Guys,
I was running trains at our local train show today there was a pop and the circuit breaker blew. On investigation of the trains I couldn't find any that where derailed.

Anyway when testing to find the cause of the fault I found out the TIU input is now a dead short. Any ideas on what could cause this and if there is a fix available for this or do I need to replace it?

I've had it for about 5 years and had no problems but I would like to get back to running trains ASAP.

Thanks,
Ben

quote:

Anyway when testing to find the cause of the fault I found out the TIU input is now a dead short. Any ideas on what could cause this and if there is a fix available for this or do I need to replace it?

I've had it for about 5 years and had no problems but I would like to get back to running trains ASAP.

Thanks,

Are all the channels shot? Did you try using an aux power supply with the other channels . If it's one of the very first TIU it may be time for another depending how much current has been passing through the thing.

I don't think you can probably fix it at home, I know I couldn't and would ship it out to get fixed , if it can't be fixed I'd just buy a new one but check out the other channels, maybe you only lost one.

I'd open the TIU up and see if you can see what is causing the short. Sometimes the input jacks can work loose and get hot enough to melt the plastic case. Check the fuses if present also. It would help if you could tell us what is the version on the bottom of the TIU, ex: I2, H1, etc.

The plastic case is fine and the input jacks also look fine. I have a power supply that is fused at 6A. It is Rev H2 TIU. The short is across the Fixed Voltage IN1 and the DC jack so I think the fault is on the internal power supply somewhere.

The internal fuses are all OK. I can't see any sign of scorched tracks of damaged components.

I will buy a new one if needed but I'd like to fix this one if possible.

Cheers,
Ben

Ok fixed it. The a transient voltage suppressor on the output went short circuit. I got one from a local electronics, replaced it and it works now.

Ben