Broken Southampton Tug

[John Burgess 1Participant @johnburgess1]

Hi

My dad has a Southampton tug similar to this:

Recently it has stopped working entirely, no lights, sound or movement from the motors. We've taken it apart and discovered on the circuit board in the wheelhouse that one of the components looks like it has burnt out. See the circled component below:

We figure that this is a LDO but we can't work out the model number or type that it is. Using a magnifying glass I've managed to read a number on IC3 which is above the damaged one (AMS1117).

What I need to know is the model number of the damaged IC4. Does anyone have a wiring diagram for this boat or have one themselves that they can check the component on for us?

I'm not brilliant with electronics and I am just fumbling my way around this. Can anyone help us?

Thanks

John

[John Burgess 1Participant @johnburgess1]

[Kev.WParticipant @kev-w]

John,don't want to throw a shadow on your repair attempt, but …….

… the reason that i.c. has blown, is most likely a failed component further along the circuit.

Some very nice conversions have been done to the Southampton, that use esc's & radio gear from the more usual makers & make for an improved model.

[Mark Jarvis 2Participant @markjarvis2]

Hi John, can let you have a spare board complete out of my southampton, send me a PM with your address

Mark

[Malcolm FraryParticipant @malcolmfrary95515]

Its a linear voltage regulator, so it heats with load and supply voltage. If it was the weak link, the replacement will probably do the same eventually. If it was something down the line increasing the load, that would need to be found or it will happen again. Same if it was a voltage supply problem.

Electronic components have two main ways of failing – they either disconnect them selves like a fuse or they short themselves out. A bubbled box indicates heating, so on the way to failure heat was involved. Before finally giving up, it might have presented its load with more voltage than was needed and taken a few other bits with it.

Replacement of the complete electronic installation might be the least fraught way of getting a very nice boat back to full operation.

[John Burgess 1Participant @johnburgess1]

Hi All

Sorry for the long delay in replying to you. We've been a bit busy recently! With you mentioning that an earlier component may have failed we checked the rest of the circuitry and discovered a frayed wire that was disconnected. It looks like it should have connected to a resistor and the port motor. We will probably repair this first.

Mark, that would be really kind of you to send that. Do you want us to send you the postage cost through Paypal or something?

Thanks guys for all your help and support!

John

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