yamaha spx90ii question

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zoinks77

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Hi,

I'm planning on selling my circa 1990's home studio and was testing everything and there's a problem with my SPX90ii. WHen you turn it on, the leds on the buttons and the number 88 on the display just continually blink. I suspect this is a memory problem. In fact, I've posted to a few other recording boards and a few people have written back saying it probably means just replacing the memory.

My question: if it is, is it necessary to solder the new memory battery into the board? Also, if I replace the old battery does anyone have a link where I can download the internal presets?

I'm starting to suspect I might be better off just selling as is to a store or person who's willing to put in the time to do this. If you're interested, let me know.

Thanks
 
My understanding is that all you need to do is replace the battery. The internal sounds are stored as ROM, and the battery only saves the user sounds.

I would get a battery and solder it in and see if that works. I haven't done that unit but have done a DX7S and a DMP11 which from my understanding use the same battery installed the same way.

The battery has leads attached to it so you need to get that version of the battery. It's not that big a deal.
 
it's been awhile since i been inside one but i think that's a coin type battery... just slide it in and do a reset... you'll need to check the manual for that..
 
It's not a simple slide - in, it's a special version of a common battery that has "legs" soldered to it that you need to solder to the pc board.

There is no reset procedure in the manual.
 
Last edited:
dintymoore said:
My understanding is that all you need to do is replace the battery. The internal sounds are stored as ROM, and the battery only saves the user sounds.

I would get a battery and solder it in and see if that works. I haven't done that unit but have done a DX7S and a DMP11 which from my understanding use the same battery installed the same way.

The battery has leads attached to it so you need to get that version of the battery. It's not that big a deal.
Click to expand...

This is exactly what is wrong and the battery change will fix everything.
For what you'll get for this after you replace the battery you are better off selling as is and lrt them take care of it.
 
thanks everyone!

Question--I've opened the unit up--actually found a place online that sells the battery, as well as a seller on ebay. I've never soldered anything before. Exactly how to remove the battery that's soldered in and how to do I solder in the new one? Is it possible to place the new battery in without soldering it?

Thanks again.
 
zoinks77 said:
thanks everyone!

Question--I've opened the unit up--actually found a place online that sells the battery, as well as a seller on ebay. I've never soldered anything before. Exactly how to remove the battery that's soldered in and how to do I solder in the new one? Is it possible to place the new battery in without soldering it?

Thanks again.
Click to expand...

There's no way to do it right without soldering...

And the best way to remove the existing battery is to
  • clip the leads off of the existing battery (to be replaced)
  • heat leads in circuit board carefully with iron and remove (with tweezers or a tap on the table)
  • remove excess solder from the holes (with solder wick, or desolderer)
  • slide leads on new battery into circuit board holes
  • apply solder
  • snip off excess lead from back of PCB

I suggest clipping the leads on the old battery so it doesn't act like a heat sync and you then damage the PCB by overheating trying to remove the old leads
 
wow--thanks so much for such an in-depth reply! much appreciated.
 
zoinks77 said:
wow--thanks so much for such an in-depth reply! much appreciated.
Click to expand...
You should also note the polarity +/- of the old battery before you remove it if it's not indicated on the circuit board and install the new one with the same orientation.
 
Thanks again.

I'm actually beginning to think that I might be better off just selling this piece "as is"--I've never soldered anything before and if I sell it cheap, someone else who's very experienced doing this type of thing could buy the replacement battery for 10 bucks and resell it for quite a bit more (or keep it and use.)

But thanks all for your great tips--If I do sell "as is", I'll definitely include the notes.
 
Well where do you live and how much do you want for it?
 
This could be doable what do you think shipping to N.H. would be $7.00 ?
 
that's great. I have no idea what shipping to NH would cost but I'm willing to ship it at cost--meaning, I have to buy a box, bubble wrap and tape--and I could ship it however you'd like it. Why don't you email me at springcleaning235@gmail.com and we'll set it up, if you'd like.
 
b tw you want to solder the + side first... leaving the battery voltage to float then tack down the ground... i've never roached a battery myself but know those who have...
 
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