A question for Ian

Choppercook

Choppercook

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I have a LGB 2-4-0. 20232, 1218 Union Pacific which I have converted to battery with a 11.1 volt ESC & receiver, The circuit board burnt out, I have now had the board repaired I an now using a 8.4 volt battery but the loco runs very slow & can not get any smoke. Now can I use a 11.1 volt battery or will it burn out the circuit board again. The board runs the lot, motor, lights, sound & smoke. Can I have your input please, Thanks. Cookie.
 
I had one of these a long time ago - they are designed to run on 18v - 20v so the only limit to the size of battery pack will be the maximum voltage that the ESC can take.

They're quite weighty locos, so I would tend to go for the biggest battery pack that you can - subject to the limits of the ESC.
 
A diagram, or photograph(s) of the parts being talked about, would help?

Choppercook (Mike, if I remember rightly?)..
Which board burnt-out? - We really need to know what you are trying to achieve / connect where? :nerd:

PhilP.
 
Are Phil, It's Cookie, a A diagram of the circuit board from the service manual & a photo of the circuit board if that will help. Thanks Phil.
 

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Just a suggestion...…It normally helps to make the topic title relevant to the question/contents of the post?

Which Ian? Who is Ian? I have a cousin called Ian - should I ask him?
 
So would I be right in thinking you feed your 11.1V battery (3S Lithium?) into the Rx65c, and the motor outputs into the board you have photographed?

I will go-grab the LGB service sheets, but assume there is a soundcard either in the cab-roof, or tender?
 
Can you lay the bits out, as they would be connected, but do not connect the battery!
Just to give a visual idea of how things are going to be connected.. Can also see what components you have then. :)

(no hurry, I have a little to do in the garden, for an hour of so..) PhilP.
 
OK, a photo of the loco striped out, 11.1 volt ESC & receiver, The yellow & blue wires feeds the into the motor block which feed into the circuit board, The red & black wires go to the battery. The circuit board controls the motor, lights, sound & smoke.
 

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Right:
(Some of these questions may seem to have obvious answers, but I can't see what you can)

The blue/yellow wires go to the motor block. - Do they connect to the track connections, or the motor connections?

I assume these connections are on the 4-way connector, on top of the motor block?

You are using the original 4-way lead up to the original board?

Have you removed the pickup skates and the carbon brushes, which get power from the track?


A picture of the top of the motor block would show the connections.
 
I have you removed the pickup skates and the carbon brushes, which get power from track, the red & black wire comes from the battery to the ESC , The ESC then contacted to the pick ups of the motor block using the original 4-way lead up to the original circuit board which control the lot
 
Hi Phil I have emailed Clark Electronics Ltd who repaired the board to ask if the board will take 11.1 volts, he got back to me with

"Not 100% sure but our engineer powered it with 10v at the rectifier.

>>Supplied 10v to rectifier, dc ok.Suspect short on X2 connector o/p caused fault.

Given the info above you should make sure whatever plugs to X2 connector is not faulty."
so from will the circuit board be OK with 11.1 volts
 
The board should be fine with 11.1 volts.. - After all, it can be fed by (up to) 20-odd volts of track power.

Do you know the specifications of the ESC you are using? - Though I am pretty sure this will not be the problem.

I would NOT connect the lights, or smoke for a start.. Just try the motor.


Two observations:
The white wire to the smoke unit appears to pass under the board. - This isn't trapped at all, is it?
The X2 connections are one of the lighting circuits. - You could test this with around 6 volts of battery, to see if that light works?
Do NOT use your main loco battery for this! - Lithium batteries can supply many amps, and do much damage.

You DO have a fuse in circuit between the battery, and everything else??
 
Choppercook said:
I do not have a fuse do you think I need one & if so what size.
Click to expand...

ALWAYS! Fit a fuse.. - Especially with Lithium batteries..

One amp would probably be enough, but not more than a two amp rated fuse.


If your battery (in this case Lithium) says '20C' on it, it will quite happily supply 20x it's rated capacity.
So if you have a 2500mAh (that is 2.5 Amps for one hour, capacity) it will be capable of supplying 20 x 2.5 = 50 Amps into your pride and joy.
More than enough to release the magic-smoke. :(

Having a fuse might-well have saved you the cost of the repair.

PhilP.
 
Not being an electronic expert in anyway whatsoever, not putting a fuse in the system seems a bit rash. The other thing, it may be just the camera angle, but from what I can see, the soldered joints of the black and white wires on the front of theboard appear to be a bit poor, the black one looks close to touching the heat sink, wold that be some of the cause of your problems?
 
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