Pendolino

[Chrissaf]

Have a pendalino works fine on  normal 12 volt controller with blank in place trying to get it dcc operational  but it's dead if I revert back to normal 12 volt great runs fine tried replacing pcb that's not worked noticed connections to pcb are dry connected using small plastic clips do not appear great but do not want to solder with heat getting into pcb any clues 

[Rog RJ]

What DCC controller and decoders are you using?

[wagonmaster]

controller is hornby select and sound card to try out is hornby class 43 they come in pairs and it works ok in dummy car but not power car

[2e0dtoeric]

Swap the two decoders over. Does the fault change ends?

Yes - duff decoder.

No, fault is in that car.

Perhaps you have pulled a wire off, somewhere, or dislodged the wheel pickups while you were fiddling.

[wagonmaster]

tried that and both decoders work but not in powert car and select has latest update from hornby

[2e0dtoeric]

Then the fault is in the power car.

There are loads of posts in here, and other places, on how to track down a fault, using a PP3 battery and a bit of thought.

Unplug the decoder first!

[jane1707819582]

tried that and both decoders work but not in powert car and select has latest update from hornby

You may have a faulty motor.Try the decoder on a known working loco.

 

[96RAF]

There is obviously a fault with that power car. Lift the board with the socket on it and look closely with a magnifier for stray solder tracking or a break in the pcb tracks, etc. Having a multi-meter would probably help with fault finding. Often such a fault as solder tracking is of no problem on DC but manifests once a decoder is put into circuit.

 

Despite those seemingly poor wire clips I have found they are reliable once fitted correctly over the wires. Never had one fall off.

 

[wagonmaster]

nothing stands out on pcb but bear in mind this pcb was supplied by hornby this week to replace what i thought was a faulty pcb board will keep looking and checking all conection

[96RAF]

Take a look at Service Sheets 300 (7-pin decoder fitted) and 302 (DCC Ready with blank fitted). You will see the (all black) wires coming from the motor and the motor bogie pickups. Also the pickup wires from the dummy bogie.

 

I would like to bet the motor and motor bogie pickup wires are transposed on one side or the other and hence cross connected at the main PCB. This means it will run on DC as the blanking plate just connects the pickup on each side to the motor, but not when you put a decoder in circuit as we need the pickups to feed the decoder and the decoder to feed the motor.

 

Use a multi-meter to check which wire is from the motor and which is from the bogie and make sure they are connected to the main PCB correctly. In addition check that the front bogie pickup wires are connected side to side the same as the motor bogie.

[wagonmaster]

Thanks will look into it tried decoder in friends alstom penalino it worked fine is there any difference in the normal pendalino and the alstom or is it just the paint job

[96RAF]

Some Pendos had different number of decoder pins depending upon DCC Ready or DCC Fitted. See service sheets already referenced.