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restoration of vintage pocket LED watch

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Andrew Babanin

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restoration of vintage pocket LED watch

Post06 Aug 2021, 02:01

There are two old timepieces, I guess they were made in smallest quantities for presents. Here they are after my repair.

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The second watch had the sample of microchip assembly, besides I've got a draw of wire bonding, so I decided to make a few assemblies just in case.
I took ebauches of new assembles and chips. Big IC - chip and two ICs for 4 and 7 transistors, also micro resistor assembly. All parts are original, not used and produced approx at that time (+ - 2 years)

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The next step is to glue with epoxy components in the same order like in sample.

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So we can start wire bonding. I use aluminium wire and manual wire bonder.

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All ICs are bonded according to draw

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It's time to glue caps

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Cut our assembly out the frame

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Then soldering assembly to the board

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Here the sample of wire bonding the new old stock chip into one of the earliest soviet LED watch (proto B6-03). Old defected chip is removed and then new chip is glued in with epoxy

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Using ultrasonic wire bonder connecting our chip to the board

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The proof of the pudding is in the eating...
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Kasper

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Re: restoration of vintage pocket LED watch

Post07 Aug 2021, 11:22

impressive stuff :-D
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Adam

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Re: restoration of vintage pocket LED watch

Post12 Aug 2021, 16:31

Just outstanding Andrew. I am in awe. Thank you for sharing, made my day. Adam
http://www.digital-watch.com - online database of 2000+ watches, manuals and adverts from the 70s-90s
http://www.vintagelcd.com - Vintage Digital Watches for sale
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gjlelec

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Re: restoration of vintage pocket LED watch

Post15 Aug 2021, 10:57

Amazing work :eek:

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