On Tue, Apr 18, 2023 at 11:04 PM John Robertson via cctalk <cctalk@classiccmp.org> wrote:
> > I like to start with schematics before poking too much... So do I. > > I assume bad caps (will replace with low-ESR high temp), and possibly > blown transistor(s)... > > *And Gregory Beat sent me a link that covers the 1001 SMPS very neatly:* > > http://www.bitsavers.org/pdf/boschert/Boschert_OL25_Single-Stage_Power_Supply_Maintenance_Manual_May79.pdf > > and it was buried on bitsavers - where I went before bothering the list! That is clearly not one of the '2 stage' ones that fail in spectacular ways. It's a relatively conventional SMPSU and shouldn't be too hard to sort out. -tony > > Thanks folks! > > John :-#)# > > > > > > > > >> On Tue, Apr 18, 2023 at 12:20 AM John Robertson via cctalk < > >> cctalk@classiccmp.org> 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" > >>> > >>> > > -- > 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" >
