Mattel Talking Engine repairs.

HI all.
I was wondering if if could get some help repairing a Talking Victor.
When I turn him on he talks great, clicks into driving mode, but the engine doesn't drive.
I have pulled him apart and tried his engine with a AA battery and it works.
My guess is that there must be a switch / circuit that is not sending the pulse to tell it to drive.
There are no broken wires.
This thread may already exsist, but I can't find it.
I hope someone can help.
Many Thanks in advance
AOF

[ripley802]

There is usually a small switch under the wheels, I believe on this one it is in the rear portion. It is sort of a safety switch so that the train has to be flat on the track before the motor can engage. To test it the switch is the issue you can put a small wire or something metal between the switch leads or wires and see if it works. I have removed the switch completely in the past and just left the two wires connected together.

I know about the switch.  
When it is fully together and on the track it makes the talk and doesn't drive.
Sorry, should have explained it better.

A small video to show you

HI Ripley802. Did you see the video on my last post? Any ideas on how to fix this.
I have another 3 in a box that are like this and I just wish I could fix it.
I would really appreciate the help.
Many Thanks

[ripley802]

Sorry about that I completely missed TnA last post. My best guess is it may be a small resistor on the circuit board that has gone bad. I had similar issues with two TnA engines and once I replaced the component on the circuit board it started working fine. These can sort of be a pain to replace if you do not have a good soldering iron and a solder extractor.


Here is the component that was bad on the TnA engines I mentioned. You may be able as a test to put a small piece of wire or a screwdriver across the two ends to short it to test if it is bad:

Thanks Ripley802
When I do this the wheels do start to turn on train.
Should I soldier a piece of wire between them?
Thanks so much for your help

[ripley802]

Can you see any numbers on the part? They are sometimes very hard to see but we may be able to find a replacement which would be ideal. I am not sure if the wire would cause other issues down the line.

It does

HAd a look locally and I can get a BC550
https://www.jaycar.co.nz/bc550-npn-transistor/p/ZT2160

[ripley802]

Have a look at my TnA thread over here:
https://www.blueplastictracks.com/showth...364&page=5

I went though several hours of trial and error with these and they are very specific as far as model and number on them. I may have some I believe of this number.