Sharp UP-3301 Service Manual page 26

1) Standard RAM Check
1 Check content
For the SRAM of the standard 2MB RAM, the following test is per-
formed. The memory contents will not be changed by this check.
The following processes are performed for the memory address
(600000H~7FFFFFH) to be checked.
PASS1: Memory data save
PASS2: Data "0000H" write
PASS3: Data "0000H" read/compare, data "5555H" write
PASS4: Data "5555H" read/compare, data "AAAAH" write
PASS5: Data "AAAAH" read/compare
PASS6: Memory data writed the saved data
In case of a compare error in the check sequences of
PASS1~PASS6, an error display is displayed. If there is no error at
all, the check is terminated normally.
In addition, the following address check is performed.
In case of an error, an error is made and read/write of the address
where the error occurred is repeated.
Check point address = 600000H, 600001H
600002H, 600004H
600008H, 600010H
600020H, 600040H
600080H, 600100H
600200H, 600400H
600800H, 601000H
602000H, 604000H
608000H, 610000H
620000H, 640000H
680000H, 700000H
2 Display
Standard RAM Check
Standard memory size: 2048KB PASS!! (or ERROR!!)
Error Address xxxxxxH
Write Data xxxxH
Read Data xxxxH
The error address and the bit are displayed only when an error
occurs. (If the error does not occur, the error address will not be dis-
played.)
3 Terminating procedure
After completion of the test, press the Touch panel.
2) UP-S02MB2M Check
1 Check content
The UP-S02MB2M presence check is performed in the following
procedure. The memory contents will not be changed by this check.
• 55AAH is written into 9FFFFEH.
• 9FFFFEH is read and compared with 55AAH. If both data are
correct, the following procedure is performed. If not, "Extended
RAM size: 0KB" is displayed and the test is terminated.
For the UP-S02MB2M, the following check is performed.
The following processes are performed for the check address
(800000H~9FFFFFH).
PASS1: Memory data save
PASS2: Data "0000H" write
PASS3: Data "0000H" read/compare, data "5555H" write
PASS4: Data "5555H" read/compare, data "AAAAH" write
PASS5: Data "AAAAH" read/compare
PASS6: Memory data writes the saved data
In case of a compare error in the check sequences of
PASS1~PASS6, an error display is made. If there is no error at all,
the check is normally terminated.
In addition, the following address check is performed in the above
test sequence.
In case of an error, an error display is made and the read/write
address of the where the error occurred is repeated.
Check point address = 800000H, 800001H
2 Display
UP-S02MB2M Check
Extended RAM : UP-S02MB2M
Extended RAM size : 2048KB
ErrorAddress xxxxxxH
WriteData
ReadData
The error address and the bit are displayed only when the error
occurs. (If the error does not occur, the error address will not be dis-
played.)
3 Terminating procedure
After completion of the test, press the Touch panel.
UP-3301US DIAGNOSTICS SPECIFICATIONS
– 24 –
800002H, 800004H
800008H, 800010H
800020H, 800040H
800080H, 800100H
800200H, 800400H
800800H, 801000H
802000H, 804000H
808000H, 810000H
820000H, 840000H
880000H, 900000H
PASS!!(or ERROR!!)
xxxxH
xxxxH