3. Tests and Diagnostics

3.5 PIO Loopback Test

3.5PIO Loopback Test

The PIO loopback test will check below items through PIO loopback connector.

External Interrupt

External Loopback

-including Pattern test, Data Pin test, Control register test & Control pin/ Status pin test.

NOTE: Remember to connect a PIO loopback connector to the computer's printer port before test begins.

The screen should display as below, indicating whether the test is passed or failed when finished.

3-8

Satellite P20-25 Series Maintenance Manual

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Toshiba P25 manual Tests and Diagnostics PIO Loopback Test