Casio QT-2000 Service Manual page 62

Connect a loop back connector on COM3 port and perform the loop back test.
Operation: [m][2][5][SUB TOTAL]
m = baud rate ; 0: 1200 bps, 1: 2400 bps, 2: 4800 bps, 4: 9600 bps, 5: 19200 bps, 6:38400 bps
To stop the test, press [ESC].
Display: <LCD>
R/J print:
ASYNC ONLINE
ESC
(19) Infrared
Prepare two units of QT-2000 and set both units on the diagnostic mode. Face both units so that they can commu-
nicate by the infrared ports.
Prepare 2 machine and touch each IR I/F.
ASYNC ONLINE 25
OK: XX NG: XX count up
ESC 21
25
25
IR I/F
Reciever
Command code: 31
<Dot/7-segment>
0
Dot/7-segment display indicates 0 only when
the test is continued from the "Dot/7-segment
display test." When the test is performed
indipendently, the dot/7-segment display indi-
cates nothing.
Sender
Command code: 30
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0