B&B Electronics Parallel Printer Card PIOC Manual do Utilizador descarregar pdf (Página 59)

Fuses

Figure 23. 20 amp fuses.

Sooner or later, you’ll blow one or more fuses on your T35-GFX, so go to the local auto

parts store and buy some extras now.

The two forward located fuses protect the charge and discharge power circuitry. The

rearmost fuse protects the power supply input circuit. All are rated at 20 A.

If you blow one of the forward fuses, change both, because they are connected in parallel

and it is most likely that if one blows, the other has been stressed and will blow shortly.

The fuses share current and so they both have to be in good shape in order to achieve the

full 40 A rating without blowing.

Normally, if you hook up the power leads backwards, the rearward fuse will blow

immediately, UNLESS your power supply goes into current limiting, or cannot deliver

enough current to blow the fuses. If this is the case, you will almost certainly see smoke

coming from your T35-GFX! Although this means a repair, it does not usually cause

extensive damage.

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B&B Electronics Parallel Printer Card PIOC Manual do Utilizador Página 59