics .................... 13
1) Real Time Clock Check ................................................ 13
2) CMOS RAM Check ...................................................... 13
1) Real Time Clock Check ................................................ 13
2) CMOS RAM Check ...................................................... 13
3-6.
POS Keyboard Diagnostics................................................ 13
1) ER-A880 Keyboard Diagnostics ................................... 14
2) ER-A850 Keyboard Diagnostics ................................... 14
1) ER-A880 Keyboard Diagnostics ................................... 14
2) ER-A850 Keyboard Diagnostics ................................... 14
3-7.
Clerk Key Diagnostics ........................................................ 14
1) Clerk Key Check .......................................................... 14
1) Clerk Key Check .......................................................... 14
3-8.
Printer Diagnostics ............................................................. 14
1) LPT1 Loop Check ......................................................... 14
2) LPT2 Loop Check ......................................................... 15
3) LPT3 Loop Check ......................................................... 16
4) LPT1 Print Check.......................................................... 16
5) LPT2 Print Check.......................................................... 17
6) LPT3 Print Check.......................................................... 17
1) LPT1 Loop Check ......................................................... 14
2) LPT2 Loop Check ......................................................... 15
3) LPT3 Loop Check ......................................................... 16
4) LPT1 Print Check.......................................................... 16
5) LPT2 Print Check.......................................................... 17
6) LPT3 Print Check.......................................................... 17
3-9.
Serial I/O Diagnostics ......................................................... 17
1) COM1 Check ................................................................ 18
2) COM2 Check ................................................................ 18
3) COM3 Check ................................................................ 18
4) COM4 Check ................................................................ 18
5) COM5 Check ................................................................ 18
6) COM6 Check ................................................................ 18
1) COM1 Check ................................................................ 18
2) COM2 Check ................................................................ 18
3) COM3 Check ................................................................ 18
4) COM4 Check ................................................................ 18
5) COM5 Check ................................................................ 18
6) COM6 Check ................................................................ 18
3-10. Liquid Crystal Display Diagnostics..................................... 18
1) Liquid Crystal Display Check ....................................... 18
3-11. Rear Display Diagnostics ................................................... 19
1) Rear Display Check ...................................................... 19
3-12. SHARP Retail Network Diagnostics................................... 19
1) SRN Self Check ............................................................ 20
2) SRN Flag Send Check.................................................. 20
3) SRN Data Send Check ................................................. 20
4) Data Transmission Check ............................................ 21
2) SRN Flag Send Check.................................................. 20
3) SRN Data Send Check ................................................. 20
4) Data Transmission Check ............................................ 21
3-13. Magnetic Card Reader Diagnostics ...................................22
1) Magnetic Card Reader Check ......................................22
3-14. System Switch Diagnostics ................................................22
1) System Switch Check ...................................................22
3-15. Drawer Diagnostics ............................................................22
1) Drawer 1 Check ............................................................23
2) Drawer 2 Check ............................................................23
3) Drawer 3 Check ...........................................................23
4) Drawer 4 Check ............................................................23
2) Drawer 2 Check ............................................................23
3) Drawer 3 Check ...........................................................23
4) Drawer 4 Check ............................................................23
4. Board Test Diagnostics..................................................................23
4-1.
Execution of Diagnostics ....................................................23
4-2.
Sequential Diagnostics .......................................................23
1) Sequential Check ..........................................................23
1) Sequential Check ..........................................................23
4-3.
Radiation Measuring Diagnostics.......................................25
1) Master Machine Check Contents .................................25
2) Satellite Machine Check Contents................................26
1) Master Machine Check Contents .................................25
2) Satellite Machine Check Contents................................26
4-4.
Temperature Rise Test Diagnostics...................................26
1) Temperature Rise Test Contents .................................26
1) Temperature Rise Test Contents .................................26
4-5.
RAM Diagnostics ................................................................26
4-6.
ROM Diagnostics................................................................26
4-7.
Real Time Clock & CMOS RAM Diagnostics.....................26
4-8.
POS Keyboard Diagnostics................................................26
4-9.
