 Joined: 14/02/2010(UTC) Posts: 141 Location: Portugal
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Hi there!
I have a locomotive roundhouse from Marklin (item 72883) and i have a problem. The leds that came with it, stoped working (after about 5 years of regular use). I suspect that the problem, lies on the circuit board that feeds the leds. I have tried a different power supply, checked the wires to no result. My question is, is there a spare part, so that i could replace the entire set?
Regards!
Miguel Nascimento
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 Joined: 23/07/2014(UTC) Posts: 8,472 Location: ENGLAND, Didcot
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Originally Posted by: arcanjo  Hi there!
I have a locomotive roundhouse from Marklin (item 72883) and i have a problem. The leds that came with it, stoped working (after about 5 years of regular use). I suspect that the problem, lies on the circuit board that feeds the leds. I have tried a different power supply, checked the wires to no result. My question is, is there a spare part, so that i could replace the entire set?
Regards!
Miguel Nascimento
I suspect that the LEDs are all in series in one circuit, and that a single solder joint has failed, or that a track has cracked on the circuit board. I would look at all the solder joints to see if one looks suspect, or if there is some corrosion or other suspect looking finish on the circuit board. One simple way you could see if this is the case is to take a pair of tweezers and carefully short one LED at a time while power is applied, and see if the others turn on. Perhaps you can post a high resolution photo of the circuit board, we may be able to 'remote diagnose' the problem. [edit] If all else fails, you could send it to me, and I could fix it, shouldn't cost too much to mail it to me in the UK. [/edit]
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Joined: 14/02/2010(UTC) Posts: 141 Location: Portugal
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Hi there!
Thank you so much for your answer. I will see what i can do, and I say something after!
Best regards,
Miguel
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Joined: 14/02/2010(UTC) Posts: 141 Location: Portugal
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Originally Posted by: kiwiAlan Originally Posted by: arcanjo Hi there!
I have a locomotive roundhouse from Marklin (item 72883) and i have a problem. The leds that came with it, stoped working (after about 5 years of regular use). I suspect that the problem, lies on the circuit board that feeds the leds. I have tried a different power supply, checked the wires to no result. My question is, is there a spare part, so that i could replace the entire set?
Regards!
Miguel Nascimento
I suspect that the LEDs are all in series in one circuit, and that a single solder joint has failed, or that a track has cracked on the circuit board. I would look at all the solder joints to see if one looks suspect, or if there is some corrosion or other suspect looking finish on the circuit board. One simple way you could see if this is the case is to take a pair of tweezers and carefully short one LED at a time while power is applied, and see if the others turn on. Perhaps you can post a high resolution photo of the circuit board, we may be able to 'remote diagnose' the problem. [edit] If all else fails, you could send it to me, and I could fix it, shouldn't cost too much to mail it to me in the UK. [/edit] Hi Alan! Just to say, that Marklin sent me the complete circuit free of charge. I see the "light" again :) Thanks! Miguel
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 3 users liked this useful post by arcanjo
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Joined: 23/07/2014(UTC) Posts: 8,472 Location: ENGLAND, Didcot
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Originally Posted by: arcanjo Originally Posted by: kiwiAlan Originally Posted by: arcanjo Hi there!
I have a locomotive roundhouse from Marklin (item 72883) and i have a problem. The leds that came with it, stoped working (after about 5 years of regular use). I suspect that the problem, lies on the circuit board that feeds the leds. I have tried a different power supply, checked the wires to no result. My question is, is there a spare part, so that i could replace the entire set?
Regards!
Miguel Nascimento
I suspect that the LEDs are all in series in one circuit, and that a single solder joint has failed, or that a track has cracked on the circuit board. I would look at all the solder joints to see if one looks suspect, or if there is some corrosion or other suspect looking finish on the circuit board. One simple way you could see if this is the case is to take a pair of tweezers and carefully short one LED at a time while power is applied, and see if the others turn on. Perhaps you can post a high resolution photo of the circuit board, we may be able to 'remote diagnose' the problem. [edit] If all else fails, you could send it to me, and I could fix it, shouldn't cost too much to mail it to me in the UK. [/edit] Hi Alan! Just to say, that Marklin sent me the complete circuit free of charge. I see the "light" again :) Thanks! Miguel Well, that is a good result, and saved a lot of hassles. Excellent news, now your preiserlings will be able to service locos again ... 
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1 user liked this useful post by kiwiAlan
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