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Re: replacing neff oven element, troublesome screws any advi
Whats the model no, ENF etc? You will find this info around the door area
Re: Smeg UK80MFX1 oven switch fail
Christine
Whilst there may be no other failure evident, please take care care replacing the switch. Check the terminations at the switch carefully for poor or loose connections.
I would strongly recommend insulation testing to be carried out to eliminate other possible failure modes.
If you don’t have access to such equipment, then locate an engineer via the Repairs@ module.
If you decide to tackle this yourself, please, please pull the plug or turn off the controlling MCB or pull the fuse :zap:
Re: Advice sought to repair cooker module Electrolux EPSOPMS
I’d love to charge for training & consultancy! – about £100 per e-mail 😆
However, with all the help that I get from Dave Conway with part numbers etc, its only fair to try & help others. Besides I think everyone would agree business is tough enough without throwing the extra curves in.
Anyway, good luck with the repair – hope the customer does not give you too much grief.
Re: Advice sought to repair cooker module Electrolux EPSOPMS
Mike
I would be surprised if the new board was damaged by running it ‘off-load’. However, not knowing how it interconnects with the timer module, I guess I would have to urge some caution. What is the triac switching / controlling?
I don’t recognise the SPOBT number. The alternative way of driving the triac (from the isolation viewpoint) is with a transformer. A few years ago some nifty small pulse transformers were released known as iso-planar transformers. Some ICs included this using thick-film technology. However, I have no idea if this is still in use today.
Re: Advice sought to repair cooker module Electrolux EPSOPMS
Mike
Just read the first post again. I note that the triac had popped. Heres a thought. See what you think. The triac will probably be driven by an opto-coupler. Assuming that the triac failed shorted with either a short from MT1 or MT2 to gate, I am almost willing to bet that the opto-coupler has died. This could be pulling your 5V rail down. Also see if you can sus out how the opt-coupler is driven. Whatever drives the opto also has probably died.
Re: Advice sought to repair cooker module Electrolux EPSOPMS
Mike
I doubt the problem is fixed by replacing the caps – especially if you are getting the same volts. The LM78/9xx series regulators will run without a load. This ‘smells’ like SMDs now. If your customer is giving you hassle, you may be better off to get a new module & try to fix this one when you have a quite few hours 😆 . Since the other parts are surface-mount, then you are dead-in-the-water without a rework station 😥 If you don’t have shaky hands, you may get lucky if the smds are three leg transistors & you have a small soldering iron 🙂
Be aware that there is a risk that the timer module (left in the cooker) may also be damaged 😥
Hope it all works out. Again, be interested to know the final outcome.
Re: Advice sought to repair cooker module Electrolux EPSOPMS
Do you have access to an oscilloscope? If yes, take a look at the ripple. From what you describe, i think that that a lot of current is being pulled from the regulator. With the testing you have just done, is this with the load connected or disconnected?
Is the diode connected across the regulator output i.e cathode to + & anode to ground? In my view you may have a shorted capacitor that damaged the original regulator.
I would take the regulator out so that the unregulated side is running unloaded, check the ripple with the scope. If okay, use your meter from the 5V rail to ground and see if there is a short. If yes, then check the caps & then the ICs.
Be interested to know how you get on.
Re: Advice sought to repair cooker module Electrolux EPSOPMS
Yep. You you’ve got it. Its the regulator. RS Comps will have these. 😉 Have fun.
Re: Advice sought to repair cooker module Electrolux EPSOPMS
If you are not getting 5V out, check the regulator by replacement. Also check that the rectifier bridge does not have a shorted diode.
Regards
Re: Parts finding software.
Dave
Could I get copies from you? Shall I e-mail my address or can you e-mail the files?
Regards
Re: Diplomat fan oven
I am sure that Dave Conway through spares@whitegoods.co.uk will be able to help.
Make sure that you isolate the supply by pulling the plug or turning off the switch before working on your oven :zap:
Re: vans
Anyone know anything about the reliabilty of the Citreon Berlingo – I need to add a small van – any comments appreciated. Also looking at the Astra van – again, comments appreciated.
Thanks
Regards
Re: LG microwave light-bulb replacement?
Les
I would recommend that you post a request on the Repairs@Whitegoods module. You are quite likely to find a company that will help you.
I would urge great caution when working on Microwave Ovens. There are components inside that store energy for a long period of time (when switched-off) :eeek:
Also, if you start opening the oven covers, you will need a means of measuring microwave oven leakage.
Unless you have the know-how and equipment, please contact an apporopriately qualified individual through the Repairs@ module.
Good luck
