Service manual

XE-A201US
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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
follows:
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.
160
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 CD error
05 SD RD error DATA data
06 SD RD error DATA error/framing error
RCPT/PO121
Display 121
RCPT/PO140
Display 140
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/PO160
1601
1602
1603
XXX
XXX
XXXX
1. Head temperature
2. Head voltage
3. Battery voltage
RCPT/PO500
7-segment display: 500