Reverse board won't go forward, bad transistor or some thing else?

iakobosOGR Forum Member

I have a Lionel GP-38 with a 681-DREU-A reverse board in it. The other day my kids were running the engine when two tracks came apart and derailed the engine. After that there was no forward. I found that it would still cycle through the E unit sequence. For instance Power Off/On, Reverse, Power Off/On, Neutral, Power off/on, no forward, Power off/on, neutral, power off/on, reverse and etc. It runs in reverse without a problem.

I know it's something to do with the board because I put in another reverse board and the engine works fine.

Here's a photo of the board with the numbers I copied from the transistors. Are these the likely culprits or is it something else?

1/2/129:45 PM

Original Post

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