Clerk Key Diagnostics ........................................................26
4-10. Printer diagnostics ..............................................................26
4-11. Serial I/O Diagnostics .........................................................27
4-12. Liquid Crystal Display Diagnostics .....................................27
4-13. Real Display diagnostics ....................................................27
4-14. SHARP Retail Network Diagnostics...................................27
4-15. Magnetic Card Reader Diagnostics ...................................27
4-16. System Switch Diagnostics ................................................27
4-17. Drawer Diagnostics ............................................................27
4-11. Serial I/O Diagnostics .........................................................27
4-12. Liquid Crystal Display Diagnostics .....................................27
4-13. Real Display diagnostics ....................................................27
4-14. SHARP Retail Network Diagnostics...................................27
4-15. Magnetic Card Reader Diagnostics ...................................27
4-16. System Switch Diagnostics ................................................27
4-17. Drawer Diagnostics ............................................................27
5. Process Test Diagnostics ..............................................................27
5-1.
Execution of Diagnostics ....................................................27
5-2.
Sequential Diagnostics .......................................................27
1) Sequential Check ..........................................................27
1) Sequential Check ..........................................................27
5-3.
RAM Diagnostics ................................................................28
5-4.
ROM Diagnostics................................................................28
5-5.
Real Time Clock & CMOS RAM Diagnostics.....................28
5-6.
POS Keyboard Diagnostics................................................28
5-7.
Clerk Key Diagnostics ........................................................28
5-8.
Serial I/O Port diagnostics ..................................................28
5-9.
Liquid Crystal Display Diagnostics .....................................28
5-10. System Switch Diagnostics ................................................28
– 9 –
1. General
This diagnostics program is used for simplified check of the ER-
A850/A880 operations in the board test, the process test and servic-
ing. It is composed of three programs as shown below.
The board test diagnostics is supplied as the test ROM. The process
test diagnostics is built in the system ROM. The service-man diagnos-
tics is supplied in a floppy disk as an execution object. The programs
are loaded from the PC to the ER-A850/A880 by using the application
program loader (hereinafter referred to as "APLD") program. All diag-
nostics programs are executed by supplying a command with the AT
key after initiating the MS-DOS.
A850/A880 operations in the board test, the process test and servic-
ing. It is composed of three programs as shown below.
The board test diagnostics is supplied as the test ROM. The process
test diagnostics is built in the system ROM. The service-man diagnos-
tics is supplied in a floppy disk as an execution object. The programs
are loaded from the PC to the ER-A850/A880 by using the application
program loader (hereinafter referred to as "APLD") program. All diag-
nostics programs are executed by supplying a command with the AT
key after initiating the MS-DOS.
2. System Configuration
2-1. Service Test System
Connect the ER-A850/A880 body and the PC with an RS-232C cross
cable. Connect the ER-A850/A880 with the AT key board. For con-
nection between the ER-A850/A880 and the PC, refer to the Opera-
tion Manual of the ER-A850/A880 application program loader.
cable. Connect the ER-A850/A880 with the AT key board. For con-
nection between the ER-A850/A880 and the PC, refer to the Opera-
tion Manual of the ER-A850/A880 application program loader.
Fig. 2.1 Service test connection
2-2. Board Test System
•
ER-A850/A880 body
•
6-pin small DIN type AT keyboard
•
Test ROM (The test ROM is inserted to the system Rom position
on the main PWB.)
on the main PWB.)
Fig. 2-2 Board test connection
2-3. Process Test System
•
ER-A850/A880 body
•
6-pin small DIN type AT keyboard
Fig. 2-3 Process test connection
3. Service-man Diagnostics
3-1. Loading Diagnostics
Set the ER-A850/A880 DIP switch as shown in Fig. 3-1, and supply
power to the ER-A850/A880. Use APLD to load the service-man diag-
nostics after saving data in the RAM disk. For loading and saving
data, refer to the operation manual of the ER-A850/A880 application
program loader.
power to the ER-A850/A880. Use APLD to load the service-man diag-
nostics after saving data in the RAM disk. For loading and saving
data, refer to the operation manual of the ER-A850/A880 application
program loader.
Fig. 3-1 DIP switch setting for loading diagnostics program
Note:
•
Before operating the system switch, be sure to turn off the
power.
power.
•
Before executing the service-man diagnostics, be sure to
save date in the RAM disk. If not, the data may be de-
stroyed.
save date in the RAM disk. If not, the data may be de-
stroyed.
•
To load the service-man diagnostics, RAM disk area of min.
25KByte is required.
25KByte is required.
3-2. Execution of Diagnostics
Set the ER-A850/A880 DIP switch as shown in Fig. 3-2, and supply
power to the ER-A850/A880.
power to the ER-A850/A880.
Fig. 3-2 DIP switch setting for executing diagnostic program
After initiating the MS-DOS, execute "SRV.EXE" by entering as fol-
lows with the AT key:
lows with the AT key:
C>SRV
↵
"C>" is the DOS prompt.
