XE-A202. Service Manual - Sharp ECR Service Manual (repair manual). Page 15

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XE-A202V
TEST FUNCTION
– 14 –
4
End of testing
The program ends after printing.
When the test ends normally.
 120
When the test ends abnormally. Ex- ~ -
 120
*****
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 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. 
If an error occurs at a step, the error is printed.
If an error does not occur, the following addresses are checked.
Addresses to be checked:
01000H , 01001H , 01002H , 01004H , 01008H
01010H , 01020H , 01040H , 01080H ,
01100H , 01200H , 01400H , 01800H ,
02000H , 04000H 
3
Check:
The completion print.
4
End of testing.
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
If 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.(pending)
3
Check:
The completion print.
4
End of testing
The test will automatically be terminated and the printer prints as fol-
lows:
When the test ends normally.
140
ROM
******** (CPU CODE)
******** (Version)
When the test ends abnormally. E- ~ -
140
ROM
******** (CPU CODE)
******** (Version)
12) AD conversion port
1
Key operation
2
Test procedure
The test program displays the voltage of each AD port.
3
End of testing
You can exit the test mode by pressing any key.
The printer prints the follwing.
1 6 0
13) RS232C test
Install the RS232C loopback connector. (UKOG-6705RCZZ)
1
Key operation
2
Test procedure
Control signal check
Data communication check
A loopback test of 256-byte data between SD-RD is performed.
DATA: $00 - $FF   BAUD RATE: 9600 BPS
3
Check: 
The completion print.
4
End of testing
Completion print 
RS TEST
OK
Error print 
RS TEST
**NG**ERxx
xx
Contents of the error
01 
ER DR error
02 
ER CI error
03
RS CD error
04
RS CS error
05
SD RD error  
DATA data
06
SD RD error 
DATA error/framing error
14) Sleep mode test
1
Key operation
2
Test procedure 
The test program checks the system in SLEEP MODE (The display
goes off and the Decimal point comes on) and then waits for any
status change (KEY input or RS PORT change).
3
Check that:
A) The display goes off (excluding Decimal point) 
B) The system turns active when any key is pressed.
4
End of testing
The test program will automatically be terminated and the printer
prints the following.
5 5 0
RCPT/PO
121
Display    
1 2 1
RCPT/PO
140
Display    
1 4 0
OUT PUT
IN PUT
/ER
/RS
/DR
/CI
/CD
/CS
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
RCPT/PO
160
1 6 0 1
1 6 0 2
1 6 0 3
X X X
X X X
X X X X
1. Head temperature
2. Head voltage
3. Battery voltage
RCPT/PO
500
7-segment display:    
5 0 0
RCPT/PO
550
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