Casio TE-2000 Service Manual page 28

RS232C Port Test .................................. L oop back test for RS232C
Operation : 2 0 7
The roop back test for RS232C port is performed by the connection shown below.
2 Pin TxD
3 Pin RxD
6 Pin DSR
Test contents
(1) HI/LOW level reception check of DSR line
(2) Sending data (OA5h) to Tx D line, receiving the same data from Rx D line
The above (1) is checked once when the test starts.
The above (2) is checked repeatedly until power failure, mode OFF, or an error occurs.
"–" blinks on the most significant digit which is displayed during the test.
When the test normally ends, the following is printed and the receipt is issued.
232C OK
When the test does not end normally, the following is printed and the receipt is issued
232C OK
0 : Time over 1 : Overrun
2 : Flaming error 3 : RxD line data error
4 : DSR line reception error
Printing all characters
Operation : X 8 #–2 SUBTOTAL
X : 0 (or abbreviated) ... All characters are printed.
[Print image] partly differs from the actual printing
#
00
10
! ~ #$%&'()*+,-./
20
#–2 SUBTOTAL
Issuing receipt
X: Error code
X
Issuing receipt
8
← Printed according to the character code list
Issuing receipt
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