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#17698 - 02/01/01 09:32 AM Poly 800-II memory problem
Alectroboy Offline
Member

Registered: 10/26/00
Posts: 67
Loc: Virginia, USA
I love my little Poly, but she's developed a memory problem lately.

I keep checking the battery, and it's at 3.29 volts, which should be fine. Nonetheless, about once a month, the memory gets wiped.

Last time it happened, I played the factory tape back into it (lost a couple of my own presets). Then I reconstructed my presets, and made a SysEx dump.

Now, when I try to play the SysEx dump back in, the display flickers for an instant, but the memory isn't restored. I'd prefer to avoid the tape, because it's so damn finicky. Anybody got a tip on restoring settings with SysEx?

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Curiously Refreshing music: http://mp3.com/alectroboy
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#17699 - 02/01/01 04:42 PM Re: Poly 800-II memory problem
Mike Nelson Offline
Member

Registered: 01/09/99
Posts: 141
Loc: Cottage Grove,MN,USA
Unless the battery is supposed to be more than 3 volts! Do you know the type, cause mine is just plain dead, no display, and I hate to think it would be anything more than the battery.Hadn't been that long since I played on it.mn

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#17700 - 02/05/01 10:58 AM Re: Poly 800-II memory problem
Alectroboy Offline
Member

Registered: 10/26/00
Posts: 67
Loc: Virginia, USA
Jeez, that doesn't sound too good. Mine still lights up after a memory loss. I was able to restore factory presets from cassette, but it still won't respond to SysEx, and it seems it also won't respond to Patch Change any more either. Aargh.

I hooked up the tape port to my sound card, and was able to make a very high quality "tape dump", which loads in more reliably than actual tape.

I got the number of a place which sells the service manual for $30. "Parts Is Parts": 800-590-0014.

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Curiously Refreshing music: http://mp3.com/alectroboy
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Curiously Refreshing music: http://mp3.com/alectroboy

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#17701 - 02/08/01 07:51 PM Re: Poly 800-II memory problem
Mike Nelson Offline
Member

Registered: 01/09/99
Posts: 141
Loc: Cottage Grove,MN,USA
I checked the battery voltage, and yeah, it was 3.2...but then I checked the current...it dropped from 80mA to 15mA over the course of a few seconds. So maybe voltage is not the whole story when checking a battery. Stay tuned and thanks for the manual tip.mn

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#17702 - 02/09/01 08:40 AM Re: Poly 800-II memory problem
Alectroboy Offline
Member

Registered: 10/26/00
Posts: 67
Loc: Virginia, USA
When you say you checked the current, I hope you don't mean you put the meter across the battery terminals and set it to read current? If that's what you did, you just killed a perfectly good battery, and probably the memory contents with it. When a meter is in current reading mode, it acts as close to a short circuit as its designer can manage. It is meant to go IN SERIES in a circuit, not in parallel. Based on the extremely high current reading you reported, it sounds as if you shorted it. These little batteries are intended to put out a microamp or so for long periods, not 80,000 microamps (80 mA). Sorry.

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Curiously Refreshing music: http://mp3.com/alectroboy
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Curiously Refreshing music: http://mp3.com/alectroboy

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