The diagnostics program is initiated to display the menu screen as
shown below. The highlighted cursor is moved with the cursor up key
(
The diagnostics program is initiated to display the menu screen as
shown below. The highlighted cursor is moved with the cursor up key
(
↑
) and the cursor down key (
↓
) of the AT key. Move the cursor to the
diagnostics item to be executed, then press the Enter key, and the
selected individual diagnostics program will be executed. After com-
pletion of an individual diagnostics program, the display returns to the
menu screen. To exit from the diagnostics mode, press the Esc key,
and the display will return to the DOS prompt.
selected individual diagnostics program will be executed. After com-
pletion of an individual diagnostics program, the display returns to the
menu screen. To exit from the diagnostics mode, press the Esc key,
and the display will return to the DOS prompt.
PC
ER-A850/A880
RS-232C
AT key
The AT key connector of
the ER-A850/A880is of
16-pin small DIN type.
the ER-A850/A880is of
16-pin small DIN type.
AT key
ER-A850/A880
(Built-in test ROM)
The test ROM is inserted
for test instead of the
system ROM.
for test instead of the
system ROM.
AT key
ER-A850/A880
SW1
ON
OFF
OFF
OFF
OFF
ON
SW2
SW3
SW4
SW1
ON
OFF
OFF
OFF
OFF
SW2
SW3
SW4
OFF
– 10 –
ER-A880/A850 Service-man Diagnostics V1.0A
RAM Diagnostics
ROM Diagnostics
Real time clock & CMOS RAM Diagnostics
POS Keyboard Diagnostics
Clerk Key Diagnostics
Printer Diagnostics
Serial I/O Diagnostics
LCD (Liquid Crystal Display) Diagnostics
Rear Display Diagnostics
SRN (SHARP Retail Network) Diagnostics
MCR (Magnetic Card Reader) Diagnostics
System Switch Diagnostics
Drawer Diagnostics
After completion of diagnostics, use APLD to load previously saved
data to the RAM disk. For loading procedure, refer to the ER-
A850/A880 application program loader.
data to the RAM disk. For loading procedure, refer to the ER-
A850/A880 application program loader.
3-3. RAM diagnostics
The RAM diagnostics is used to test the standard memory, the ex-
tended memory, and the RAM disk.
The menu shown below is displayed. The highlighted cursor is moved
with the cursor up key (
tended memory, and the RAM disk.
The menu shown below is displayed. The highlighted cursor is moved
with the cursor up key (
↑
) and the cursor down key (
↓
) of the AT key.
Move the highlighted cursor to the diagnostics item to be executed,
then press the Enter key, and selected individual diagnostics program
will be executed. After completion of the individual diagnostics pro-
gram, the display returns to the menu screen of the RAM diagnostics.
Pressing the Esc key returns to the service-man diagnostics menu
screen.
then press the Enter key, and selected individual diagnostics program
will be executed. After completion of the individual diagnostics pro-
gram, the display returns to the menu screen of the RAM diagnostics.
Pressing the Esc key returns to the service-man diagnostics menu
screen.
RAM Diagnostics
D-RAM Check
Standard RAM Disk Check
ER-03MB Check
ER-04MB Check
1) D-RAM Check
1
Check contents
All memory areas are tested with every 64KB as a unit in the
following procedures:
All memory areas are tested with every 64KB as a unit in the
following procedures:
i.
Test data 5555H is written to the whole test areas.
ii. Test data and read data are compared with every word as a
unit. If it is O.K., test data AAAAH is written to the test area. iii.
Test data and read data are compared with every word as a
unit. If it is O.K., test data 5555H is written to the test area.
Test data and read data are compared with every word as a
unit. If it is O.K., test data 5555H is written to the test area.
iv. Test data 0000H is written to the whole test areas.
v.
Test data and read data are compared with every word as a
unit. If it is O.K., test data FFFFH is written to the test area.
unit. If it is O.K., test data FFFFH is written to the test area.
vi. Test data and read data are compared with every word as a
unit. If it is O.K., test data 0000H is written to the test area.
The standard memory test is performed in the following proce-
dures:
The standard memory test is performed in the following proce-
dures:
i.
Address areas from 040000H to 09FFFFH are checked with
every 64KB as a unit.
every 64KB as a unit.
ii.
Data in address 000000H to 03FFFFH is copied to address
400000H or later, and data in address 000000H to 03FFFFH
is checked with every 64KB as a unit.
The extended memory area test is performed by reading the
set up value and testing up to the area with every 64KB as a
unit.
