Korg Poly800/EX800 Users

I don’t see any way that D1/R1 and the CR2032 could affect the –5V rail. I think Q1 could mess up the ground line for both +5 and –5 and make them both look bad. Once D2 burns up and opens up, Q1 would be the next thing to go.
Don B.

From: studio_1a@... [korgpolyex] 
Sent: Friday, February 1, 2019 12:10 PM
To: korgpolyex@yahoogroups.com 
Subject: Re: [korgpolyex] Re: Korg poly-800 diode info

  

Hi Don, 

the 596-4 board does have a battery soldered and hotglued between IC18 & IC19 as well like previously mentioned D1 & R1 in place and soldered. The preference would be not to re-install the patches everytime, so then I should just remove D1 & R1 if the battery is present, hypothetical question could this have affected the -5 rail? I've measured the T1 transformer and will check the L1 coil next but all other rectifying diodes check out ok. On, transistors I've tried to cross reference those parts but some more obscure parts came up..I will try to source the original parts on ebay this way I won't have any doubts.