B&B Electronics Parallel Printer Card PIOC Manuel d'utilisateur télécharger pdf (Page 58)

Some supplies have a feature called foldback current limiting. This form of current

limiting reduces the voltage output current of the supply drastically when overloaded, but

then locks the voltage at some low level until the load is removed. This is generally

undesirable, but you can use foldback limited power supplies as long as you are aware of

the issue and don’t exceed the power supply’s foldback current limit rating.

When it Doesn’t Work

In spite of our best efforts, sometimes a T35-GFX malfunctions in the field. If this

happens to you, we’ll do our best to get you up and running again as quickly and

conveniently as possible. Check the following sections for help solving your T35-GFX

problem.

Common Problems and Questions

Nonvolatile memory corruption

This is uncommon, but possible. If you notice that the stored parameters have funny or

nonsensical values, or if your T35-GFX acts strangely in any way, it won’t hurt to try

restoring the nonvolatile memory to factory defaults. See “Reinitializing non-volatile

memory”, earlier in the manual, for details on how to do this.

Failure to power up correctly; garbled display

Due to the fact that power is connected to the T35-GFX through alligator clips or

connectors, sometimes the T35-GFX will fail to power up correctly and the display will

be garbled and the T35-GFX will not function correctly. Disconnecting and then

carefully reconnecting the clips with a deliberate, non-jerky motion will result in a

normal power up sequence and normal operation.

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B&B Electronics Parallel Printer Card PIOC Manuel d'utilisateur Page 58