This installation of TCS T4X Decoder is for HO Scale Lima BB9200 series and was performed by Robert Lewis of Tilehust, Reading, United Kingdom.
This is a Lima model of a French SNCF BB9200 series electric locomotive, as used on the Le Capitole express train. The pantographs are non-working.
To remove the body unscrew the cross head screw in the centre of the roof. the body will then lift off.
Remove all the existing wiring and the diodes for the directional lighting. the pick-ups are from one side on the motor bogie and from the other, via the central retaining pin for the other. The bare copper wire seen clearly in this picture is the right hand pick-up on the motor bogie, this wire needs to be de-soldered and bent away from the motor contact.
The green and purple wires have not been used (yet), so they have been sleeved and coiled out of the way. An additional wire (green) has been spliced into the blue to provide a feed for the 2nd headlight bulb. Solder the blue and yellow wire to the headlamp contacts at the motor end, the placement of an in-line resistor will reduce the brightness of the bulb, see the table on the TCS instruction sheet. The white and extra blue (green) should be soldered to the headlight at the opposite end. The Red decoder wire has been soldered to the bare copper pickup wire on the motor bogie, make sure to sleeve the bare wire. Solder the black to the solder tag on the un-powered bogie pivot pin. Solder the grey and orange wires to the motor terminals. The wiring at the motor end has been passed through the loop made by the gear retaining strip and the motor body to make it neat, and also under the loop of the weight retaining plug in the center of the locomotive. The decoder can be stuck down with double-sided tape between the weight and the bogie pivot. Test installation and then re-fit the body.
I have fitted red LED tail lights. The LED's are positioned next to the existing headlight bulbs, as there is a clear plastic "lightguide" inside the body it seems to work quite well. One LED lead is soldered to the contact with the blue wire, and the other run to the other end using some of the removed black wire from the locomotive to connect with the white or yellow as appropriate. A have used a 300ohm resistor in series with each LED.
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