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Author Topic: Disassembled Calcs  (Read 2399 times)

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Offline p4nix

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Disassembled Calcs
« on: August 02, 2015, 04:13:18 pm »
Hello!

This is meant to be a thread including all calculators which were ever disassembled (on codewalr.us). So if you enjoy opening hardware, please feel free to contribute with pictures, tear down-instructions, strange things inside your calc, hardware-hacks-ideas and more.
I'll try to make a list of all disassembled calcs so nobody has to tear-down twice ;)

List
(click to show/hide)




fx-9860GII USB Power Graphic 2
(click to show/hide)


TI-81/TI-82/TI-85 by CVSoft
(click to show/hide)


Casio PRIZM by gbl08ma
(click to show/hide)
« Last Edit: August 18, 2015, 01:14:30 pm by p4nix »


  • Calculators owned: fx9860GII (SH4)

Offline Unicorn

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Re: Disassembled Calcs
« Reply #1 on: August 10, 2015, 05:48:58 pm »
As I said before, I have a Casio 9750g Plus, I believe, and I think I've already lost all the keys to it when I took it apart. So, it is no longer a calculator, I want want to do something with the screen now. I wonder if the screen resolution of an 83+ could be changed?
  • Calculators owned: I own all of them: PICKACHUP TI 84+ CSE TI 83+ SE TI something something ??? ??? ??? ??? ???
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Offline CVSoft

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Re: Disassembled Calcs
« Reply #2 on: August 10, 2015, 05:57:22 pm »
As I said before, I have a Casio 9750g Plus, I believe, and I think I've already lost all the keys to it when I took it apart. So, it is no longer a calculator, I want want to do something with the screen now. I wonder if the screen resolution of an 83+ could be changed?
It's not compatible. The TI-83 Plus expects a Toshiba T6A04 (or other display driver if the 83+ is newer), which is glued to the LCD via a ribbon cable. The maximum resolution for that display driver is 64x120 but the calculator OS isn't built for that.
  • Calculators owned: TI-73, TI-81, TI-81, TI-81, TI-81, TI-81, TI-81, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-83, TI-83, TI-83 Plus, TI-84 Plus, TI-85, TI-86, TI-89 Titanium

Offline Unicorn

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Re: Disassembled Calcs
« Reply #3 on: August 10, 2015, 05:58:59 pm »
As I said before, I have a Casio 9750g Plus, I believe, and I think I've already lost all the keys to it when I took it apart. So, it is no longer a calculator, I want want to do something with the screen now. I wonder if the screen resolution of an 83+ could be changed?
It's not compatible. The TI-83 Plus expects a Toshiba T6A04 (or other display driver if the 83+ is newer), which is glued to the LCD via a ribbon cable. The maximum resolution for that display driver is 64x120 but the calculator OS isn't built for that.
Ah, ok, thanks for the clarification. I guess I need something else to do with it. ;)
  • Calculators owned: I own all of them: PICKACHUP TI 84+ CSE TI 83+ SE TI something something ??? ??? ??? ??? ???
  • Consoles, mobile devices and vintage computers owned: PICKACHUP ??? ??? ??? ??? ???



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Offline CKH4

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Re: Disassembled Calcs
« Reply #4 on: August 10, 2015, 09:43:11 pm »
As I said before, I have a Casio 9750g Plus, I believe, and I think I've already lost all the keys to it when I took it apart. So, it is no longer a calculator, I want want to do something with the screen now. I wonder if the screen resolution of an 83+ could be changed?
It's not compatible. The TI-83 Plus expects a Toshiba T6A04 (or other display driver if the 83+ is newer), which is glued to the LCD via a ribbon cable. The maximum resolution for that display driver is 64x120 but the calculator OS isn't built for that.
What would happen if a screen of that size with those drivers were attached?

Also I've taken apart my 83+. It's pretty easy but it seems durable. I accidentally dropped the screen which hit the side of the calc. It was so scary but it worked fine after.
« Last Edit: August 10, 2015, 09:47:49 pm by CKH4 »
  • Calculators owned: TI-83+, TI-84+


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Re: Disassembled Calcs
« Reply #5 on: August 14, 2015, 11:40:23 am »
THe question is... how did Unicorn lose all his calculator keys at once? I could understand losing 1-3 keys somewhere during disassembling, but unless parents just saw the bag of key and threw it away in the trash or that Unicorn accidentally dropped the bag off a bridge, then I can't see how that's possible. O.O

As I said before, I have a Casio 9750g Plus, I believe, and I think I've already lost all the keys to it when I took it apart. So, it is no longer a calculator, I want want to do something with the screen now. I wonder if the screen resolution of an 83+ could be changed?
It's not compatible. The TI-83 Plus expects a Toshiba T6A04 (or other display driver if the 83+ is newer), which is glued to the LCD via a ribbon cable. The maximum resolution for that display driver is 64x120 but the calculator OS isn't built for that.
What would happen if a screen of that size with those drivers were attached?

