The installation is for HO-Scale Broadway Limited Blue Line EMD SD7. It uses TCS DP2X or T1P-SH or MC2P-SH decoder and was performed by a TCS Customer.
There are several good options for installing a TCS decoder in this Blue Line EMD SD7 locomotive. The DP2X is the most simple and straight forward, it plugs directly into the 8 pin NMRA socket supplied with the locomotive. The TCS extension plug must be used with the DP2X decoder for this installation. The extension plug is sold separately from the decoder. If your dealer does not have an extension plug in stock call TCS directly and we will mail one to you right away. The T1 decoder with a short length harness, the MC2 decoder with a short length harness, or a M1 decoder with a short length harness will also work just fine. Below are pictures of some of the options.
DP2X with extension socket. (DP2X stands for "Direct Plug-two function- X series lighting effects").
TCS T1 decoder with short length harness. A T1 decoder ordered together with a medium harness is part number T1P-SH.
TCS MC2 with a short length harness, part number MC2P-SH.
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