19 Apr
2023
19 Apr
'23
3:51 a.m.
On Tue, Apr 18, 2023 at 11:04 PM John Robertson via cctalk
<cctalk(a)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_Supp…
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(a)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"