400000H or later, and data in address 000000H to 03FFFFH
is checked with every 64KB as a unit.
The extended memory area test is performed by reading the
set up value and testing up to the area with every 64KB as a
unit.
2
Display
D-RAM Check
Main memory size
: 640KB
PASS !! (or ERROR !!)
Extended memory size
: xxxxKB
PASS !! (or ERROR !!)
Error Address xxxxxxH Write Data xxxxH Read Data xxxxH
The extended memory size shows the set up value. The error
address and bits are displayed only when there is an error. (If
there is no error, no display is given.)
address and bits are displayed only when there is an error. (If
there is no error, no display is given.)
3
Exiting
After displaying the check result, pressing the Esc key will exit
from this check mode.
After displaying the check result, pressing the Esc key will exit
from this check mode.
2) Standard RAM Disk Check
1
Check contents
The standard RAM disk area (600000H
The standard RAM disk area (600000H
∼
6FFFFFH) is checked
with every 64KB test area as a unit. The test procedures are as
follows:
follows:
i.
Test area data is saved into the main memory.
ii.
Test data 5555H is written to the whole test areas.
iii.
Test data and read data are compared with every word as a
unit. If it is O.K., test data AAAAH is written to the test area.
unit. If it is O.K., test data AAAAH is written to the test area.
iv. Test data and read data are compared with every word as a
unit. If it is O.K., test data 5555H is written to the test area.
v.
Test data 0000H is written to the whole test areas.
vi. Test data and read data are compared with every word as a
unit. If it is O.K., test data FFFFH is written to the test area.
vii. Test data and read data are compared with every word as a
unit. If it is O.K., test data 0000H is written to the test area.
viii. Write the saved test data into the test area.
When an error occurs during the test, the error address and
data are displayed and the test is terminated.
When a POFF interruption is made during the test, the test
operation is terminated and the saved data is written into the
test area within 50ms.
data are displayed and the test is terminated.
When a POFF interruption is made during the test, the test
operation is terminated and the saved data is written into the
test area within 50ms.
2
Display
Standard RAM Disk Check
Standard RAM Disk size : 1024KB
PASS !! (or ERROR !!)
Error Address xxxxxxH Write Data xxxxH Read Data xxxxH
Error address and bit are displayed only when an error occurs. (If
no error occurs, they are not displayed.)
no error occurs, they are not displayed.)
3
Exiting
After displaying the check result, pressing the Esc key will exit
from this check mode.
After displaying the check result, pressing the Esc key will exit
from this check mode.
3) ER-03MB Check
1
Check contents
The extended RAM disk area (700000H
The extended RAM disk area (700000H
∼
7FFFFFH) is checked
with every 64KB test area as a unit. The test procedures are as
follows:
follows:
i.
55AAH is written into 7FFFFFH.
ii.
7FFFFFH is read and compared with 55AAH. If the both data
are correct, the following test is performed. If not, the display
shows "Extended RAM Disk size : 0KB" and the test is termi-
nated.
are correct, the following test is performed. If not, the display
shows "Extended RAM Disk size : 0KB" and the test is termi-
nated.
iii.
Save the test area data into the main memory.
– 11 –
iv. Test data 5555H is written to the whole test areas.
v.
Test data and read data are compared with every word as a
unit. If it is O.K., test data AAAAH is written to the test area.
unit. If it is O.K., test data AAAAH is written to the test area.
vi. Test data and read data are compared with every word as a
unit. If it is O.K., test data 5555H is written to the test area.
vii. Test data 0000H is written to the whole test areas.
viii. Test data and read data are compared with every word as a
unit. If it is O.K., test data FFFFH is written to the test area.
ix. Test data and read data are compared with every word as a
unit. If it is O.K., test data 0000H is written to the test area.
x.
Write the saved test data into the test area.
When an error occurs during the test, the error address and data
are displayed and the test is terminated.
When a POFF interruption is made during the test, the test opera-
tion should be terminated and the saved data should be written
into the test area within 50ms.
are displayed and the test is terminated.
When a POFF interruption is made during the test, the test opera-
tion should be terminated and the saved data should be written
into the test area within 50ms.
2
Display
ER-03MB Check
Extended RAM Disk size : 1024KB
PASS !! (or ERROR !!)
Error Address xxxxxxH Write Data xxxxH Read Data xxxxH
Error address and bit are displayed only when an error occurs. (If
no error occurs, they are not displayed.)
no error occurs, they are not displayed.)
3
Exiting
After displaying the check result, pressing the Esc key will exit
from this check mode.
