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hp7400c scanner pinout

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by pswart

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I am using an hp7400c scanner.
I would like to scan an object, using the normal 'underglass' light source, AND switch the XPA adapter lightsource on at the same time.
Can anyone supply the pinouts for the XPA?
HP said they cannot/willnot supply the info.
Thanks

1 reply

by thechas

There are many reasons that you may not want to run both lamps at once.

Power supply may not have enough power to run both lamps.

Internal circuitry may not be heavy enough to run both lamps at once.

I would SERIOUSLY consider using an external light source rather than risking damage to the internal circuits of the scanner.

Chas

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