HB75RB551B filter board blown

[Steven]

I have done a few of these ovens where lamp holder shorted and taken out the main board relays (replaced holder and pcb previously with no issues) however recently changed main board on this Siemens oven as the lamp holder shorted out! worked for a few days just had a call now to say no display after cooking – called back found track on small mains filter board had blown 651994 – and cooling fan motor 659302 was very hot! even after 20 mins of checking it over everything else had cooled down even interior yet the cooling fan motor was still very warm – . Tried to repair the track on the filter to confirm but still nothing assuming a component is shot? but what is the chances the display board would be faulty??

[electrofix]

any electrical spike could blow more than one board so yes it is possible the main board has gone as well but it may be ok that’s the problem

the track that blew is it high or low voltage side ?

bit odd about the fan motor but at least it a mains motor so a quick lead with a 3 amp fuse and you could run it for 10 mins or so and see if it gets hot

Dave

[Author]

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