I’ve found that following traces and identifying components that connect to either side of the failed resistor is usually a good start for finding root cause.
Shorted power transistors, diodes, or portions of bridge rectifiers have been the root cause of cascading failures in my cases. -Royce > On Apr 18, 2023, at 06:51, Tom Hunter via cctalk <[email protected]> > wrote: > > The blown out resistor likely has "blown out" for a reason. > The replacement will probably suffer the same faith unless you find the > root cause. > >> On Tue, Apr 18, 2023 at 12:20 AM John Robertson via cctalk < >> [email protected]> wrote: >> >> I've checked bitsavers.org (Al does a great job!), and a number of >> forums, but no luck finding schematics for my ADM31 that I am trying to >> resurrect. The power supply has issues and I need to identify a blown >> out resistor - the switching supply is a Boschert model 1001 date code >> 7943 Revision J. >> >> John :-#)# >> >> -- >> John's Jukes Ltd. >> 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 >> Call (604)872-5757 (Pinballs, Jukes, Video Games) >> flippers.com >> "Old pinballers never die, they just flip out" >> >>
