BAT indicator stuck on

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cdmackay
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BAT indicator stuck on

Post by cdmackay »

I posted the following in the main Beta thread, but didn't see any response.

I've pinged Michael via email, no reply as yet.

Anything I can do, please?

thanks…
cdmackay wrote:
Wed Jan 29, 2020 10:20 pm
cdmackay wrote:
Tue Jan 28, 2020 6:18 pm
Just got my Beta unit, wonderful, thanks very much.

The BAT indicator is on, I take it that means I need to change the battery? hmm.
Changed the battery, put in a fresh CR2032. BAT indicator still on. Tested old and new batteries on a tester: both show as full.

Does this indicate a hardware issue with mine (s/n 4), or is there something I need to reset?
Battery voltage (open circuit) is 3.2V.

At the SPI2 header, Vcc is consistently 3.2V, with calculator on or off, yet BAT indicator remains.

Pressing RESET button made no difference.

Software issue? Anyone else seeing this?
Cambridge, UK
41CL/DM41X 12/15C/16C DM15/16 17B/II/II+ 28S 42S/DM42 32SII 48GX 50g 35s WP34S PrimeG2 WP43S/pilot
Casio, Rockwell 18R
rprosperi
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Re: BAT indicator stuck on

Post by rprosperi »

It's worth the small effort to try a h/w reset via pin in the back, but I'd guess it won't change anything.

Also try cleaning the battery holder contact surfaces. Again, seems unlikely but worth a try.

Last thing would be to short the battery terminals and press/hold the power-button ON to try to fully drain the circuit. Then leave it off w/batteries out overnight.

If not, I'd say a definite h/w problem. If so, update this thread and then drop Michael another email.

Good Luck!
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
Ángel Martin
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Re: BAT indicator stuck on

Post by Ángel Martin »

Maybe also worthwhile try clearing the user flag 49 and see if BAT disappears...
Then switch the calculator OFF.ON again. Should add more details for diagnosing.
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ijabbott
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Re: BAT indicator stuck on

Post by ijabbott »

Also check the Vdd value on the DMCP Self Test Diagnostics page. I think it should be reasonably close to the battery potential in millivolts, except when powered by USB. In any case, it's more info for diagnosing the fault.
cdmackay
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Re: BAT indicator stuck on

Post by cdmackay »

thanks very much Bob, Ángel, Ian.

rprosperi wrote:
Sat Feb 01, 2020 2:24 am
It's worth the small effort to try a h/w reset via pin in the back, but I'd guess it won't change anything.
I'd already tried the reset button, no joy. I've removed the battery, held down the On button, and shorted the contacts, again no joy. Have done so again and will now leave overnight without battery.

Ángel Martin wrote:
Sat Feb 01, 2020 8:06 am
Maybe also worthwhile try clearing the user flag 49 and see if BAT disappears...
Then switch the calculator OFF.ON again. Should add more details for diagnosing.
I'll try that tomorrow. I thought flags > 30 were read-only system flags; is that different on the 41X?

ijabbott wrote:
Sat Feb 01, 2020 12:42 pm
Also check the Vdd value on the DMCP Self Test Diagnostics page. I think it should be reasonably close to the battery potential in millivolts, except when powered by USB. In any case, it's more info for diagnosing the fault.
I had noticed that Vdd was odd (1221) yesterday, so assumed it wasn't what I thought it was, and didn't report it, sorry.

Just re-checked: the battery voltage is down 0.1V, to under 3.1V (3.17V yesterday to 3.07V today) despite no use.

Vcc on SPI2 header reads the same as the battery.

Self-test screen shows: Vdd:1221,cal:1666 — those are the same values as yesterday, despite Vcc dropping over 0.1V

Vdd 1221 is interesting, if it's supposed to be 3V? It doesn't fluctuate at all, and is the same value as yesterday, which seems unlikely if it's indicating millivolts.


If others don't mind trying the self-test (BUT read on first), I'd be interested in their Vdd values.

NOTE: the diags self-test screen doesn't seem to have a way out of it, other than waiting for it to timeout (600s?), or pressing the Reset button, which will cause the emulator a Memory Lost, so don't do that if you have stuff to lose.

thanks!
Cambridge, UK
41CL/DM41X 12/15C/16C DM15/16 17B/II/II+ 28S 42S/DM42 32SII 48GX 50g 35s WP34S PrimeG2 WP43S/pilot
Casio, Rockwell 18R
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ijabbott
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Re: BAT indicator stuck on

Post by ijabbott »

cdmackay wrote:
Sat Feb 01, 2020 8:27 pm
ijabbott wrote:
Sat Feb 01, 2020 12:42 pm
Also check the Vdd value on the DMCP Self Test Diagnostics page. I think it should be reasonably close to the battery potential in millivolts, except when powered by USB. In any case, it's more info for diagnosing the fault.
I had noticed that Vdd was odd (1221) yesterday, so assumed it wasn't what I thought it was, and didn't report it, sorry.

