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Got a dead Servis M9003 with module 546021601. There’s the big bridge rectifier on one end and right in front of it the big round copper coil. Now squeezed between these two components is a small resistor, probably quarter or half watt. It’s mounted vertically because it goes between the leg of a relay and the first leg of the rectifier. This one’s a bit burnt and I can’t read the colour code. The position is marked R64 on the board. If you look at Connect’s image of 5031689497619 (their part no.) you can see the blue body of this resistor peeping out.
Has anybody got the same or a similar module that they could check for me? It’s a gold tolerance band and the first ring looks to be either brown or red.
Please.
Mike.Re: Servis DMPDC H8 module small resistor value.
Bumping this because I want an answer. Anyone?
I’m sure now the first band is brown. Tolerance is 5{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} so that pretty much narrows it down to the following preferred values. I’m thinking of ordering a small pot and do it by trial and error. (EMW out of stock and would have to send old one in).
1R0 10R 100R 1K0 10K 100K 1M0 10M
1R1 11R 110R 1K1 11K 110K 1M1
1R2 12R 120R 1K2 12K 120K 1M2
1R3 13R 130R 1K3 13K 130K 1M3
1R5 15R 150R 1K5 15K 150K 1M5
1R6 16R 160R 1K6 16K 160K 1M6
1R8 18R 180R 1K8 18K 180K 1M8
It’s between the + leg of the rectifier and a relay terminal.
Mike.Re: Servis DMPDC H8 module small resistor value.
Somehow, I know not quite how, I have managed to “wake up” the old resistor and it’s measuring 18k, which seems feasible.
For those who have kindly looked at this thread, I will update when job completed, successfully or otherwise.
Mike.Re: Servis DMPDC H8 module small resistor value.
Oh well. 🙁
Anyone got a circuit diagram? Servis M9003W.
Still dead. Not getting neutral anywhere. Checked already on/off sw, door lock. Power light comes on, so there’s a neutral to that at least. Tightened up all module connectors. Patient customer, has friends who’ll take her washing in.
Mike.Re: Servis DMPDC H8 module small resistor value.
I can’t offer anything other than if power lights on and door locks then definitely module at fault. If you’ve tried changing the resistor etc then all you can do is change the board.
As I’m sure you know its the white resistors that go open circuit which stop the module functioning. 5k6 in value, if my memory serves me correctly.
Re: Servis DMPDC H8 module small resistor value.
Thanks Tim. Door doesn’t lock and bridging it made no difference. The two 6k2 in parallell read 3k1 just as it should be.
I guess it’s probably something about the module and I’ll probably have a further look at it later before giving in and sending it off to EMW. Just thought I might be missing something else in the circuit.
Mike.Re: Servis DMPDC H8 module small resistor value.
wont it be easy just change module and be done with it ❓
Re: Servis DMPDC H8 module small resistor value.
New module £112. That’s BER for one of these.
Anyway, this isn’t about having an easy life, it’s about having an interesting one.
Mike.Re: Servis DMPDC H8 module small resistor value.
Thanks Mark. Should have mentioned that I had checked it on 1st visit, and had already checked motor esp. TOC. Can’t remember if I checked heater. (Hmm).
Mike.Re: Servis DMPDC H8 module small resistor value.
Don’t know if you sorted this one but just got back from a similar model which wouldn’t start and found overheated terminals on pressure switch.
Re: Servis DMPDC H8 module small resistor value.
I seem to remember something from when I did work for GBDAR.
A mod from Servis about resistor R1 going open cct and causing dead machine. Had to replace it with higher wattage.
I cannot remember what modules it was on though. Might jog someone elses memory though.Re: Servis DMPDC H8 module small resistor value.
I just had one of these. As usual I relied upon the excellent service from our friends at EMW. All done and dusted and money in the till in 4 days.
Well done Tony.
Mike.
Re: Servis DMPDC H8 module small resistor value.
leavemetogetonwithit a few posts back wrote:Somehow, I know not quite how, I have managed to “wake up” the old resistor and it’s measuring 18k, which seems feasible.
For those who have kindly looked at this thread, I will update when job completed, successfully or otherwise.
Mike.Well, I went back with an 18k resistor of suitable size which I made up by twisting together resistors of higher value in parallell. I did a temp solder job to put it in because I wasn’t sure it was going to work. Sure enough, it didn’t work. I had carefully inspected the module for other damage including testing all triacs, rectifier, coil, some diodes and other resistors. Could not find a thing. Decided that the only way to eliminate module from calculations was to send it to EMW. So did so, sellotaping the burnt R64 to the heatsink.
Module came back with the original 18k (still badly burnt) soldered to the print side of the board.
I was a little doubtful that this was now going to work so rang Tony and expressed my doubts. He assured me that the resistor in question (although it had been o/c when I had removed it originally, remember) would be perfectly OK as it doesn’t have to carry much current. He reckoned they’d also resoldered a couple of dry joints too. He also assured me that the module would have been fully tested on a washing machine (not just a rig) before being sent out. I checked with him that if the fault then turned out to be elsewhere in the machine, I could let them have the module back and only pay the fiver or whatever it is. (So that I won’t be out of pocket at least.)
Returned to job yesterday, installed module, still same problem. No neutral anywhere. (On/off sw, lock and most other likely’s all been checked, bridged, rechecked previously remember.)
So tell customer she’s better off not throwing more money at it; not that I’ve charged her much.
She accepted that with a little persuasion, though it was a little difficult explaining to her that “her” module now no longer belongs to her (unless she wants to pay the full EMW repair charge).
So the module will be sent back on Monday and this little story will come to an end.
I’ll be thinking twice about future Servis module jobs, that’s for sure.
Thanks again for all the help and ideas put forward.
Mike.
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