Hello,

I have a YD7001 and a DR5033. It would appear that the polarity of the track power is backwards. If I run a train really slowly across the gap, the track power flickers real quick and then works fine. I suspect this is the polarity switching.? But if I run the trains too quickly across the double gap, the system throws a short.

Is there any way to disable the auto switching of polarity and just fixing the track output on the DR5033 to match the polarity output of the YD7001?

My other option is the flip the wires coming out of the booster, which would theoretically set the polarity to match, and eliminate the one time polarity switch when I turn on track power.

Thoughts?

(Yes, I looked in the manual, but I did not see any CV settings for this)
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Hi Heath

We had a similar problem at York Railway Modellers 4 years ago, but ours involved 2 DR5033s. We had auto reversing disabled on the DR5033s.- we didn't want them to react before our auto reverses for the loops and turntables did.? When a loco traversed the gap between the the power districts controlled by each of the DR5033s, it would stutter eventually causing one of the DR5033s to show a short. When the short reset, the loco would stutter again and move a little bit.

As we dug into the problem we found that one of our 7 DR5033s track outputs had reverse 'polarity' compared to the other 6.? The solution was to reverse the wires to the power bus on that one DR5033.? That one DR5033 has a label affixed to it saying that the polarity of the track outputs are reversed versus the other DR5033s, just incase anyone ever disconnects the track wires.

Hopefully this will help.? Jay Lennox - Toronto

Heath,
Page 7 of the DR5033 manual shows that you turn off LNCV bit 6 labelled "Automatic polarity reversal off". It comes on by default. No insult, but how did you miss this? :) I've noticed that I tend to not find things when I search in hope. When I search knowing it's there I often succeed. I must be getting too old for this.
And I can also confirm what Jay Lennox has said about keeping all your DR5033's track outputs wired so that they never want to reverse the polarity. Turning off bit 6 will force you to have it wired properly.

I am looking at the manual that is uploaded to the files section of this group and it only has 5 pages. Where can I get the manual with the additional pages?

This is the version I downloaded from here.

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