This installation of TCS LL8 Decoder is for HO Scale Walthers Proto 2000 RS27 Limited Edition and was performed by A.G.
The three upper pictures show beautiful, highly detailed Walthers Proto 2000 RS27 with its shell on prior to the LL8 decoder installation.
Remove the right Phillips screw that is circled in red.
Remove the left Phillips screw that is circled in red.
Gently remove the shell. The picture above shows the original light board prior to the LL8 Decoder installation.
Here is a close-up picture of the 8-Pin dummy Plug.
Remove the DCC Dummy plug.
Remove both Phillips screws that hold the original light board and chassis together.
Install our LL8 decoder exactly as shown above.
Because of the fact that this particular locomotive comes with the yellow wire function wired backwards - you need to reverse its polarity. You can do it two ways - cut the LED off and reverse its leads or simply remove the two black plastic wire holders on the DCC plug and reverse the LED polarity. The idea is to get the blue wire connected to the positive part of the diode (the short diode pin) and the yellow wire connected to the negative part of the diode (long diode pin).
Here is a close-up of the finished LL8 decoder installation.
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