Just re-checked: the battery voltage is down 0.1V, to under 3.1V (3.17V yesterday to 3.07V today) despite no use.

Vcc on SPI2 header reads the same as the battery.

Self-test screen shows: Vdd:1221,cal:1666 — those are the same values as yesterday, despite Vcc dropping over 0.1V

Vdd 1221 is interesting, if it's supposed to be 3V? It doesn't fluctuate at all, and is the same value as yesterday, which seems unlikely if it's indicating millivolts.


If others don't mind trying the self-test (BUT read on first), I'd be interested in their Vdd values.
On my DM42 currently, Vdd: 2953 (±3), Cal: 1663. The DM42 status line shows 2.92V, and an old analogue multimeter (I don't have a DMM handy) measuring the voltage between GND and VDD on the LPUART1 pads (next to the right hand PCB screw) reads just under 3V under load. So the Vdd status appears to be the measured millivolts, more or less.

Since I'm the one that suggested the link to millivolts to you, it would be useful to get readings from others for confirmation.

If your calculator thinks Vdd is only 1221, that would explain the BAT annunciator. The question is, why is it being misread?
cdmackay
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Re: BAT indicator stuck on

Post by cdmackay »

aha! thanks very much Ian…
ijabbott wrote:
Sat Feb 01, 2020 9:37 pm
On my DM42 currently, Vdd: 2953 (±3), Cal: 1663. The DM42 status line shows 2.92V, and an old analogue multimeter (I don't have a DMM handy) measuring the voltage between GND and VDD on the LPUART1 pads (next to the right hand PCB screw) reads just under 3V under load. So the Vdd status appears to be the measured millivolts, more or less.

Since I'm the one that suggested the link to millivolts to you, it would be useful to get readings from others for confirmation.

If your calculator thinks Vdd is only 1221, that would explain the BAT annunciator. The question is, why is it being misread?
I don't know how I missed that Vdd pad on the board, sorry.

Just checked, and both Vcc and Vdd read 3.098V on the board.

But self-test continues to show Vdd:1221


system flag 49 is set, as expected, and can't be cleared (NONEXISTENT).
Cambridge, UK
41CL/DM41X 12/15C/16C DM15/16 17B/II/II+ 28S 42S/DM42 32SII 48GX 50g 35s WP34S PrimeG2 WP43S/pilot
Casio, Rockwell 18R
pmmears
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Re: BAT indicator stuck on

Post by pmmears »

Unless I have misunderstood your post, which is always possible, you have the battery indicator on top right. If so that is always there and goes from full to empty (decreasing segments filled in as battery is used). This is same as DM42.
cdmackay
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Location: Cambridge, UK
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Re: BAT indicator stuck on

Post by cdmackay »

pmmears wrote:
Sat Feb 01, 2020 10:57 pm
Unless I have misunderstood your post, which is always possible, you have the battery indicator on top right. If so that is always there and goes from full to empty (decreasing segments filled in as battery is used). This is same as DM42.
Thanks; right! And mine seems to show a squashed battery, which is perhaps meant to be an amusing way of indicating empty?

20150103-14112681.bmp
20150103-14112681.bmp (12.31 KiB) Viewed 4587 times
The question I'm asking here is why it's showing empty, and I'm getting the BAT status indicator, when the battery is new, and reading > 3V at two test pads on the board itself?

Another interesting point: the BAT indicator remains on even when USB-powered.
Cambridge, UK
41CL/DM41X 12/15C/16C DM15/16 17B/II/II+ 28S 42S/DM42 32SII 48GX 50g 35s WP34S PrimeG2 WP43S/pilot
Casio, Rockwell 18R
rprosperi
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Re: BAT indicator stuck on

Post by rprosperi »

@cdmackay - You've certainly checked just about every possible cause and/or feasible symptom, and it appears there is indeed some kind of h/w issue with your BETA 41X. Congratulations, you're the first... :lol:

Please email Michael directly, summarize the issue and he will handle this. It's possible he has some other diagnostics to suggest, I'm not sure.

Thanks very much for your patience and thorough checking, it's truly appreciated. :D
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
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