Rs232C Port Batch Test - Casio QT-6000 Service Manual

[ 17 ] RS232C PORT batch test

[Function]
This is the RS232C port batch test.
The loop back test for RS232C port is performed by making the connection shown in the figure.
The loop back test is performed from COM1 to COM 6 by the following setting by one time check.
When performing this test, fix loop back connectors to all COM ports.
[Operation]
Operation : 4
Baud rate: COM1: 115 kbps, COM 2 – 6 : 9600 bps
Check time: one time
[LCD]
COM BATCH 40
RTS1=1 CTS1=1 OK
DTR1=1 DSR1=1 OK
DTR1=1 CD1=1 OK
DTR1=1 CI1=1 OK
RTS1=0 CTS1=0 OK
DTR1=0 DSR1=0 OK
DTR1=0 CD1=0 OK
DTR1=0 CI1=0 OK
TxD RxD OK
RTS2=1 CTS2=1 OK
DTR2=1 DSR2=1 OK
DTR2=0 CD2=0 OK
DTR2=0 CI2=0 OK
TxD RxD OK
•
•
•
END 40
The same display for COM2 appears for COM3 to COM6.
Note that the actual display shows only a part of the results (not the whole as shown in the left).
COM1
T x D
R x D
C T S
R T S
D T R
DSR
C D
C I
0 ST
COM 1 test result
COM 2 test result
Figure : RS232C port connection
COM2 COM6
T x D
R x D
C T S
∗
R T S
D T R
DSR
∗
∗
: output "1" "0" from the output terminal and checks the input terminal.
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