Forum Replies Created
-
Posts
-
Many thanks all. Machine now running again. I had to change the triac, the associated 1k resistor, the 220 ohm gate feed resistor, the darlington pair chip and of course the pump – basically everything forward from the micro, but at least that survived. It’s just done a full cycle wash and is almost good as new! Many thanks for all the help.
Dave – thanks, that was a great idea (dunno why I didn’t think if it!) The resistors are all 1k, so that’s an easy fix. Triac on order, so we’ll see if I can get it to live again.
Iadom – thanks. I come from a TV repair background where we used to repair stuff to component level, and all manufacturers used to issue detailed circuit diagrams. I just assumed white goods would be similar!
Is there any reset procedure after applying the fixes, or will it just work, assuming I’ve tracked down all of the faults? I ask because the machine used to go through 4-5 mins of the cycle before dropping to “3 minutes”, (see my OP), but it now jumps straight to 3 mins, immediately after pressing start. I don’t think I changed anything, apart from running the error check program and blowing the motor completely when I hard-wired it (it had seized solid – blew the windings when hard-wired).
Aha, thanks. I was looking for a big triac on a heatsink, not the smaller SMDs. I can now see that the triac has blown and taken out the SMD resistor (or maybe a capacitor) on the other side of the board. I can probably get a replacement triac, but since there is nothing readable on the resistor, I have no idea what value it was. Any ideas? Is there a circuit diagram anywhere with values marked?
I’ve visually checked the triac on the ‘main’ board and it doesn’t show any signs of stress, but I want to be sure I’m looking at the right board! There are obviously 3 x motors (drum, circulation and drain) – do they all have triacs? If so, I assume they must all be on different boards, as there is only ONE triac on the board I’m looking at. The PCB I’m looking at is the one at the top right of the machine, immediately behind the dial. It has edge connectors left and right, and some additional connectors on the upper face of the board (ie on the component-mounting side.) The triac is mounted on a heatsink.
Thanks. The pump is certainly duff. I suspect it may also have taken out the triac. Do you know the model (ie the original part number) for the triac?
