steve_rb
Full Member level 3
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I am using an Instrument which is controlled by the attached circuit. It recievs commands from PC and sends singlas to preferal devices for cotrol purpose. It turns on RF generator for example. My problem is it sends commands to Zilog Z80180 processor for RF generator to be turned on but no signal coming out of zilog to the RF generator as I can monitor signals going to RF. Rf responds OK to commands from PC but does not recive any command from Zilog Z80180 processor. I have replaced Zilog processor and checked all PCB and found nothing is wrong. I relised there is a RESET signal connected to pin 7 of Z80180 and pin 11 of CE16v8h-25 gal chip. I think may be program inside CE16v8h has got stucked or some commnads inside zilog are stucked. Would reseting these two IC could help? Is there any risk of damaging PCB by connecting reset to ground using a 1K resistor as indicated in the attached file by a black filled resistor?
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