Serial Port Loopback Test - NCR PC4i Service Manual

LEVEL 1 DIAGNOSTICS
Serial Port Loopbeck - Testa the aerial port aw;tch on the
11u1in
processor
board. Then, teat• tha port loopback. Raquirea a aerial port loopback wrap
plug for tho port.
Parallel Port Loopback - Taste the parallel port switch on the main processor
board. Than, taeta the port loopback. Raqui ra, para L la L port Loopback
for the part.
Generic Printer - Prints tha ASCII character aet on the parallel printer.
PC-Coapatlble Printer - Prlnto the ASCII character &at and PC-apeci fie
control codas on a PC-compatible printer
<F3> Return to previous •anu
Serial Port Loopback Test (Peripherals Menu Line 1)
When selection number "1" is chosen from the
peripherals menu, the Serial Port Loopback test is
performed. The name of the test is displayed while
the test is in progress.
This test requires the use of a serial port Test (
Adapter <refer to Chapter 1 "Tools") for the test.
For test run the Test Adapter (on screen displayed as
"wrap plug") has to be plugged into the appropriate
port.
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