This installation of TCS T1P-SH Digital Decoder is for HO Scale Bachmann Spectrum SD45 and was performed by Jim Fuhrman of Garden Grove, CA

Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157

First photo below shows installation in which I wired the T1 harness to an uncommitted 8-pin medium plug. The wire leads attached according to the NMRA standard using the pin numbers silk screened on the PC board.  The T1 fits nicely on top of the leads of the rear LED, and no changes were deemed necessary on the PC board.  However, once I had set about to program and test the installation, I discovered that in this configuration, the unit operated long hood forward. All was not lost, as one of the two units were to operate as a trailing unit anyway, so I wired the second one as shown in the second photo, basically swapping the wires end-for end except for the blue wire.  This configuration of the harness provides for normal short hood forward operation.  I mapped both units to the same address, setting the normal one to have F0 control the head light, F3 to control the headlight of the reverse unit, and F1 to control both rear lights.  In this way I am able to operate them both in a basic consist while independently controlling lights, or operate them individually one at a time if needed. I also tested setting the lsb of CV29 and swapping the values in CVs 33 and 34 on the reverse-wired unit, which works quite well to flip the operation without the need for rewiring.




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

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