This installation of TCS M1P-SH Decoder is for HO Scale Atlas MP15 and was performed by a TCS Customer.
This loco was released by Atlas in December 2005. The TCS M1P-SH decoder fits plug 'n play style for this locomotive! This decoder is the TCS M1 with a harness 1 3/4" long. The wires are arranged coming off the NMRA plug to the left. Notice the M1 decoder rests against the locomotive frame just behind the front truck. The wires coming off the decoder are formed to route them between the connectors on the Atlas light board. They must also be formed as shown to allow clearance for the loco shell to be reinstalled.
1. To install the M1P-SH decoder remove the locomotive shell by removing the couplers from there coupler pockets.
2. Remove the shell by lifting it straight off.
3. Remove the shorting plug in the NMRA socket on the locomotive light board.
4. Install the M1P-15 decoder as shown. Bend the wires away from the decoder at a right angle and route them between the connectors on the Atlas light board. Plug the connector into the NMRA socket with the orange lead at pin one position in the socket. Pin one is marked on the loco lighting board. A dab of RTV can be used if wanted to hold the decoder in place.
5. Reinstall the shell and couplers and it is finished.
Important Soldering Tip
Please do not use any flux either liquid or paste on the mother board. Over time, the acidic properties of liquid or paste flux will begin eating away at the fiberglass PCB and will damage it. Use only Rosin-core solder or no-clean flux approved for electronics use.
TCS recommends the use of Kester "44" Sn63 Pb37, .015" diameter Rosin-core solder. Kester part number 24-6337-0007.
You can order this solder from the following retailers:
Digikey - PN:KE1110-ND
Techni-Tool - PN:488SO6775
Other solder tips
When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder, the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire