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new member needs help with PS1 bottom board

ajmdreammg42ajmdreammg42OGR Forum Member DIGITAL SUBSCRIBER

Hello all,  Just joined mainly cause this sight seems to have the most knowledgeable members concerning the issues with the proto boards. I have a MTH U.P. gas turbine with what I believe is a Proto 1 bottom board that is bad. It has a smoked resister and what looks like a transistor beside it ( Transister is orange and marked EAS-5 Japan A 9528)( The resister has totally broken down and cannot read the color code to get the ohm value) . It was running when I took it apart, but it was smelling like burnt plastic when I found the issues. I was wondering if anyone has a extra good bottom board or a bad one I can rob parts from ? I can do the soldering myself. It has some of the traces bad but I was planning on just jumping them with wiring.  I will try to post some pictures of the damaged board in a little bit. I was reading some of the posts here about upgrade kits to a PS2 system but I am unclear about a conversion from a PS1 to a PS2 and where to find a conversion kit. I looked at the MTH web sight and they only have these expensive PS3 conversion kits. I do not have a fancy command system and only some old Lionel ZW transformers and recently got a MTH Z-4000 transformer. I have several other MTH trains need fixing also so I would really like to learn how to fix these myself, PLUS I would like to teach my 8 year old son on how to repair trains. We have really bonded with the toy train hobby.

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MH Mellow Hudson MikeOGR Forum Member DIGITAL SUBSCRIBER

Before you proceed you may want to take the time to back up one step.  It's important to determine exactly what caused the electronics to fail in the first place.  Otherwise your repairs are likely to go up in smoke too.  What you're seeing is most likely a symptom and not the root cause.

So, what is the root cause?  Start with answer to this question: Which function doesn't work anymore now that the components have died?

Mike

Last edited by Mellow Hudson Mike
ajmdreammg42ajmdreammg42OGR Forum Member DIGITAL SUBSCRIBER

Well I am not sure all what worked or not, at the time I only had some old Lionel transformers that I updated with new diodes and internal C.B.- I did not have the MTH Z-4000 yet. It ran forward and backwards and the horn and lights all worked. We just started to notice a burning smell and figured out it was coming from the gas turbine and I quit running it, took it apart and noticed the bad/burnt components. The resister did look like it had a "cold solder joint" and I figure that was probably the issue and its mounted and electrically connected threw a board trace closely to the transistor probably giving it problems. The resister was definitely over heating. 

Dennis-LaRockDennis-LaRockOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Be patient someone will come along who may have the board... a lot of PS-1s have been converted.  Additionally, for the '96 Gas Turbine and other PS-1 locomotives you may want to look at the PS-1 Trouble Shooting Guide...

https://mthtrains.com/sites/de...shooting%20chart.pdf

If you see a white battery in a PS-1 locomotive, get rid of it and install a new MTH green battery or any high quality battery.   Make sure whatever battery is in it is charged and can hold a charge... if not, install a new battery.

Last edited by Dennis-LaRock

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