Troubleshooting
First, make sure that all cables are securely attached and seated completely in their sockets.
Problem | Possible Cause | Action |
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Unit operates | Static electricity may | Disconnect the |
erratically | cause the unit to | appropriate USB cable |
| operate erratically. | from the US221A / |
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| US421A port, then |
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| reconnect it. |
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|
Printer does not | Printer was not | |
appear in | installed correctly. | configuration utility will |
configuration |
| now find the printer. |
utility. |
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Monitor program | The printer’s USB port | Disable the Auto Switch |
of a printer does | is configured for a PC; | function and operate the |
not respond / Print | the US221A / US421A | US221A / US421A |
error messages | is in Auto Switch | manually. |
are generated | mode. |
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The Lock / Unlock | The too rapid or | Disconnect all USB cables |
function does not | continuous | from the US221A / |
respond | connecting / | US421A, then reconnect |
| disconnecting of a | them. |
| USB connector from a |
|
| locked port can cause |
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| the status of the lock |
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| to be misread. |
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Auto Switch print | OS printer settings not | Reboot your PC to re- |
function does not | sent / not set correctly. | establish settings, or re- |
respond. |
| install the Configuration |
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| Utility. See Software |
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| |
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Auto Switch | OS failed to close the | Manual close the |
function for other | application. | application in your OS. |
devices does not |
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release control |
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after application |
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closes. |
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