MV1FS coin cell battery help

[egg_sanwich]

Hey all,

I picked up this one slot board a while back with the battery already removed. I put a coin cell holder and battery in today to restore the functionality, but it’s still not working properly. The settings do not save and the internal clock runs endlessly fast, just like if no battery is present.

Whoever removed the battery removed the resistor for the charging circuit, but also the diode above it.


My question; would the missing diode affect the battery functionality? If so, what value diode do I need to replace it with?

If not, what next? I had repaired some previous trace damage from the leaky battery, I may have to look for more.
I’ve attached an image of mine plus an image from jnx (ignore the highlighted resistor, I’m talking about the diode above it) for reference.
Thanks
-egg

 

[BIG BEAR]

That diode definitely needs to be there. I've had acid from batteries on 2 slots get ahold of them before where they needed to be replaced.
BB

 

[egg_sanwich]

Thanks BB, that's great to know.

Any idea on what value diode goes there?

 

[BIG BEAR]

It's marked on the board, just google 1S1588 DIODE
I just grab one from a parts board but they're really cheap.
BB

 

[egg_sanwich]

Thanks BB!