Sharp XE-A301 Service Manual page 13

4 End of testing
When any key is pressed, the date and time are printed and the test
mode will be terminated.
107 X X X X X X
year
month
8) DRAWER 1 OPEN & SENSOR TEST
1 Key operation
110 3
RCPT/PO
2 Test procedure
OP display
D R A W E R
X : O = DRAWER OPENED
C = DRAWER CLOSED
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
RCPT/PO
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
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.
Addresses to be checked:
10000H , 10001H , 10002H , 10004H , 10008H ,
10010H , 10020H , 10040H , 10080H ,
10100H , 10200H , 10400H , 10800H ,
11000H , 12000H , 14000H , 18000H ,
20000H
40000H , 40001H , 40002H , 40004H , 40008H ,
40010H , 40020H , 40040H , 40080H ,
40100H , 40200H , 40400H , 40800H ,
X X X X X X
hour
min.
day sec.
1 P G M
5FFFFH area) is
XE-A301V DIAGNOSTIC PROGRAM
41000H , 42000H , 44000H , 48000H ,
50000H
OP display
3 Check:
A) The completion print.
4 End of testing
The program ends after printing as follows:
When the test ends normally:
When the test end abnormally:
X
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
RCPT/PO
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
in turns.
Addresses to be checked:
01000H , 01001H , 01002H , 01004H , 01008H
01010H , 01020H , 01040H , 01080H ,
01100H , 01200H , 01400H , 01800H ,
02000H
OP display
3 Check:
The completion print.
4 End of testing
The test program ends after printing.
When the test ends normally:
When the test ends abnormally:
If an error occurs, the printer outputs the error message and the
address where the error has occurred in the area *****.
– 12 –
R A M
1 2 0
Ex – ~ –
*****
x = 1:Data error
x = 2:Address error
C P U R A M
1 2 1
Ex – ~ –
*****
x = 1:Data error
x = 2:Address error
P G M
120
120
P G M
121
121