MP-1- err 1 on startup

[tabascojunkie]

My MP-1 started losing memory a while back. On startup it runs through diagnostic and shows err 1, then goes to preset 1 with all settings at 0. It goes through this every time it powers up.

What does this sound like, bad battery?

[MarshallJMP]

Does it only show err1 or also err2 and err3?

Now this sounds like a bad battery anyway so best to replace it.You could tru to measure the voltage,should be at least 2.6V,but if that that low replace it anyway.

[tabascojunkie]

Yeah just err 1. I'll check voltage.

Here's a guestion, has anyone ever had luck just desoldering the battery instead of replacing the clip and everything?

[tabascojunkie]

So I fired it back up and it is err 1 2 & 3. Battery is dead so I found the parts at Mouser and got them ordered.

The mouser part number is 534-104 for the battery clip. Yall might want to pin that number somewhere,  I had to go through a few sites to find it.

Anyway,  hopefully in a few days the MP-1 will be singing again.

[tabascojunkie]

I replaced the battery with the the battery clip and she's back to life and holding presets. Yay.

[rnolan]

Good news  :thumb-up: Thanks for the tip on the part number BTW, we'll have to remember it's in this topic

[Syntho]

I changed the EPROM and installed a battery mod. Upon the first powerup after that, it read "C xxx" with xxx being the program numbers. It cycled all the way through 128, then read Err 1 and Err 2 (maybe Err 3 but can't remember). I restored the factory presets and now it seems to be working fine. I guess it's normal for it to do that right after taking the battery out and replacing it?

[rnolan]

I suspect it runs through a complete check, the same happens when you replace the CPU (which I did in one of my MB-1s).

[MarshallJMP]

I changed the EPROM and installed a battery mod. Upon the first powerup after that, it read "C xxx" with xxx being the program numbers. It cycled all the way through 128, then read Err 1 and Err 2 (maybe Err 3 but can't remember). I restored the factory presets and now it seems to be working fine. I guess it's normal for it to do that right after taking the battery out and replacing it?

Totally normal, nothing to worry about.