After displaying the check result, pressing the Esc key will exit
from this check mode.
4) ER-04MB Check
1
Check contents
The extended RAM disk area (700000H
The extended RAM disk area (700000H
∼
8FFFFFH) is checked
with every 64KB test area as a unit. The test procedures are as
follows:
follows:
i.
55AAH is written into 8FFFFFH.
ii.
7FFFFFH is read and compared with 55AAH. If the both data
are correct, the following test is performed. If not, the display
shows "Extended RAM Disk size : 0KB" and the test is termi-
nated.
are correct, the following test is performed. If not, the display
shows "Extended RAM Disk size : 0KB" and the test is termi-
nated.
iii.
The test area data is saved into the main memory.
iv. Test data 5555H is written to the whole test areas.
v.
Test data and read data are compared with every word as a
unit. If it is O.K., test data AAAAH is written to the test area.
unit. If it is O.K., test data AAAAH is written to the test area.
vi. Test data and read data are compared with every word as a
unit. If it is O.K., test data 5555H is written to the test area.
vii. Test data 0000H is written to the whole test areas.
viii. Test data and read data are compared with every word as a
unit. If it is O.K., test data FFFFH is written to the test area.
ix. Test data and read data are compared with every word as a
unit. If it is O.K., test data 0000H is written to the test area.
x.
The saved test data is written into the test area.
When an error occurs during the test, the error address and data
are displayed and the test is terminated.
When a POFF interruption is made during the test, the test opera-
tion is terminated and the saved data is written into the test area
within 50ms.
are displayed and the test is terminated.
When a POFF interruption is made during the test, the test opera-
tion is terminated and the saved data is written into the test area
within 50ms.
2
Display
ER-04MB Check
Extended RAM Disk size : 2048KB
PASS !! (or ERROR !!)
Error Address xxxxxxH Write Data xxxxH Read Data xxxxH
Error address and bit are displayed only when an error occurs. (If
no error occurs, they are not displayed.)
no error occurs, they are not displayed.)
3
Exiting
After displaying the check result, pressing the Esc key will exit
from this check mode.
After displaying the check result, pressing the Esc key will exit
from this check mode.
3-4. ROM Diagnostics
This diagnostics is used to check the system ROM.
The display shows the following menu. The highlighted cursor is
moved with the cursor up key (
The display shows the following menu. The highlighted cursor is
moved with the cursor up key (
↑
) and the cursor down key (
↓
) of the
AT key. Move the cursor to the diagnostics item to be executed, then
press the Enter key, and the selected individual diagnostics program
will be executed. After completion of an individual diagnostics pro-
gram, the display returns to the menu screen. To exit from the diag-
nostics mode, press the Esc key, and the display will return to the
service-man diagnostics menu screen.
press the Enter key, and the selected individual diagnostics program
will be executed. After completion of an individual diagnostics pro-
gram, the display returns to the menu screen. To exit from the diag-
nostics mode, press the Esc key, and the display will return to the
service-man diagnostics menu screen.
ROM Diagnostics
System ROM Check
BIOS ROM Check
1) System ROM Check
1
Check contents
Address E00FC3H is read and checked: if the data is 32H, the
system ROM capacity is 2MB; if the data is 34H, it is 4M. For the
other cases, an error display is given.
In the case of a 2MB ROM, the system ROM area (E00000H
Address E00FC3H is read and checked: if the data is 32H, the
system ROM capacity is 2MB; if the data is 34H, it is 4M. For the
other cases, an error display is given.
In the case of a 2MB ROM, the system ROM area (E00000H
∼
E3FFFFH) is added with every byte as a unit. If the lower two
digits of the result of addition is FFH, it is judged as normal.
In the case of a 4MB ROM, the system ROM area (E00000H
digits of the result of addition is FFH, it is judged as normal.
In the case of a 4MB ROM, the system ROM area (E00000H
∼
E7FFFFH) is added with every byte as a unit. If the lower two
digits of the result of addition is FFH, it is judged as normal.
Data of 10 bytes at address E00FC0H
digits of the result of addition is FFH, it is judged as normal.
Data of 10 bytes at address E00FC0H
∼
E00FC9H where the
ROM version is stored is displayed in ASCII code characters.
2
Display
System ROM Check
System ROM Sum Check
: PASS !! (or ERROR !!)
ROM Version
: 27020RXX1A
3
Exiting
After displaying the check result, pressing the Esc key will exit
from this check mode.
After displaying the check result, pressing the Esc key will exit
from this check mode.
– 12 –
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