Also I've taken apart my 83+. It's pretty easy but it seems durable. I accidentally dropped the screen which hit the side of the calc. It was so scary but it worked fine after.
Yeah I dropped my 83+ a few times before. A TI-80 would never survive any drop, unlike the other models.
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

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Offline princetonlion.tibd

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Re: Disassembled Calcs
« Reply #6 on: August 14, 2015, 12:53:28 pm »
My friends 2 years ago gave me their broken 4-function calcs so I could disassemble them :P
I somehow fixed one by stomping on it too O.O

If I remember to keep some of the broken 4-function calculators that I can get from my science teacher (and not use a hammer to disassemble it) I could put a few pictures.
  • Calculators owned: TI-83+, TI-84 + CSE, Voyager 200, TI-Nspire
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Offline CVSoft

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Re: Disassembled Calcs :: TI-81, TI-82, TI-85
« Reply #7 on: August 14, 2015, 08:12:08 pm »
Since we seem to be drifting away from the topic, TI-81/TI-82/TI-85 disassembly instructions!
(click to show/hide)
  • Calculators owned: TI-73, TI-81, TI-81, TI-81, TI-81, TI-81, TI-81, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-82, TI-83, TI-83, TI-83 Plus, TI-84 Plus, TI-85, TI-86, TI-89 Titanium

Offline gbl08ma

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Re: Disassembled Calcs
« Reply #8 on: August 14, 2015, 10:00:12 pm »
I would post pictures of the inside of my Casio Prizm, but since it has a special condition ("a poor repair job from Casio's service center in a south European country"), I believe it's best if I don't do it, to avoid confusion. They, along with pictures of "normal" Prizms, are widely available on other websites, including a nice curated list of links on the Prizm Wiki, so I guess not much is lost.

As for the tear down, it's really simple:
1. Remove the battery cover;
2. Remove the batteries*;
3. Unscrew all the screws on the back, including those on the battery compartment. The screws are all the same;
4. Profit!! Be careful not to lose the reset button. For even more profit,
5. Unscrew the two screws holding the circuit boards in place;
6. Gently lift them (be careful not to break any connections);
7. Extra profit!!

When putting everything back together, take care to make sure the battery springs go into their correct positions in the case. You really don't want to break them, if you do, you better have soldering skills :)

Also, in case more people have the screens of their Prizms lightly scratched: it's an unfortunate property of the plastic they used. I'm yet to see a screen protector for the Prizm that doesn't look ugly.

* People for the Ethical Treatment of Prizms recommends that the calculator be properly turned off before removing the batteries, to avoid damage to the highly vulnerable flash memory component (and to save me from hearing more stories about dead Prizms).
  • Calculators owned: Prizm CG-20

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Re: Disassembled Calcs
« Reply #9 on: August 14, 2015, 11:21:02 pm »
Weren't you one of the person that sent your fx-cg20 calc to get it repaired by Casio, only to get it back as an fx-cg10?

And yeah I noticed that unlike my TI-84+CSE, 84+CE, Nspire CX, ClassPad II and HP Prime, my PRIZM screen is quite scratched. It's almost like if dust alone did it.
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

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Offline gbl08ma

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Re: Disassembled Calcs
« Reply #10 on: August 14, 2015, 11:28:09 pm »
Weren't you one of the person that sent your fx-cg20 calc to get it repaired by Casio, only to get it back as an fx-cg10?

Yes :) And the big capacitors went missing, too. Well, at least we now know the calc can work fine without them, even though probably the components are less well protected/working under more stress. Something People for the Ethical Treatment of Prizms certainly does not approve :)

It's almost like if dust alone did it.

Indeed, and it appears that the metallic gray ink on the border also wears out as our fingers rub on it (on mine, the border near the EXE key is black instead of gray because the ink disappeared).
  • Calculators owned: Prizm CG-20

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Re: Disassembled Calcs
« Reply #11 on: August 15, 2015, 02:34:52 am »
Well, at least they didn't replace the calculator fonts with Comic Sans. It would be even worse than stripping the calc from its big capacitors. :P

And wow it sucks about the gray ink. I didn't notice myself, since I use the calculator less frequently than the color TI and HP models. One thing I noticed, though, is that my PRIZM smells very bad, like how most brand new electronic devices smell like, but ten times worse and the smell lingers on your fingers after using the calc. That alone might be one reason to not disassemble my PRIZM. <_<
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

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Offline Unicorn

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Re: Disassembled Calcs
« Reply #12 on: August 15, 2015, 07:09:33 am »
A bit back, but my deskt is a mess,and we just rearanged myroom, soI'm not sure where they went :P
  • Calculators owned: I own all of them: PICKACHUP TI 84+ CSE TI 83+ SE TI something something ??? ??? ??? ??? ???
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Offline gbl08ma

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Re: Disassembled Calcs
« Reply #13 on: August 15, 2015, 05:51:33 pm »
Well, at least they didn't replace the calculator fonts with Comic Sans. It would be even worse than stripping the calc from its big capacitors. :P

Actually I would consider that an improvement, since for everything other than numbers and math symbols, the normal size font is quite ugly and doesn't help with fast reading. At least Comic Sans is sans-serif and variable-width ;)
  • Calculators owned: Prizm CG-20

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Re: Disassembled Calcs
« Reply #14 on: August 15, 2015, 06:11:39 pm »
Yeah but the calc would most likely receive massive hate from the entire internet since Comic Sans is the most hated font because of the Geocities era. At least it should have been Arial or something like that. :P
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

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