PS-1 SD70MAC Won’t come out of neutral

have you replaced the 8.4 you can temporarily install a 9 -volt battery volt battery? then see it it runs, you have possibly have it locked in neutral! you can do a feature reset 18 with a MTH Z4000 transformer!

Jon G TCA 95-41020

Alan

@zhubl posted:

Title says it all, I’m not very versed with with PS1 (20-2154-1) but a club member gave this to me in hopes I could get it to work but it will not budge out of neutral. I’ve attempted to ensure it’s not locked in neutral but I’m not still sure I’ve attached a video with what I can get it to do

I have a PS-1/QSI loco that showed the same symptom. I learned that these early PS engines only need to see about 8-10v on startup. Any higher and they go into reset IIRC.

Go to page 5 of the manual (attached) for my engine.

Bob

Since it started into the options selection sequence, I suspect that Bob's answer could be correct, too high a voltage and you go into the dinks and clanks for options.

What Bob said, also let us know your outcome of this

What Transformer.  CW80 are not liked by PS-1.  Initial voltage below 10 and good battery.  G

I completely forgot about the 10V starting voltage, I did try that with yet again no luck. My go to on the test track is a ZW-L, I know that’s a modified sine wave so I’ve also tried a 1033 with the same results

Zachariah......those early PS1 loco's are very finicky with what transformer they like.

I can only get some of my early PS1 QSI boarded loco's to move out of the "start-up" phase by using my MTH Z1000 transformer.

These same loco's will not, and I repeat, will never come out of "reset/startup" if I use my Z4000 transformer.

See if you can get a hold of an MTH Z1000 transformer, and give it a go, remembering not to exceed 8-10 volts on initial start-up. The lower the voltage (5V) the better, but make sure you have a good, fully charged battery in there!!!

Don't try and get them moving if you have a BCR in there, as you need at least 10V to charge the BCR, and you have to wait for at least 60 seconds for it to charge up....this really stuffs-up the "start-up" program.

Good luck, and as Joe (Transman) said, let us know how you get on.

Peter.......Buco Australia.

@GGG posted:

What Transformer.  CW80 are not liked by PS-1.  Initial voltage below 10 and good battery.  G

Learned this lesson the hard way a while back too. My Z-750 worked just fine.

So after start up, what sound does it make after a direction change.  You can have an ID conflict and it is locked looking for activation.  This requires a reset of the programming with a special chip. 

It could just be locked in neutral.

It could have a harware fault.

Put lighted lock on on test track and use direction button making sure track voltage goes to zero on direction change, and have a new alkaline battery in it for test.  If it goes silent when direction change, then starts up again, you have a battery circuit problem.  Battery, harness, board.  G

Locomotive gives a ding,ding on power up. I have now confirmed the same response with 3 transformers ZW-L,1033, and a Z-1000. Locomotive currently has a BCR installed and as far as I can tell it works correctly sounds stay on with power interruption witch was confirmed with an inconsistent lit caboose.

Try to move through resets by raising voltage high and let it start up, then move voltage down low (not off) and back up.  Should then hear one ding.  Do it again.  two dings.  If you don't get anything on the second cycle, the engine has ID conflict and needs reset.  I can do it.

If it can cycle through resets each cycle more dings, and a clank on fifth time.  It may have a bottom board issue.  Also repairable.  G

I start up with high voltage then when I go low the first time I get a air release then “clink” after that I can raise and lower the voltage all I want but there is no response from the locomotive

Software corrupted and has ID conflict.  Needs to be reprogrammed.  G

Taken a while to get back to this I’ve confirmed that someone did try the PS1 reset chip prior to me getting this locomotive. I take it there much be some other issue in the board?

Zachariah:

There are a number of these special MTH "reset chips", and they all do different things. Most of the reset chips are only available to the MTH tech's, and not the great unwashed, like us.

I would highly recommend you send it to George (GGG), as he is the all-time guru when it comes to PS1 boards.

Peter....Buco Australia.

Thanks Peter, This is not my locomotive just trying to help a club members so I'll see what he wants to do