14
the problem input. If that assembly works then inspect the
problem sensor assembly for damage. Check to see if the
leads on the optics have been bent such that they are shorting
out (most likely caused while pushing the sensors up through
the roadbed). Inspect the cable itself for damage as well. If
you cannot get the sensor assembly working contact TCS Inc.
for technical assistance.
If you do not get any display on the unit when you power it
up, make sure that the intended voltage is present on the
TrainSpeed 4’s power terminals. If this voltage reads OK then
try disconnecting all sensor cables and powering the unit up.
If you get a display (you should see the ‘oP.x’ followed by
‘Sn.E’) then one of the sensor cables has been damaged. Plug
them in one at a time until you isolate the problem cable.
Inspect this cable for damage and contact TCS Inc. for a
replacement if necessary.
Appendix
Extension cables
Extension cables can be made from normal male and female
ten pin ribbon cable connectors and cable. An extension can
be purchased from TCS Inc. or you can buy the parts from
Digikey (
. Please note that Digikey has a
$25.00 minimum order (or else they will charge you an extra
$5.00). The necessary parts are:
Qty
P/N
Desc.
1
MPK10K-ND
10 pin plug connector
1
MSD10K-ND
10 pin socket connector
1
AE10G-X-ND*
ribbon cable
* The ‘X’ in the cable part number is 5, 10 or 25, which is
how long the cable is in feet.
The cable is best assembled using a vise to crimp the
connectors on the cable. Be sure to align the red stripe on the