zanussi dishwasher zdf2020 resistor value on pcb?

[RHrepairs]

Well lads, have a zanussi dishwasher zdf2020 here, not lighting up….further inspection the resistor (r45) isnt reading and the colour bands have all faded so has anyone got a board handy to tell me the vaule/colour band

[Hollytree_Technical]

Re: zanussi dishwasher zdf2020 resistor value on pcb?

I don’t have a board available to look at but looking at the image the resistor would not have had any colour bands, instead it would probably have had the value printed on it (not on the underside is it?). It is a fusible resistor (as I expect you knew anyway) and looking at the data sheet for the microchip it looks like they may have followed the sample circuit fairly closely which would suggest that it would be 8.2 Ohm at 2W although I doubt that it would matter if the resistor was a slightly higher value.

I would also replace the inductor L3 as it appears to be spewing its guts out of the side (has probably gone short circuit – looks like it may be a 1mH with 5{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} tolerance, not sure whether you can get away with a 0.2A or if it needs a 0.3A) and the U2 microchip (LNK305GN).

In all it looks like it is a similar power supply design as that used on the Whirlpool washing machines (see PCB repair thread), it just looks like a slightly higher current version.

Jem

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