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QSI Decoder Wiring Information
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Wil Davis
My friend has an early BLI PRR M1 that has a QSI decoder. I am unable to read the decoder, we have tried resetting the decoder with no luck. All it will do is sit on the track and make idle steam engine sounds. None of the functions work, headlight, bell etc. Nor does it move. He has asked me to replace the decoder with a current steam sound decoder. I told him I would, if I could do it without taking the engine apart. The tender has the Decoder that appears to be a "motherboard" that it plugs into. It connects to to the engine with a six wire double ended female connector. I have determined that the outside wires are track pickup. However, I am unable to determine what the other four are other than two obviously go to the motor and two go to the headlight. I have tried everything I can think of to figure them out without blowing the headlight. I know I could probably hook a 9v battery to the motor and determine if it works. However, if I guess wrong and connect it to the headlight I may blow it. I once saw wiring diagrams for some engine/decoders, but am not able to find it.
Anyone have any idea where i could find this information or know what the middle four wires go to? Thanks, Wil |
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It may be stuck in its "disconnected" or its idle mode. I can't recall what function button it's on... hopefully he still has the manual that will tell him what to try. Craig Zeni Cary, NC Despatched from my infernal Android On Mon, Jul 22, 2019, 17:05 Wil Davis <wdavis5069@...> wrote: My friend has an early BLI PRR M1 that has a QSI decoder. I am unable to read the decoder, we have tried resetting the decoder with no luck. All it will do is sit on the track and make idle steam engine sounds. None of the functions work, headlight, bell etc. Nor does it move. He has asked me to replace the decoder with a current steam sound decoder. I told him I would, if I could do it without taking the engine apart. The tender has the Decoder that appears to be a "motherboard" that it plugs into. It connects to to the engine with a six wire double ended female connector. I have determined that the outside wires are track pickup. However, I am unable to determine what the other four are other than two obviously go to the motor and two go to the headlight. I have tried everything I can think of to figure them out without blowing the headlight. I know I could probably hook a 9v battery to the motor and determine if it works. However, if I guess wrong and connect it to the headlight I may blow it. I once saw wiring diagrams for some engine/decoders, but am not able to find it. |
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Clark Propst <cepropst@...>
I’d contact BLI. They should be able to supply a drawing for the engine and
even offer advice.
Clark
Propst
Mason City Iowa From: Wil
Davis
Sent: Monday, July 22, 2019 4:01 PM
To: w4dccqa@groups.io
Subject: [w4dccqa] QSI Decoder Wiring Information My
friend has an early BLI PRR M1 that has a QSI decoder. I am unable to read
the decoder, we have tried resetting the decoder with no luck. All it will
do is sit on the track and make idle steam engine sounds. None of the
functions work, headlight, bell etc. Nor does it move. He has asked
me to replace the decoder with a current steam sound decoder. I told him I
would, if I could do it without taking the engine apart. The tender has
the Decoder that appears to be a "motherboard" that it plugs into. It
connects to to the engine with a six wire double ended female connector. I
have determined that the outside wires are track pickup. However, I am
unable to determine what the other four are other than two obviously go to the
motor and two go to the headlight. I have tried everything I can think of
to figure them out without blowing the headlight. I know I could probably
hook a 9v battery to the motor and determine if it works. However, if I
guess wrong and connect it to the headlight I may blow it. I once saw wiring
diagrams for some engine/decoders, but am not able to find it.
Anyone have any idea where i could find this information or know what the middle four wires go to? Thanks, Wil |
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Tom O'Hara
You could also apply 3 volts with a series set of batteries. Not enough to hurt the bulb.
toggle quoted message
Show quoted text
... Tom On Jul 22, 2019, at 4:17 PM, Clark Propst <cepropst@q.com> wrote:
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Al Silverstein
A friend of mine reported the same situation with his BLI, B&O F7B
engine which had a QSI Quantum decoder. Looking through the manual I missed the
comment about the motor going into stand bye.
I noted on another list to which I am a member someone saying they had the
similar problem a while back. The solution noted on this other list was to press
the F6 button twice quickly.
I placed the B&O engine on my test layout, pressed the F6 button twice
quickly, the engine jerked, and the motor would again function as it
should.
A close review of the QSI decoder manual indicated that pressing twice the
F6 button quickly flipped them motor control on and off. If on the motor control
would turn off and if off the motor control would turn back on.
You might want to try the above. If just may cure the problem.
Al Silverstein
From: Wil
Davis
Sent: Monday, July 22, 2019 5:01 PM
To: w4dccqa@groups.io
Subject: [w4dccqa] QSI Decoder Wiring Information My
friend has an early BLI PRR M1 that has a QSI decoder. I am unable to read
the decoder, we have tried resetting the decoder with no luck. All it will
do is sit on the track and make idle steam engine sounds. None of the
functions work, headlight, bell etc. Nor does it move. He has asked
me to replace the decoder with a current steam sound decoder. I told him I
would, if I could do it without taking the engine apart. The tender has
the Decoder that appears to be a "motherboard" that it plugs into. It
connects to to the engine with a six wire double ended female connector. I
have determined that the outside wires are track pickup. However, I am
unable to determine what the other four are other than two obviously go to the
motor and two go to the headlight. I have tried everything I can think of
to figure them out without blowing the headlight. I know I could probably
hook a 9v battery to the motor and determine if it works. However, if I
guess wrong and connect it to the headlight I may blow it. I once saw wiring
diagrams for some engine/decoders, but am not able to find it.
Anyone have any idea where i could find this information or know what the middle four wires go to? Thanks, Wil |
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Wil Davis
Thanks for the suggestions. He has the abbreviated manual that came with the engine, but it offered no help. I will try F6. After I posted my question, being impatient, I decided to try applying power to a couple of the pins to see what happened and found out that in addition to track power being on the outside pins, the next two were motor power as it ran across my workbench. I next connected to the center two and verified that they powered the headlight, just before I got over zealous and burned it out. I was really upset, but found out the if I remove the smoke box front the headlight is on a plug so it's a relatively simple task to replace the bulb. Thanks for the suggestions I will report back if I can revive it with F6. Wil |
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Mitchell Mercante
Wil, The QSI decoder manual for steam locos is online and downloadable. Just Google "QSI decoder manual" and it's among the first entries. Regards, Mitch Mercante
On Tuesday, July 23, 2019, 12:06:14 PM CDT, Wil Davis <wdavis5069@...> wrote:
Thanks for the suggestions. He has the abbreviated manual that came with the engine, but it offered no help. I will try F6. After I posted my question, being impatient, I decided to try applying power to a couple of the pins to see what happened and found out that in addition to track power being on the outside pins, the next two were motor power as it ran across my workbench. I next connected to the center two and verified that they powered the headlight, just before I got over zealous and burned it out. I was really upset, but found out the if I remove the smoke box front the headlight is on a plug so it's a relatively simple task to replace the bulb. Thanks for the suggestions I will report back if I can revive it with F6. Wil |
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Wil Davis
Thanks for the recommendation to try F6. I selected it 4 times and the decoder now works normally. I really appreciate the tip.
Wil |
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On Jul 24, 2019, at 11:02 PM, Wil Davis wrote:
Thanks for the recommendation to try F6. I selected it 4 times and the decoder now works normally. I really appreciate the tip.Wil, There's a way to disable this 'feature' via CVs For steam, change the CVs in order listed below CV49=11 CV50=0 CV53=215 For diesel, change the CVs in order listed below CV49=11 CV50=1 CV53=12 Read back and write down those CVs before changing them in case there's a quirk in your decoder; can never be too safe... Craig Zeni Cary NC |
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