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Groups > sci.electronics.components > #5965
| From | Look165 <look165@numericable.fr> |
|---|---|
| Newsgroups | sci.electronics.components |
| Subject | Re: Mysterious part in an old calculator |
| Date | 2016-04-17 19:47 +0200 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <nf0i77$1elq$1@gioia.aioe.org> (permalink) |
| References | <dnhnntFfidtU1@mid.individual.net> |
Seems to be a 4.7 Ohms resistor. Piotr Piatek a écrit : > Could someone identify the blue part (marked on the board SC81EIA4R7M), > please? > http://www.pisi.com.pl/piotr433/misc/bluething.jpg > > It's used in an old calculator Casio FX-602P, manufactured in year 1984. > The part is connected across the power supply pins of the static RAM > chip uPD444G. It could be a capacitor (but other capacitors on the board > look ordinary and are marked differently), or perhaps a varistor or a > Zener diode. > > Here's the FX-602P circuit diagram drawn by me: > http://www.pisi.com.pl/piotr433/fx602sch.pdf > and a photo of the whole board: > http://mycalcdb.free.fr/galerie/Casio/casio_FX-602P.4.jpg
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Mysterious part in an old calculator Piotr Piatek <piotr433@pisi.com.pl> - 2016-04-17 17:17 +0200
Re: Mysterious part in an old calculator Look165 <look165@numericable.fr> - 2016-04-17 19:47 +0200
Re: Mysterious part in an old calculator "Ian Field" <gangprobing.alien@ntlworld.com> - 2016-04-17 20:09 +0100
Re: Mysterious part in an old calculator Look165 <look165@numericable.fr> - 2016-04-18 08:49 +0200
Re: Mysterious part in an old calculator Piotr Piatek <piotr433@pisi.com.pl> - 2016-04-18 14:48 +0200
Re: Mysterious part in an old calculator legg <legg@nospam.magma.ca> - 2016-04-18 09:22 -0500
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