HP Forum Archive 08

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HP31E, position of the ICīs?? Message #1 Posted by Gunther on 31 May 2002, 3:11 p.m. Hello, who can me help, fit my HP31E? I have open the calculator for cleaning and now i dontīt know what is the right position of the three Icīs on the base? Many thanks for help... Gunther

Re: HP31E, position of the ICīs?? Message #2 Posted by Tony Duell (UK) on 31 May 2002, 5:43 p.m., in response to message #1 by Gunther Firstly, all the ICs fit with pin 1 (notched end) towards the display. And it's obvious where the 40 pin chip (processor, etc) goes. I _think_ that for a -E machine it doesn't matter which of the 8 pin ICs goes where. In a -C machine, the top position, closest to the display, receives the backup supply, so must be used for the RAM, but in a -E, all the locations are wired the same. I am almost certain that you won't damage anything by trying it.

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