A Casio Pokécom Compendium, fixing up a collection of Casio pocket computers
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- čas přidán 16. 07. 2024
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In this video we take a look at some Casio pocket computers in my collection that still needed some sort of TLC. The first order of business was to #GTDBO (Get The Darn Batteries Out), then we’ll concentrate on three different models which have three different issues. We’ll dissect an LCD, build a battery pack, and attempt a internal RAM upgrade. How did we make out? Join us and find out!
Timeline:
00:00 - Welcome
02:23 - PB-100, LCD dissection
12:23 - FX-820P, new battery pack install
30:59 - FX-840P, internal 32K RAM upgrade attempt
49:16 - Wrap up. Thanks!
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Links
FX-840P Info: kyoro205.g.dgdg.jp/cgi/calcdb....
FX-880P Teardown: neil.computer/notes/casio-fx-...
FX-880P 64K internal hack: manib.bplaced.net/blog/?page_...
FX-850P Service Manual: archive.org/details/casio-fx-...
RP-33 Redux: www.soigeneris.com/casio-rp-3...
Amazon Associated Links Tools:
Battery Spot Welder: amzn.to/3QMaG3T
Hotplate: amzn.to/3rxOtLU
Spudger set I use: amzn.to/3z19pM7
Heat mats: amzn.to/3boKDwl
Amazon Associated Links Chemicals:
CiaKot: amzn.to/3CvVKiY
Overcaot Pen: amzn.to/3s439Bt
Novus Plastic Polish: amzn.to/2VwtFaV
Electronics / PCB cleaner: amzn.to/3ORx62D
Citric Acid: amzn.to/3krkgdt
Amazon Associated Links Parts / Supplies:
Foam sheet, 1mm: amzn.to/37CfTtt
Uxcell shrink wrap: amzn.to/3boKJEd
NiMh tabbed Sun-C: amzn.to/3nHCbxL
NiMh tabbed AA: amzn.to/3OMjBkW
uxCell strain reliefs: amzn.to/3nJ5AaP
3M Double sided tape: amzn.to/3rYCxBX
Credits
Working of LCD GIF: www.circuitstoday.com/liquid-c...
Chiptune Thing No. 3 "Victory" by Steven O’Brien / stevenobrien
Creative Commons - Attribution 3.0 Unported- CC BY 3.0
creativecommons.org/licenses/b...
Music provided by Music for Creators • Chiptune Thing No .3 V... - Věda a technologie
oh thanks for sharing. I landed in this channel coz I got FX-840P in my online local shop for just 17 usd.
Pocket computer in 1980 too 1990 was Amazing with basic. (In french) , on en trouve encore quelques exemplaires dans les brocantes avec imprimante et documentation.
12:12 That would be interesting. Sure!
Hey Birt! Maybe you can add a very low power LED on either side of the PB100's display to make it a "side" lit display... with the white paper as a backing, it should reflect quite nicely.
The light needs to travel through both polarizers. For any sort of backlight the rear polarizer is a transreflective type that lets light through toward the outside.
Sorry, maybe I wasn't clear... I'm not suggesting a backlit display... but rather a side lit one... a la my old Casio watch. The side lit LED is just at the right side edge of the LCD. The LED isn't going through the LCD, but rather the light is travelling on top of it. It makes it more visible, but really doesn't help the contrast, whereas a backlit one would. Similar to the way a reading light doesn't enhance a books contrast, but allows it to be read.
Loving you stock of #CASIO - I hope soon also to be able to feature my PB-100 Perconal Computer
Dig it.
Very good! I have an FX-890P with LCD "burn". Any further comments you make on the replacement of the reflective polariser tape would be very helpful.
I just picked one up from Japan (it isn't here as of yet). Looks mint and has the 256K upgrade. :)
Where do you go for info and downloads for it? Thanks!
Nice to see your collection of Casio Pokémons! I would like to see the rear reflective/polarizer replacement attempt in a video as well. I have a bunch of the Casio Graphing Calculators (FX-7000G and FX-7800G) that have similar issues with the rear polarizer and some with the front polarizer as well that has oxidation (big black spot) or that have turned purple and are separating from the LCD itself and I have ordered some replacement polarizers/reflectors to see if I can repair them as well so I would certainly be interested in how you get along with your attempt. I also got some thin white backlight panels for a Nintendo Gameboy and I think I am going to try and backlight a few of these graphing calculators as well and see how that experiment goes.
On the FX-820P, those threaded brass inserts you mentioned are for the bottom cover screws for the bottom cover which apparently did not come with your FX-820P.
I still need to pick up a few of your 32K RP-33 Rampacks as well as some ALPS brass gears for the printers in some of my PB-700 / FA-10 / FA-11 units. I got a few sets of NOS pens from BEST Electronics that apparently ATARI uses the same ALPS mechanism in the Atari 1020 Color Plotter. Also the FA-10 / FA-11 printer expansion units have 5 C-Cell Ni-CD battery packs in them. #GTDBO!
Keep up the awesome work Birt! Looking forward to your next endeavors!
It makes sense that there should be a back on the FX-820P. I'll find a picture and see if I can replicate something similar. With a backlight you need a different type of rear polarizer, this may come built into the backlight panels you got. Check the orientation of the panel polarizer to make sure it is 90 degree to the font one.
DOOD!
I have somewhere in the neighborhood of 10-15 Sharp pocket computers, and aside from a couple of the early models that have known issues with the LCD, they all seem to just work. Do you find them to be more reliable than Casio machines?
Both Casio and Sharp both seem to fail in similar frequency. Different models of both brands have LCD problems. I've seen odd RAM/ROM failures on both brands too.
Hey Birt! How can I contact you about a potential pocket computer/accessories/printer paper donation to your channel?
Hi you can email me at birt_j at soigeneris dawt com
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