[sdiy] Roland Cr-78 troubleshoot/repair

[Simon Brouwer]

Hi, 

If you replace it with a NiMH battery, note that NiMH is more sensitive to
overcharging than NiCd (lazy battery effect). Where trickle charge for NiCd was
commonly set to 0.1C, for NiMH this is 0.05C. So it would be best to choose a
capacity of around double that of the original NiCd, if not modifying the
circuit to decrease trickle charge current.

Best regards
Simon

> Op 22 juni 2016 om 7:27 schreef J Brave <onephatcat at earthlink.net>:
> 
> 
> Hi, 
> 
> 1. I have a Roland CR-78 with original battery which has not yet leaked. I
> would like to replace it with a new NiCad rechargeable rather than attempt the
> job I see most have done disabling the charging circuit. Any reason not to do
> this? Any idea what exactly would be a good replacement rechargeable NiCad
> battery?
> 
> 2. When I attempt using various means to program custom rhythms, including a
> FutureRetro Swynx, instead of a single drumbeat I get a bunch of semi-random
> garbage rhythms with the selected instrument. Is this a typical sign of the
> dead battery or something else?
> 
> Joel
> 
> 
> 
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