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Offline obb_taurus  
#1 Posted : 02 June 2025 03:58:52(UTC)
obb_taurus

Canada   
Joined: 09/05/2006(UTC)
Posts: 140
Location: ,
Hi Everyone,

With a new motor en route to replace the Sinus motor in my currently dead 39572, I'm close to starting the project of fixing the locomotive. One thing I was wondering about, I am using the 51957 adapter plate from ESU as the replacement board and will be make-shifting something to get the engine room lighting to work but one thing I'm wondering about is since I will be connecting those to an auxiliary function, do I still need to add a resistor or is that built into the 51957. I'm assuming it's probably built in because of the front and rear lights but then again, assuming is a very bad idea. BigGrin

Thanks
Mike
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Offline H0  
#2 Posted : 02 June 2025 14:47:53(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 15,448
Location: DE-NW
Originally Posted by: obb_taurus Go to Quoted Post
I'm assuming it's probably built in because of the front and rear lights but then again, assuming is a very bad idea. BigGrin
Why should a general-purpose decoder board have resistors for LEDs built-in? They don't know how many LEDs you will connect or if you will use light bulbs.

Some locos have resistors on the LED boards, some locos have resistors on the decoder board. Better add resistors for the first test - unless you can positively identify resistors on the LED boards.

Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
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Offline Dave Banks  
#3 Posted : 02 June 2025 22:04:04(UTC)
Dave Banks

Australia   
Joined: 08/03/2006(UTC)
Posts: 1,044
Location: Gold Coast, Australia.
This is the lighting board in question:

[img]UserPostedImage[/img]
D.A.Banks
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Offline kiwiAlan  
#4 Posted : 02 June 2025 23:25:34(UTC)
kiwiAlan

United Kingdom   
Joined: 23/07/2014(UTC)
Posts: 8,490
Location: ENGLAND, Didcot
Originally Posted by: Dave Banks Go to Quoted Post
This is the lighting board in question:

[img]UserPostedImage[/img]


Well, that definitely has a resistor on the board.

but Mike is looking at replacing the board that those pogo pins contact, which will make life interesting.

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Offline H0  
#5 Posted : 03 June 2025 08:10:45(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 15,448
Location: DE-NW
Originally Posted by: Dave Banks Go to Quoted Post
This is the lighting board in question
There are also front and rear lights.

Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
UserPostedImage
thanks 1 user liked this useful post by H0
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Marklin 39572 DOA (General MRR)
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