TVR1707822112 Posted June 9, 2022 Share Posted June 9, 2022 HiDoes anyone know if Class 50 R2429 Superb was affected by the faulty class 50 PCB? I can see from images of the correct PCB that mine looks different, though any help is appreciated.Thanks and best wishes Link to comment Share on other sites More sharing options...
LMSFan72 Posted June 9, 2022 Share Posted June 9, 2022 Do you have the revision number/markings on the board? I might have a spare I can check. Link to comment Share on other sites More sharing options...
TVR1707822112 Posted June 9, 2022 Author Share Posted June 9, 2022 Hi LMSFan72. Where would I find these please? It says on it 1621-X009R1 if this helps.Best wishes Link to comment Share on other sites More sharing options...
LMSFan72 Posted June 9, 2022 Share Posted June 9, 2022 That’s it. I’ll check what I have tomorrow! Link to comment Share on other sites More sharing options...
LMSFan72 Posted June 9, 2022 Share Posted June 9, 2022 Link to comment Share on other sites More sharing options...
LMSFan72 Posted June 9, 2022 Share Posted June 9, 2022 I just posted a picture of the trace I did of that board but I did it off my phone. It might not come out well once approved but we’ll see.Looking at it it doesn’t have the problem that the R6 version had (where the positive pin on the decoder was connected to the -ve on the light circuit). Is that the problem you are meaning? Link to comment Share on other sites More sharing options...
TVR1707822112 Posted June 9, 2022 Author Share Posted June 9, 2022 HiI can't see the image - perhaps still being approved? 🤔I've no clue what caused the issue i'm afraid, me being on DC, this loco is currently undergoing an overhaul so I'm trying to find out what the issue is before I end up exploding a top of the range DCC sound decoder!Best wishes & thanks for your help so far! Link to comment Share on other sites More sharing options...
LMSFan72 Posted June 10, 2022 Share Posted June 10, 2022 Hi TVRThe image is there now. I also checked and had a board on a bare chassis (no lighting attached). I put a decoder on it and it works no problem. I don't think you'll have any issues with this board. Link to comment Share on other sites More sharing options...
TVR1707822112 Posted June 10, 2022 Author Share Posted June 10, 2022 Thanks for this, LMSFan72I can confirm that the PCB on my model is different to the one in your illustration which is weird. I'm gonna email Hornby because it has Mazak rot... Yay.Thanks for your help though, I truly appreciate it!Best WishesTVR Link to comment Share on other sites More sharing options...
ColinB Posted June 10, 2022 Share Posted June 10, 2022 So what is the issue with the PCB? I have 3 of these so it would be nice to check. Mine all work with DCC and the lights work so I assume that they are ok. I didn't know this model suffered from Mazak rot as well. Link to comment Share on other sites More sharing options...
TVR1707822112 Posted June 10, 2022 Author Share Posted June 10, 2022 Have a look around Colin. It's quite well documented, especially on other forums. I'm not sure what the issue is, I'm afraid, but from what I can tell earlier models used to fry decoders!Hope this helpsBest wishesTVR Link to comment Share on other sites More sharing options...
Going Spare Posted June 10, 2022 Share Posted June 10, 2022 @ ColinBThe loco is included in the downloadable list of all known models from all manufacturers on the RMweb thread "Zinc Pest (Mazak Rot); The Affected Models List": it is quoted as being affected by the chassis cracking under the cab floors. Link to comment Share on other sites More sharing options...
LMSFan72 Posted June 10, 2022 Share Posted June 10, 2022 So what is the issue with the PCB? I have 3 of these so it would be nice to check. Mine all work with DCC and the lights work so I assume that they are ok. I didn't know this model suffered from Mazak rot as well. Some of the early boards had the light negative connected to the common positive pin on the socket, instantly creating some magic smoke. I traced that board in a different thread. If yours is working on DCC then you’re good! Link to comment Share on other sites More sharing options...
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