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Lionel Desk Lamp Repair

Lionel Desk Lamp Repair


Hello its Steve. After watching and enjoying Youtube videos from Mr Carlsons lab, Electroboom, The 8 bit guy and Great Scott I decided to make this video for educational purposes. I thought sharing what I learned on my adventure might help someone else. A word of caution: Opening up an electronic device can be dangerous or even fatal without knowing proper electrical safety techniques and training. If you attempt anything you see in this video you do so at your own risk. If you have to think about this statement,
find someone that is qualified to work on electrical devices that can help you. Here we have my Lionel train lamp made by KNG America. When my lamp quit, my wife looked around online to simply just replace it with something else. Then she discovered that this lamp was licensed for a limited time and the only used models were available on e-bay and selling quite
well. Rather than an ugly table lamp or potentially buy someone elses problem, I opted to repair my lamp. I knew I would need to open up the base of the fixture to see what might be wrong. After removing power, I first peeled off the little sticky rubber feet and set them aside in a clean plastic tray. I would need to re-apply these later with a little dab of rubber cement when repairs were completed. Next I removed eight coarse screws to expose the circuits inside of the lamp base. Much to my surprise, I found a small high
voltage daughter board that contained a fuse that was clearly blown. I checked all the diodes on the board with
my VOM to insure they were good. I matched the one amp fuse and replaced it. I gave the lamp a try in hopes that this was
the issue. The lamp was on and all the train and sound system functioned but the bulb would not turn off. The circuit that turns on the light bulb is
nothing more than an opto-isolator with an SCR or silicon controlled rectifier. The gate of the T106D1 SCR is switched on
by a Cosmo 1010 opto-isolator. I knew either the opto was being forced on or the SCR had failed. I first dug around the internet to get the
data sheets for the old legacy parts. I then went to www.NTEinc.com and cross referenced each of these devices. I found each was available and the component values and package pin outs were the same. As Newark Element 14 is a distributor; I ordered one of each component. I recommend if you need these parts to CALL Newark or your preferred NTE distributor to insure they can get these items. Dont be a bit surprised when you find out
the ground shipping will cost you more than the six bucks worth of parts. The actual repair was simple. I noted the physical orientation of the old
SCR. Next I simply unsoldered the three pins of
the TO-202 package from the circuit board and then soldered in my new NTE 5457 SCR. I went back over my work trimming the leads and cleaning any extra flux off the joints for a professional looking repair. After re-assembling the lamp unit, my Lionel train lamp once again works like new. Part numbers as well as links to NTE and Newark are in the description below. Thanks for Watching. Captions By Steve 🙂 Because not everyone can hear.

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