Re: QSI Decoder Wiring Information
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You could also apply 3 volts with a series set of batteries. Not enough to hurt the bulb.
On Jul 22, 2019, at 4:17 PM, Clark Propst <firstname.lastname@example.org
I’d contact BLI. They should be able to supply a drawing for the engine and
even offer advice.
Mason City Iowa
Sent: Monday, July 22, 2019 4:01 PM
Subject: [w4dccqa] QSI Decoder Wiring Information
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?
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