Cab lights with a function chip, head scratching.

[Nodrog1826]

Frustrating day yesterday, decided to go for cab lights on when standing function on Loco 619, had it all worked out.
Easy option prototype for when I start on the Crok.

Bench test on a spare F8s chip, to set up the CV.s on outputs A5 and 6, 150's and 160's groups, all working, so that the lights activate on the headlight option, but only the leading cab light comes on when loco at a stand.

So set up the chip that is already in the loco for the Auto Couplers, made a plug in wire, connected it up for a test, and hey presto.

Turn on the lights and the auto couplers work at the same time, on 0 as well as 16 which is what they are set up to do, but no cab light..

There has to be a conflict between the LGB chip(s) and the Massoth function chip, but can I figure it out.



Anyhow it's all reset to the way it was, and the loco is back together.

 

[muns]

Sorry Gordon, I do not follow...it may be cos I have had a "not so good" day in London town/

 

[Nodrog1826]

Not to worry Mark, I can live with it.

The idea was to use the A5/6 outputs on the chip to set the leading cab light in the loco to come on, when the loco stops.
Normal function for the lights, all activate, just plonk the loco on the track, switch on the lights, leading cab light goes out when you drive off.

So that is what I set up on the spare chip, even did a coupler install on the bench test, which worked, light on turn throttle light off.

The instructions say it is workable, the bench test confirmed it was set up.

Just when I set up the chip with the same Cv's as the test one, turn on the lights and the auto couplers lower, turn then off and they raise
Select the coupler function (16) and they work normally, without affecting the lights.

If I could just figure out what all the LGB 28434 onboard chip CV's are, as you don't get a list with the instructions, like you used to.
Just there are a lot of spare plugs on that chip, if I could just figure out what they are , and what CV's control them.

Seen its done elsewhere, but for me it maybe a tweek too far...

 

[Deleted member 1986]

Gordon is it this decoder?

https://drive.google.com/open?id=0B6_2wAO6JzxFMTZWcWhTVmFQSGM

 

[Nodrog1826]

Does not look as if it is.

Photos (sorry for the poor quality) of the set up I have....Looks like a "Large LGB Onboard" decoder

Sound chip RH-Function chip LH, as built.

Msasoth F8s for auto couplers I installed ctr.



Close up of the spare sockets on main chip, when I tried to add the coupler...

 

[PhilP]

Looks like an original LGB board to the left-rear, with sound. A Massoth 8FS decoder to the centre-front, and a LGB large onboard decoder to the right..

??Is one of these units responding to serial commands??
What happens if you press F1 on your controller, once?
What happens if you press F1 twice, with a slight pause between presses? - Do you get the F2 function/sound?

 

[muns]

That's what is known as a LGB Large Onboard decoder. CV details attached.

 

[Nodrog1826]

F1 generates the loco whistle, after a few seconds of pressing the key, so much so that I have on occasions re pressed it thinking I have not applied enough pressure, the only sound that has a pause BTW, others are press and play, it has been that way since new, not noticed any other action with double press of F1. All I have done is swapped functions 6 and 8 over, sound off to match Massoth setting (6) and a sort of compressor sound is now on 8, and added the function chip and couplers.

Anyhow it's all re assembled and away for the moment, won't get another chance to look at it until after the Bank Holiday, someone else has plans.

Given serious thoughts to ripping to the LGB circuits and replacing with Massoth XLS or the new Sound onboard, when it comes out.

Think I need one of those chip reading/updating gizmo units, which leads to another question, what are people using for the 2 amp power supply?

 

[PhilP]

If you mean what power supply are people using for the DIMAX PC Module?
Then, in my case, I am using a DCC Supplies EN61558 transformer..
This has a moulded mains lead attached, an internal fuse, and screw-terminals for the 15V 1.0Amp output.

The transformer says made in Germany, and has a reassuringly heavy feel to it. - I leave it connected with a length of (equivalent) LGB 2-core cable.