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Offline Ivan  
#1 Posted : 20 February 2020 18:59:58(UTC)
Ivan

Germany   
Joined: 08/08/2018(UTC)
Posts: 102
Location: Potsdam
Not being at home to test the locomotive on the layout, I tested some newly bought with DC (12 V).
They do run, but there was no light, so I returned one to the dealer who placed it on the layout and to my surprise lights were perfectly working.Now I have the same issue with 34988; the motor runs but there is no light.I feel embarrassed to go with the same issue to the dealer again (who accepted the return of the first loco,by the way,although it was nothing wrong with it).

My question is: is it normal for Delta decoders to have light function disabled when on DC ?
(An answer on another forum claims that some Delta decoders really behave that way, i.e. no light when connected to DC battery).

I will be back home to test it on my layout only next week and feel frustrated without knowing if the light works or not.
Thank you for clearing the issue.
(All switches on mouse piano are to be set to OFF in analogue mode,I am aware of that).
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Offline TEEWolf  
#2 Posted : 20 February 2020 21:53:14(UTC)
TEEWolf


Joined: 01/06/2016(UTC)
Posts: 2,465
Originally Posted by: Ivan Go to Quoted Post
Not being at home to test the locomotive on the layout, I tested some newly bought with DC (12 V).
They do run, but there was no light, so I returned one to the dealer who placed it on the layout and to my surprise lights were perfectly working.Now I have the same issue with 34988; the motor runs but there is no light.I feel embarrassed to go with the same issue to the dealer again (who accepted the return of the first loco,by the way,although it was nothing wrong with it).

My question is: is it normal for Delta decoders to have light function disabled when on DC ?
(An answer on another forum claims that some Delta decoders really behave that way, i.e. no light when connected to DC battery).

I will be back home to test it on my layout only next week and feel frustrated without knowing if the light works or not.
Thank you for clearing the issue.


DC is "Direct Current", nothing else. A Maerklin loco does not run with DC, only with AC (= alternating current) transformed to digital current inside the loco.

Trix is running with DC transformed to digital current.
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Offline Ivan  
#3 Posted : 20 February 2020 22:04:43(UTC)
Ivan

Germany   
Joined: 08/08/2018(UTC)
Posts: 102
Location: Potsdam
Originally Posted by: TEEWolf Go to Quoted Post
Originally Posted by: Ivan Go to Quoted Post
Not being at home to test the locomotive on the layout, I tested some newly bought with DC (12 V).
They do run, but there was no light, so I returned one to the dealer who placed it on the layout and to my surprise lights were perfectly working.Now I have the same issue with 34988; the motor runs but there is no light.I feel embarrassed to go with the same issue to the dealer again (who accepted the return of the first loco,by the way,although it was nothing wrong with it).

My question is: is it normal for Delta decoders to have light function disabled when on DC ?
(An answer on another forum claims that some Delta decoders really behave that way, i.e. no light when connected to DC battery).

I will be back home to test it on my layout only next week and feel frustrated without knowing if the light works or not.
Thank you for clearing the issue.


DC is "Direct Current", nothing else. A Maerklin loco does not run with DC, only with AC (= alternating current) transformed to digital current inside the loco.

Trix is running with DC transformed to digital current.


I am fully aware of that.On the other hand,it is possible to test Marklin locomotives with DC battery.One wire to Schleifer another wire to wheels (Masse).The motor runs with Delta,even with newer decoders,but as I said and asked, it seems that in some Delta Decoders light function is not recognized when DC current is applied.
Meaning, motor runs but there is no light.
Offline RayF  
#4 Posted : 21 February 2020 00:01:47(UTC)
RayF

Gibraltar   
Joined: 14/03/2005(UTC)
Posts: 15,838
Location: Gibraltar, Europe
Do what you think you need to, but I fail to see the point of testing a Marklin loco with a DC voltage. They are not meant to run on DC, and certainly the decoder will behave in an indeterminate way, if it does anything at all.

You seem surprised that the lights won't work, but actually I'm surprised that the motor actually ran!

Ray
Mostly Marklin.Selection of different eras and European railways
Small C track layout, control by MS2, 100+ trains but run 4-5 at a time.
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Offline Ivan  
#5 Posted : 21 February 2020 08:37:06(UTC)
Ivan

Germany   
Joined: 08/08/2018(UTC)
Posts: 102
Location: Potsdam
Originally Posted by: RayF Go to Quoted Post
Do what you think you need to, but I fail to see the point of testing a Marklin loco with a DC voltage. They are not meant to run on DC, and certainly the decoder will behave in an indeterminate way, if it does anything at all.

You seem surprised that the lights won't work, but actually I'm surprised that the motor actually ran!



Thanks a lot for the answer.The idea for testing locos with DC battery came from a collector who was buying very old Marklin at flea markets and used 9V DC battery to check if they worked.
I am far away from my layout, now far from the shop I bought the locos.
Although they were tested by the dealer,I just wanted to make sure everything was OK and the only way to do it was with DC transformer.
Older models run on DC, both motor and light,newer models,too.Only Delta decoders do not recognize light function.
Thanks again.
Offline Purellum  
#6 Posted : 21 February 2020 09:56:48(UTC)
Purellum

Denmark   
Joined: 08/11/2005(UTC)
Posts: 3,498
Location: Mullerup, 4200 Slagelse
Cool

Apparently some confusion here BigGrin

Older analog locos run on AC or DC, the motor is called an "Allstrommotor".

Older DELTA locos had the same motor, and you can test the motor with DC;
but this test doesn't show you if the decoder is working - and the light doesn't come on.

Per.

Cool
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