A SERVICE OF

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Don’t forget to reset the Interrupt Flip Flops after an IRQ has occurred on
a particular Opto-isolator. A Reset should be done by writing a 0 and then
a 1 to the ISETX Register (Offset 18) to the appropriate Opto-Isolators
Interrupt Enable flip-flop.
IIWarning
Any parts replaced on the PC 62C must be done by a qualified or trained
technician. If you (the user) is not a trained technician then rather return the
board to your distributor for repairs explaining in detail what the problem is.
If you cannot solve the problem then simply call your distributor for immediate help.