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

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XE-A203U/XE-A203A TEST FUNCTION
– 13 –
8) DRAWER OPEN TEST
1 Key operation
2
Test procedure
Drawer open.
3
Display
4
Check that
The drawer opens normally.
5
End of testing
The test will automatically be terminated and the printer prints as
follows.
9) EXTERNAL RAM TEST
1
Key operation
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
4
End of testing
The test will automatically be terminated and the printer prints as
follows.
( * ) x = 1: Data error x = 2: Address error
( * ) When an error occurs, the printer outputs the error message
and then the address where the error has occurred in the
area “
***** ”.
10) CPU INTERNAL RAM TEST
1
Key operation
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
4
End of testing.
The test will automatically be terminated and the printer prints as
follows.
( * ) x = 1: Data error x = 2: Address 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
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
4
End of testing
The test will automatically be terminated and the printer prints as
follows.
RCPT/PO 1 1 0
OP display:
POPUP display:
1 1 0
110
End print:
RCPT/PO 1 2 0
OP display:
POPUP display:
1 2 0
120
When the
test ends normally:
120
RAM ERROR X ***** h
When an error occurs:
RCPT/PO 1 2 1
OP display:
POPUP display:
1 2 1
121
When the
test ends normally:
121
RAM ERROR X ***** h
When an error occurs:
RCPT/PO 1 4 0
OP display:
POPUP display:
1 4 0
140
When the
test ends normally:
120
RAM ERROR X ***** h
When an error occurs:
ROM ********
********
ROM ********
********