HP 32SII success and woes
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02-11-2015, 11:42 PM
Post: #17
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RE: HP 32SII success and woes
(02-11-2015 03:55 PM)Bruce Larrabee Wrote: The metal plate is grounded but only really matters if the unit has a buzzer and only when the buzzer has only one spring contact. Hmmmmm - so I connected the central top Twisty clip holding the PCB in place to the negative battery terminal (assuming this is equivalent to ground - I am not an EE). Voila, the unit operates normally, but shows the low battery indicator. This leads me to speculate that there is a grounding issue on the PCB. That metal plate also serves to protect eyes/objects from touching the PCB and the integrated circuit. It is possible the previous owner was not careful in this regard. So, it looks like I am opening it up. I may try my hand opening a 10B first (no offense to anyone here), before working on this unit. Any thoughts on the grounding issue are welcome. Thank you all for your input and time. -- Sanjeev Visvanatha |
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