Read Sharp XE-A301 (serv.man3) Service Manual online
XE-A301V
DIAGNOSTIC PROGRAM
– 12 –
4
End of testing
When any key is pressed, the date and time are printed and the test
mode will be terminated.
8) DRAWER 1 OPEN & SENSOR TEST
1
Key operation
110
3
2
Test procedure
3
Check that:
A) The drawer 1 opens normally.
B) The sensor correctly indicates the status of the drawer 1.
* On the XE-A401, “C” (CLOSED) is always displayed.
4
End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
1 1 0
9)
EXTERNAL RAM TEST
1
Key operation
120
3
2
Test procedure
The standard 256 Kbyte RAM is checked.
The contents of memory must be stored before and after this test.
RAM (08000H
27FFFH area and 40000H
5FFFFH area) is
tested in the following procedure:
a) Store data in the test areas
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
If an error occurs at a step, the error is printed.
If any error does not occur, the following addresses are checked in
turns.
turns.
Addresses to be checked:
10000H , 10001H , 10002H , 10004H , 10008H ,
10010H , 10020H , 10040H , 10080H ,
10100H , 10200H , 10400H , 10800H ,
11000H , 12000H , 14000H , 18000H ,
11000H , 12000H , 14000H , 18000H ,
20000H
40000H , 40001H , 40002H , 40004H , 40008H ,
40010H , 40020H , 40040H , 40080H ,
40010H , 40020H , 40040H , 40080H ,
40100H , 40200H , 40400H , 40800H ,
41000H , 42000H , 44000H , 48000H ,
50000H
50000H
3
Check:
A) The completion print.
4
End of testing
The program ends after printing as follows:
When an error occurs, the printer outputs the error message and the
address where the error has occurred in the area
*****
.
10) CPU INTERNAL RAM TEST
1
Key operation
121
3
2
Test procedure
The test program tests internal RAM (10 Kbytes) of the CPU.
The contents of memory must be stored before and after this test.
RAM (00400H ~ 02BFFH area) is tested in the following procedure.
a) Store data in the test area.
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
If an error occurs at a step, the error is printed.
If any error does not occur, the following addresses are checked
If any error does not occur, the following addresses are checked
in turns.
Addresses to be checked:
01000H , 01001H , 01002H , 01004H , 01008H
01010H , 01020H , 01040H , 01080H ,
01100H , 01200H , 01400H , 01800H ,
01100H , 01200H , 01400H , 01800H ,
02000H
3
Check:
The completion print.
4
End of testing
If an error occurs, the printer outputs the error message and the
address where the error has occurred in the area
*****
.
107
X X X X X X
X X X X X X
year
month
day
hour
min.
sec.
RCPT/PO
D R A W E R
P G M
X
OP display
X : O = DRAWER OPENED
C = DRAWER CLOSED
1
RCPT/PO
When the test ends normally:
120
When the test end abnormally:
Ex – ~ –
120
*****
x = 1:Data error
x = 2:Address error
The test program ends after printing.
When the test ends normally:
121
When the test ends abnormally:
Ex – ~ –
121
*****
x = 1:Data error
x = 2:Address error
R A M
P G M
OP display
1 2 0
RCPT/PO
R A M
C P U
P G M
OP display
1 2 1
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