Finally the rare (unobtainable) manual for Sharp EL-506P

[Mjim]

(08-20-2021 01:28 AM)giubin Wrote:  Yes, unfortunately the EL-506A don't have constants, but you know, i like the charme of this calculators.

The built-in constants is a bit of a gimmick though it can help with calculation speed, but I would be just as happy if they printed the constants on the wallet instead of the constant key reference.

(08-20-2021 01:28 AM)giubin Wrote:  So you got error trying to solve 2-variable linear equations? I don't know, without manual (can't find online this neither), I can't figure it. You have some explanation? It simply can't?

The manual doesn't say it can or can't from what I can see, but the EL-506A couldn't solve the following while the EL-546 can:

3x + y = 15
x + 2y = 10

EL-506A: Error
EL-546: x=4, y=3 Det=5

The way the 3-VLE mode works is you enter the coefficients in sequence:
A1 -> B1 -> C1 -> D1
A2 -> B2 -> C2 -> D2
A3 -> B3 -> C3 -> D3
x -> y -> z -> Determinant

For the 2-variable linear equation I left C1, C2, A3, B3, C3, D3 all set to zero:
3 -> 1 -> 0 -> 15
1 -> 2 -> 0 -> 10
0 -> 0 -> 0 -> 0
4 -> 3 -> S -> 5 (S = Skipped, the EL-546 skips this since it's a 2 Variable equation)

In addition according to the manual for the EL-506A it shouldn't work for equations where D1, D2, and D3 are equal to zero:

x - 2y - 3z = 0
3x + 2y - z = 0
3y + z = 0

EL-506A: x=0, y=0, z=0, Det=-16
EL-546: x=0, y=0, z=-0.5, Det=-16 (WRONG)

But the EL-506A gives the correct answer anyway, though the EL-546 give a wrong answer back.

(08-20-2021 01:28 AM)giubin Wrote:  You are so kind for the manual, btw the EL-506A that i bought, is in box with manuals

I'll scan for you too and share with you all

Many thanks.

That is very kind of you to do so; does the EL-506A come with the Sharp "Conquering the Sciences" mini-textbook? That one looks to be a real pain to scan (132 pages with text printed close to the middle).

(08-20-2021 01:28 AM)giubin Wrote:  EDIT: Your Sharp EL-546 is so fascinating too. I like it.

Yeah I'm fond of it too , hopefully you will come across a good deal on it online (they seem to sell for cheaper than the EL-506SLR from what I've seen).

In saying that the EL-506A is noticeably faster than the EL-546 and a little bit faster than the EL-506P (maybe they clocked the chip down on the EL-546 so that it could work better off the solar cell?)