Oki 182 Handbook page 144

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2. Be sure to have paper and ribbon inserted, then turn the printer
off.
3. Remove the printer cabinet:
a. Remove the platen knob.
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b. Remove the access cover, roll paper stand, and tractor feed
unit if installed.
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c.
Loosen the two recessed mounting screws on both sides of
the top front on the printer.
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d. Lift off the cabinet.
Performing the Circuit Test:
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A circuit test checks the serial interface to ensure that the proper
signals are being sent on the active lines. The test provides a printout
notice indicating whether the test was performed successfully. After
you remove the printer cabinet, proceed as follows:
1. Set switch
#
6 to OFF, selecting the circuit test.
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2. Disconnect your interface cable and connect the test cable.
3. Turn the printer on, leaving the cabinet off; the test should pro ­
duce the following results:
"LOOP TEST" is printed
"RAM 2K" is printed
The message buffer is checked. If memory is normal, "OK" is
printed. If memory is faulty, "BAD" is printed.
Signals DTR, RTS, and SSD are set to low (-). If CTS, DSR, or
CD is positive, "IF BAD" is printed.
4. If you received a "BAD" message, something is wrong with
your serial interface. If you are unable to diagnose the problem,
contact your OKI dealer for further assistance. If your dealer
cannot assist you, call our Customer Service Representatives at
OKIDATA GmbH.
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