Read Sharp XE-A113 (serv.man3) Service Manual online
XE-A113 (V)
TEST FUNCTION
– 14 –
10) INTERNAL RAM TEST
1 Key operation
2 Test procedure
The test program checks internal RAM (20Kbyte) of the CPU.
The contents of the memory are lost after this test.
RAM (00400H - 053FFH area) is tested in the following procedure.
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.
If an error occurs in each step, the error print is made. When no
error occurs, the following addresses are sequentially checked.
<Addresses to be checked>
01000H, 01001H, 01002H, 01004H, 01008H
01010H, 01020H, 01040H, 01080H,
01100H, 01200H, 01400H, 01800H,
02000H, 04000H
3 Display
4 Check that
Check the end print.
5 End of testing
The test will automatically be terminated and the printer prints as
follows.
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) 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.
flash ROM (C0000H - FFFFFH) is correct.
The lower two digits of the checksum should be 10H.
3 Display
4 Check that
Check the end print.
5 End of testing
The test will automatically be terminated and the printer prints as
follows.
follows.
12) AD CONVERSION PORT TEST
1 Key operation
2 Test procedure
The AD value of each AD conversion port is sequentially displayed
for every 1 sec.
for every 1 sec.
3 Display
4 Check that
Check that the AD value is within the reference range.
5 End of testing
When any key is pressed, the test is terminated and the AD value at
the terminating point is printed.
the terminating point is printed.
13) WINDING MOTOR TEST
1 Key operation
2 Test procedure
The winding spool motor is rotated for 2 sec.
3 Display
4 Check that
The motor of the winding spool is rotated for 2 sec.
5 End of testing
The test will automatically be terminated and the printer prints as
follows.
RCPT/PO
1
2
1
OP display :
POPUP display:
1 2 1
121
When the
test ends normally :
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 :
test ends normally :
140
RAM ERROR X *****h
When an error occurs:
ROM
********
********
ROM
********
********
RCPT/PO
1
6
0
(*)
X
=
1: Head temperature X
=
2: Head voltage X
=
3: Battery voltage
(*) * * * *
=
A /D value
OP display :
POPUP display:
1 6 0
X
* * * *
End print:
160
HEAD TEMP
HEAD VOLTAGE
BATTERY VOLTAGE
***
***
***
RCPT/PO
1
7
3
OP display :
POPUP display:
1 7 3
.
173
End print:
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