Sunday, August 11, 2013

Grandpa Al’s Panasonic JE-1603U Calculator

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My in-laws brought us some items that belonged to Felice’s Grandpa Al. He was a great guy. This lovely calculator was probably used for all of his book keeping and such. Unfortunately it didn’t turn on anymore and the battery compartment had crusty deposits.

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Removing 4 screws.

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Pretty self-explanatory.

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That’s a vacuum fluorescent display.

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Crusty power jack.

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I don’t know what the wet/varnish looking deposits on the PC board are.

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Close-up of the display.

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More crust on the battery terminals. Vinegar cleaned it up.

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So many screws holding the keypad PCB on.

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The main IC, interestingly enough it’s a TI chip.

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The board was held on with two rubber mounts.

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PCB layout was such an artform back then.

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Almost done with those screws.

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Slider switches and rubber dome switches with carbon contacts.

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That’s a thing of beauty.

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Those damn contacts kept jumping off. I lost one and glued the other to the slider.

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Keys. I’m really glad I took pictures of the thing before I inadvertently dumped all of the keys out of the housing.

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A quick contact clean and de-crustifying and it works.


The refresh of the VFD is captured by the camera at different distances oddly.

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