MTH 30-1402-1 LNE Camelback Lighting Problem

The classification light is just lite from the Headlight bulb correct?  Some times the screw bulbs can be hard to get good contact.  Does the coupler and reverse light work?

 

If no coupler and lights the board has a damaged trace which is repairable.  If coupler and reverse light work, could be a tether broken wire or the bulb not screwed in all the way or not making contact.   G

Thanks for the quick response.  The classification lights are the green LED's on the smokebox front next to the headlight.  They are a separate circuit, independent of the headlight.  The coupler, reverse light and tender marker lights all work.  

 

Thanks

Scott

That sounds like a possible loose tether issue.

Thanks guys, I will start looking for the culprit.

 

Scott

The MTH instructions don't show that set up, but MTH started using a small PCB as a short cut for a MUX.  Can you post a pic of the marker and it's board?

 

They still are powered from the same headlight source if it has this small PCB board.  So find why the headlight doesn't work an the marker may come on.

 

Picture would help me help you! G

 

 

 

 

OK, here are a few photos of the inside of the locomotive.  The wires with the yellow connector are for the class lights and the purple connector are for the headlight.  They do lead to a circuit board directly behind the smoke unit.  I hope this helps.

 

Scott

Is this a Premier or RK version?  That is the MUX board. So a signal is sent from the tender MUX board so that 2 lights in the engine can be controlled from 1 light wire.

 

This is more complex to trouble shoot, but as mentioned you need to make sure you have continuity from the tender through the harness to the engine.  After that if you know the bulbs and markers are good, it is a MUX issue most likely in the engine.

 

Do you have smoke working and speed control?  If so, the light fet or the chip is bad.

 

I have a replacement board.  This takes some swapping of parts though to isolate the issue.  Might be best for a tech to do, unless it is the harness.

 

Possibilities are PS-2 board FET bad, Mux bad, harness bad, Engine PCB solder joint, wiring.   G

Thank you for looking at the photos. The engine is Railking. Smoke and speed control are working perfectly. Only thing that is not working as far as I can tell is the headlight and class lights.

Scott

I take it the interior cab light is out too?  Normally MUX in premier, but some higher end RK do have it.

 

You can check the 10 pin plug that those wires go into. The small pcb might have a bad solder joint.

 

Did you test coupler?  Does reverse light come on?  G

Cab light comes on, rear coupler works and rear headlight comes on. I looked the board over but I will give it another look. Are these MUX boards available from MTH?

Scott

Should be, but I don't know if it meets the tech only trigger.  I have one in stock.  You can contact me via my profile.

 

This is a little weird now.  The marker is off 5V and the headlight off + voltage, but Interior light still works.  Since reverse and coupler work, the + V trace on the PS-2 board is OK.  Changing MUX is probably best at this point.  G