Technical data

Testing 5

1.2 Running a Self-Test

Self-test allows you to test every device again after power-up tests are

complete. Devices can be tested individually (except for drives), a few at a

time, or all of them sequentially just like power-up tests.

To individually test a device (drives are tested all together on their

particular bus), enter the word (TEST) or just the letter (T), followed by

a space and the test number of the device you want tested. Table 1–1

lists the devices and the test numbers that test the devices. Example 1–4

shows an example of running a self-test on an SCSI bus. All devices

connected to the SCSI bus are tested and the results are listed in the

conﬁguration table (TEST 50).

>>> TEST 6

6...

>>>

NOTE: Enter TEST 50 to see the results

Example 1–4 Running a Self-Test on an SCSI Bus

1.2.1 Self-Test with Loopback Connectors

A customer mode self-test (that is, without any serial line loopbacks) does

not test the drivers on the serial lines (DZ). To test the DZ drivers, run a

self-test on the serial lines in ﬁeld service mode by installing loopbacks

on the two MMJ connectors, then run TEST C. Display the conﬁguration

table to see the results.

If only one MMJ loopback is available, install it in the communications

port and run the tests. An error code of 0000.0200 for the DZ indicates

that the printer port does not have the loopback installed but the

communications port tested successfully.

NOTE

The ThinWire Ethernet port or the standard Ethernet port

(depending on which port the customer is using) on the back

of the system box must be terminated properly when running

diagnostics on the Ethernet circuits (TEST 1). Otherwise an error

code of 0000.7001 or greater is listed in the conﬁguration table.