Sharp XE-A203 - Cash Register Thermal Printing Graphic Logo Creation Service Manual page 15

8) DRAWER OPEN TEST
1 Key operation
1 1 0 RCPT/PO
2 Test procedure
Drawer open.
3 Display
OP display: 1 1 0
POPUP display:
4 Check that
The drawer opens normally.
5 End of testing
The test will automatically be terminated and the printer prints as
follows.
End print:
9) EXTERNAL RAM TEST
1 Key operation
1 2 0 RCPT/PO
2 Test procedure
The standard 128 Kbyte RAM is checked.
The contents of the memory are lost after this test.
RAM (08000H ~ 27FFFH area) is tested in the following procedure.
a) Data in the test area is stored.
b) Write "00H"
c) Read and compare "00H" and then write "55H"
d) Read and compare "55H" and then write "AAH"
e) Read and compare "AAH"
f) Restore stored data.
3 Display
1 2 0
OP display:
POPUP display:
4 End of testing
The test will automatically be terminated and the printer prints as
follows.
When the
test ends normally:
When an error occurs:
(*) x = 1: Data error
(*) When an error occurs, the printer outputs the error message
and then the address where the error has occurred in the
area "*****".
110
120
RAM ERROR X *****h
120
x = 2: Address error
XE-A203U/XE-A203A TEST FUNCTION
10) CPU INTERNAL RAM TEST
1 Key operation
1 2 1 RCPT/PO
2 Test procedure
The test program checks internal RAM (24Kbyte) of the CPU.
The contents of the memory are lost after this test.
RAM (00400H - 053FFH area) is tested in the following procedure.
a) Data in the test area is stored.
b) Write "00H"
c) Read and compare "00H" and then write "55H"
d) Read and compare "55H" and then read "AAH"
e) Read and compare "AAH"
f) Stored data is restored.
3 Display
1 2 1
OP display:
POPUP display:
4 End of testing.
The test will automatically be terminated and the printer prints as
follows.
When the
test ends normally:
When an error occurs:
(*) x = 1: Data error
(*) When an error occurs, the printer outputs the error message
and then the address where the error has occurred in the
area "*****".
11) CPU INTERNAL ROM TEST
1 Key operation
1 4 0 RCPT/PO
2 Test procedure
The test program checks that the checksum of the CPU internal
flash ROM (C0000H - FFFFFH) is correct.
The lower two digits of the checksum should be 10H.
3 Display
1 4 0
OP display:
POPUP display:
4 End of testing
The test will automatically be terminated and the printer prints as
follows.
When the
test ends normally:
When an error occurs:
– 13 –
121
RAM ERROR X *****h
121
x = 2: Address error
140
ROM ********
********
RAM ERROR X *****h
120
ROM ********
********