Makum Posted September 15, 2015 Share Posted September 15, 2015 Can anyone advise how to revert back from the three wire decoders to make my units DC again? An idiots guide would be appreciated. Link to comment Share on other sites More sharing options...
poliss Posted September 15, 2015 Share Posted September 15, 2015 Can't think of any guides. All I can suggest is that you reverse the process used for fitting them as shown here. Link Link to comment Share on other sites More sharing options...
ModelerXYZ Posted September 15, 2015 Share Posted September 15, 2015 what do you mean by 3 wire decoders? If you mean accessory decoders for point motors, pull them off, connect to a connecter block and run wires to the switch.locos: connect left pickup to motor left, right pickup to other side of the motor.XYZ Link to comment Share on other sites More sharing options...
poliss Posted September 15, 2015 Share Posted September 15, 2015 The loco decoders on the Hornby Zero 1 system had 3 wires XYZ. Link to comment Share on other sites More sharing options...
Makum Posted September 16, 2015 Author Share Posted September 16, 2015 Thanks Poliss and XYZ. I'm holding on for someone to give me an idiots guide. I fitted them years ago but I'm fearful of damaging a motor if I get it wrong. Link to comment Share on other sites More sharing options...
Michael_A Posted September 16, 2015 Share Posted September 16, 2015 It is highly unliely you will damage a motor. It will either simply not work, or you will create a short! There are only two connections on a motor: one goes to wheels that pick up from one rail of the track, the other to the opposite side. Link to comment Share on other sites More sharing options...
dynax Posted September 16, 2015 Share Posted September 16, 2015 unsolder all the wires from motor and pickups, check with a multimeter that there is no continuity between the motor and the chassis, if all ok, rewire left rail pickup to motor left, and right rail pickup to motor right, put on track and test, Link to comment Share on other sites More sharing options...
Fishmanoz Posted September 16, 2015 Share Posted September 16, 2015 And if there is continuity still between one side of the motor and chassis, then you don't need to worry about wiring that. There will almost certainly then be a connection from the unisulated wheels to the motor. You only need to wire the other. But it really is that simple. Pickups from wheels on one rail to one motor connection, and from the the other rail to the other connection, plus one of those little capacitors across the motor connections to suppress interference. And almost zero chance of a catastrophe if you get it wrong. Either you'll have failed to make all the connections needed and nothing will happen, or you'll have created a short causing your controller overload protection to operate and no damage to anything. Link to comment Share on other sites More sharing options...
Makum Posted September 28, 2015 Author Share Posted September 28, 2015 Many thanks for the clear and reasuring advice folks. I shall now progress. Link to comment Share on other sites More sharing options...
Makum Posted September 28, 2015 Author Share Posted September 28, 2015 Many thanks for the clear and reasuring advice folks. I shall now progress. Link to comment Share on other sites More sharing options...
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