I finally purchased a second MS2500 (s/n CS2719) for my garage system and figured I'd at least recap them since I don't want to move these behemoths any more once they are situated! I removed the lower panel and removed both preamp input/power output boards, which were extremely easy to access. I immediately saw an issue with the right channel board. The LDR401(light dependent resistor) has two of it's four legs sticking up in the air with a 470uf polarized cap soldered in it's place. The left board has all four legs properly soldered in place with no 470uf cap. Anyone has an idea why this is? Maybe some service bulletin installs this? My first instinct is to purchase another one and restore to normal, but perhaps this is an unobtainium part and the cap is a workaround. Also, does anyone has a service manual for the MC2500? All I could find was the schematic online. Thanks!