Loco gone dead after CV updates

dunnyrail

dunnyrail

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Have been updating Cv’s predominantly 3 and 4 to sort out so that all locomotives on my friends layout run in a similar manner. Also CV 5 top speed has been altered to get things to a slower top speed on a complex line with lots of blind spots so that the trains do not run away.

He is of the direct with no momentum start immediately and stop the same hence revising these CV’s. The loco in difficulties (the only one of around a dozen or more sorted) is the LGB 22440 with LGB on board Sound Chip pictured as below.

So CV 3 and 4 have been set to 0 as have his other locomotives. CV5 had the top speed adjusted from 255 value to 75 value. This killed the loco.

Despite putting things as they were Loco still dead.

On doing a factory reset (CV55 value 55?) nothing has altered, loco still dead and the Loco Number CV1 not returned to default value?

Have looked at CV29 and revised this to value of 4 and the loco does work OK on analogue.

So once again HELP.

EDIT Oh forgot to add an the Dimax the loco is 28 speed steps but I have tried all options with no effect.
 

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Jon, might there be two decoders in this particular loco?
One for driving/functions, and a separate sound (only) decoder.

PhilP
 
Thanks for quick replies guys.
Greg Elmassian said:
Can you read any CV in service mode? (I'm guessing you are using POM?)
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Am using a Programming Track and the Programming function from a Massoth Central Station.
PhilP said:
Jon, might there be two decoders in this particular loco?
One for driving/functions, and a separate sound (only) decoder.

PhilP
Click to expand...
No just a single decoder, no sound. Loco has the silver D sticker underneath. I looked at this earlier and thought it was sound but looked at it again just now and just D.
 
dunnyrail said:
is the LGB 22440 with LGB on board Sound Chip pictured as below.
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Are you sure this doesn't have a SUSI sound board? Did you open it up to check? I had all sorts of trouble changing CVs in my 27402 Blue Croc until I disconnected the SUSI connector between the LGB Onboard decoder and sound board. The 27402 has the LGB silver "D" "MZS MTS" digital label. I was using a Massoth PC module. I could change the all the basic decoder CVs including a decoder reset once the sound board was disconnected.

Keep in mind there is no decoder interface board when the LGB "Onboard" decoders are involved. Power in, motor out and lights all plug directly into the decoder board. If there are two boards piggybacked, the second is the SUSI sound board.

By the way I would recommend you reset breaking and acceleration CVs 3 and 4 to the default value of 3. Your friend will not know the difference between this setting and a setting of zero. The loco still responds immediately to speed change inputs but this is probably ever so slightly easier on the drivetrain.
 
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phils2um said:
Are you sure this doesn't have a SUSI sound board? Did you open it up to check? I had all sorts of trouble changing CVs in my 27402 Blue Croc until I disconnected the SUSI connector between the LGB Onboard decoder and sound board. The 27402 has the LGB silver "D" "MZS MTS" digital label. I was using a Massoth PC module. I could change the all the basic decoder CVs including a decoder reset once the sound board was disconnected.

Keep in mind there is no decoder interface board when the LGB "Onboard" decoders are involved. Power in, motor out and lights all plug directly into the decoder board. If there are two boards piggybacked, the second is the SUSI sound board.

By the way I would recommend you reset breaking and acceleration CVs 3 and 4 to the default value of 3. Your friend will not know the difference between this setting and a setting of zero. The loco still responds immediately to speed change inputs but this is probably ever so slightly easier on the drivetrain.
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Opened it up before my last post so no second decoder just the original 1 LGB onboard board as bought. Actually even though cv’s 3 and 4 were at 3 on many locomotives the set to 0 made quite a difference surprisingly. At full value (255) the locomotives would probably circumnavigate the whole layout, not what you want when stations are 40ft or less apart.

Greg Elmassian said:
So you did not explicitly say, can you read ANY CVs at all in service mode?

If so, which, and what values do you get?

If not, time to open the loco and verify wiring and what Phil said.

Greg
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Thus far all the Cv’s I have attempted to read on this loco were read but I have not attempted to go everywhere as we only need to change acceleration, deceleration and top speed. Cv’s 3,4 and 5. Have to say CV 6 always confuses the hell out of me and I have not needed to delve into other CV’s to do those revisions.

Cant remember what CV29 was before the update to 4, think it may have been 16 but either way the loco would not run except on analogue after it was changed to 4.

Shed has kindly Pm’d me where I may have been going wrong with a factory reset so will try that today to see what occurs.

EDIT CV list.
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UPDATE - all working fine now.

Thank to John (Shed), he suggested that I added 32 and existing value (4) to CV 29 making 36, this got things working ok so a happy result thanks to him and all for your suggestions. I think we lucked out here as the value of 16 plus 20 is what got things going again! See values post #7.
 
So 36 is long address and 14 speed steps
20 is custom speed curve and DC operation (additional, still works with DCC)

So, that is interesting. Perhaps all your locos or system is 14 speed steps. I do not remember what your system is, but perhaps note that 14 speed steps may be required for your system.

I am surprised about the long address, but I only use long addresses myself, to tie to the loco number.

In any case congratulations!
 
Greg Elmassian said:
So 36 is long address and 14 speed steps
20 is custom speed curve and DC operation (additional, still works with DCC)

So, that is interesting. Perhaps all your locos or system is 14 speed steps. I do not remember what your system is, but perhaps note that 14 speed steps may be required for your system.

I am surprised about the long address, but I only use long addresses myself, to tie to the loco number.

In any case congratulations!
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Thanks Greg. Not all the system just that and another loco or two with LGB generic decoders as shown with values in Post #7 LGB (now quite old) decoder. This line has Massoth, them, Massoth and latest Maerklin Decoders all working from a Massoth Base Station now quite old in itself. Not upgraded since pre 2013 as it came from the Ruschbahn.
 
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