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BrianP Senior Member Joined: 30/03/2017 Location: AustraliaPosts: 292
Posted: 02:04am 29 Aug 2019
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Here is a request for what I guess would have to be an Aussie based response...
One of my friends has a (very old now) St. George kitchen stove in need of repair. Now before anyone jumps in with "how does this relate to micros etc." it does have what appears to be a chip-based board to deal with the sensor probe for the oven. As is usual for this extra wiz-bang stuff it has never been used & never will be.
HOWEVER: this board has stopped working & was preventing the main oven from working (it has a triac controlling the main oven element & a chip controlling the triac which is my weak excuse for posting here). So we bypassed this board (in layman's terms - shorted it out). Now the main oven works BUT we have several issues with indicator lights working back-to-front & can't turn off the warming drawer.
The main difficulty we have with dealing with this is: this stove was at the time the top of the list product in Oz. As such it has a very complex ANALOG wiring structure - switching of the neutral line to various areas as well as switching the actives, & none of the internal wiring is labelled. I NEED A CIRCUIT DIAGRAM! (if it was digital I I could cope - but analog & no labeling?)
To cut to the chase - can anybody suggest a source for a circuit diagram for a St. George Galaxy model U81 or U86. Dr. Google doesn't help.
Sorry for taking up valuable forum time & space, but I know you guys are awesome & who knows - one of you might be old enough to have one of these stoves & it just might have a readable circuit pasted on or inside the back (this one doesn't). (We are are quite OK with paying for valuable time expended).
Cheers Brian P.
CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2171
Posted: 08:55am 29 Aug 2019
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This is an interesting subject. I modified an oven a year or two back to do my re-flow. I too found the analogue circuitry a nightmare - I ended up removing all the wiring and re-doing it from the triac forward with my own controller on the back end and it remains faithful (if little used) to this day and it is lovely knowing precisely how simply everything works with just a mite providing all the control intelligence.
Your situation is a little different would it be realistic would it be to replace the controller? The heating elements etc. are simple beasts and a few temperature probes scattered around would let you know when to switch them off and maintain a given heat.
Just wondering... it sounds a big deal but if you have three or four elements that is only a small interface board and a bit of control - the really difficulty is utilizing the existing controls... that wasn't a problem for my solution Edited 2019-08-29 18:57 by CaptainBoing
palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 2006
Posted: 10:01pm 29 Aug 2019
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I worked in the appliance industry all my life and must say St. George were a very well built oven. I can understand your problem, I have seen ovens so overdone with electronics it is not funny. I think St. George were taken over by Kleenmaid maybe you could ring their service centre if they are still around. Failing that try an appliance repair centre, I don't know where you are but if around Sydney try All General Whitegoods."It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"
BrianP Senior Member Joined: 30/03/2017 Location: AustraliaPosts: 292
Posted: 11:43pm 29 Aug 2019
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Ta for that. Yes, St. George is (was) a very well-built product. Compare that with most of our Asian neighbor's stuff. Kleenmaid is long gone too it seems. I'm down in southern Vic. but I might try some appliance centres. Most of these however usually have the attitude of "not interested - too old - buy a new one", however just occasionally you come across someone who also wants to try & save our planet & is helpful.
@CaptainBoing - If it was mine I would have had a 'Mite glued on the back long ago. This one lives 200k away & going down that path would be just a little over the top. I think what happened is in our efforts to sort out the maze of un-labeled wiring we made some changes before we got to the temp probe electronics & basically we now don't know what we did . Hence the need for the *!%$ wiring diagram. Fault finding with analog is fine if you know what wires go where - with digital you generally only have to deal with the numbers .
The journey continues...
B
PeterB Guru Joined: 05/02/2015 Location: AustraliaPosts: 655
Posted: 02:50am 30 Aug 2019
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Sorry for taking up valuable forum time & space, but I know you guys are awesome & who knows - one of you might be old enough to have one of these stoves & it just might have a readable circuit pasted on or inside the back (this one doesn't). (We are are quite OK with paying for valuable time expended).
Don't be b****y silly. You have come up with a worthwhile interesting project.
Peter
BrianP Senior Member Joined: 30/03/2017 Location: AustraliaPosts: 292
Posted: 07:07am 30 Aug 2019
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PeterB Guru Joined: 05/02/2015 Location: AustraliaPosts: 655
Posted: 07:29am 30 Aug 2019
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There are many people claiming to sell spare parts for those things. Is it possible one of them may be able to help ? However your part number didn't turn up anything, is that the best you can do?
Peter
BrianP Senior Member Joined: 30/03/2017 Location: AustraliaPosts: 292
Posted: 09:22pm 30 Aug 2019
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It's a work in progress - as time permits looking is continuing...
B
palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 2006
Posted: 01:43am 31 Aug 2019
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@ BrianP
If you are desperate I will see if I can ring some one I know who is still in the industry and see if they have one, he runs a large service company that repairs St. George. No promises as I have not worked in the industry for 10 years.
Paul."It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"
BrianP Senior Member Joined: 30/03/2017 Location: AustraliaPosts: 292
Hold everything - we've found one! And close to home too. Would you believe how fate works in many strange ways - a mate of the owner who lives not very far away from him has an identical stove sitting on his front verandah waiting to go to the tip. What a gold mine for spares (the parts that still work that is) & lo & behold the user manual with wiring diagram is there with it!
So I think we are done (just found out about this). Thank you everybody for your interest - now we'll see what happens next. I don't have an excuse any more...
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
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. Hence the need for the *!%$ wiring diagram. Fault finding with analog is fine if you know what wires go where - with digital you generally only have to deal with the numbers 
.
