Author Topic: EEVblog #582 - HP41CV Teardown  (Read 5211 times)

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Offline rjk5378

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Re: EEVblog #582 - HP41CV Teardown
« Reply #60 on: February 25, 2014, 11:41:20 AM »

reminds me of the steven wright joke: ...


Another Steven Wright bit was something like: "I bought a new camera. It has lots of features. It's so advanced you don't even need it."
- Bob, KY3R

Offline SeanB

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Re: EEVblog #582 - HP41CV Teardown
« Reply #61 on: February 28, 2014, 05:51:33 AM »
Well, opened it up and took a few photos. Interesting in how they stacked the assorted chips to increase density.

Offline HP-ILnerd

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Re: EEVblog #582 - HP41CV Teardown
« Reply #62 on: February 28, 2014, 10:35:30 AM »
Linux-works:  Nice job fixing those, and spectacular photos!  Amazing how no one anywhere seemed to realized what would happen to the gummy wheels over time.  I have an HP-97 that works perfectly (cosmetically fine, too) but needs to have its gummy wheel replaced.  It's on the list of things to do when I finish up my new bench...

SeanB:  How much of that main board is factory?  Also, is that hot glue on the display?

Online Wytnucls

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Re: EEVblog #582 - HP41CV Teardown
« Reply #63 on: February 28, 2014, 11:09:59 AM »
My TI 58C is much different inside. It is original, apart from the battery contact springs, which corroded a long time ago.
The TI quality is very inferior to the HP workmanship.
No stacked chips in this one.
« Last Edit: February 28, 2014, 11:12:33 AM by Wytnucls »

Offline SeanB

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Re: EEVblog #582 - HP41CV Teardown
« Reply #64 on: February 28, 2014, 03:19:18 PM »
Only bodges are the epoxy on the cracked display on the front, and the zener diodes and capacitors replacing the battery clips which rotted away from the battery failing. The display has a cover to hide the crazing and scratches, must look to replace it or polish it, but it does not worry me. All the stacked chips and such are original, this is a very old unit, probably was made when I was still in school. It has a slightly bouncy keyboard, but still does all that it needs to.

Online Hydrawerk

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Re: EEVblog #582 - HP41CV Teardown
« Reply #65 on: March 31, 2014, 01:24:53 AM »
I have one, too. But I do not like RPN.
Amazing machines. http://www.youtube.com/user/denha (It is not me...)

Offline SeanB

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Re: EEVblog #582 - HP41CV Teardown
« Reply #66 on: March 31, 2014, 01:39:34 AM »
You need to dust it...... ;)



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