I am no expert on DCC and just if anyone could give me some advice on this it would be appreciated. I got a few of the Hattons Originals DCR-21Pin-Direct-Neo 21-pin 6-function decoders and have tried fitting to a MM 201, marker lights red/white and directional with F0 and the headlights on F1 and F2 ok but can't get cab lights working Next I tried fitting another Hattons 6 function chip to a MM 071 and same result as above and no cab lights. Furthermore, I fitted one to an A Class IRM and can only get marker lights red/white and directional with F0 to work, no other function works. I also tried a Class 121 and the same marker lights red/white work but no other function working. At this stage I got a MM0004 chip and tested it to make sure the locos/pcb wasn't faulty and all functions worked on each model ok bar the cab lights on the A Class. Any thoughts or advice on this from anyone would be very helpful or do we have to buy M.M./IRM chips to get all functions working on these locos. It would cost me €1500 to do all my locos.
To try to answer gfh 2000 I have successfully fitted my 141/181 locos with a 4 function decoder the cv are as follows I hope this helps in someway CV33=1 CV34=1 CV35=1 CV36=2 CV49=0 CV50=16 CV51=16 CV52=0