DCS Troubleshooting Guide

DCS Troubleshooting Guide
STEP I – Establish communication between the remote and the TIU
A. Power up both the DCS Remote and the TIU by turning on a
transformer hooked to the fixed input 1 channel and pressing the S5
On/Off button on the remote.
B. Press the READ button on the remote.
1. If the remote says FOUND TIU ADDRESS _# WITH _# of AIU
BOXES CONNECTED that means that your remote is
communicating with the TIU – Proceed to STEP II.
2. If the remote says TIU ADDRESS # NOT FOUND that means that
your remote is not communicating with the TIU – keep following this
step.
a. Power up the TIU and count the number of times the red LED
blinks, this number is the actual address of the TIU. Compare
that number to the TIU address that the remote did not find.
1. If the numbers do not match then you must add the correct
TIU address in to the remote and delete any unused TIU
addresses that may be in the remote already. After you’re
finished, power up the TIU and the remote and press the
READ button again.
• If the remote finds the TIU then proceed to STEP II.
2. If the numbers match but the remote still will not find the TIU
that means you most likely have a loose RF Module in either
the remote or the TIU. Open up both and make sure that the
RF Modules are pushed all the way in to their respective
sockets. After you finished power up the TIU and remote
and press the READ button again.
a. If the remote finds the TIU proceed to STEP II.
b. If the remote still does not find the TIU that means there
is problem with the RF communication between the
Remote and the TIU. If available use a known good DCS
system to determine which item (Remote or TIU) is not
working properly. Contact an Authorized Service Center
or MTH for service.
3. If the red LED does not light at all then check for a blown
fuse in the TIU.
4. If the red LED in the TIU comes on but does not blink at all
that usually means that the software was not loaded
correctly in the TIU, try re-loading the software.
STEP II – Establish communication between the TIU and a PS2 Engine
A. Place one PS2 equipped engine on a track hooked to the Fixed 1
output of the TIU. Remove all other engines and cars from the track.
B. Power up the transformer that is hooked to the Fixed input 1 of the
TIU. Note, do not use the output from a Z750/Z500/Z1000 controller,
remove the controller and run the output from the brick to the TIU
input. If the transformer circuit breaker trips or you see high current
draw on the Z4000, check for a short on the track. If no short is found
on the track, return TIU to MTH for service.
C. Press the READ button.
• If the remote does not find the TIU go back to STEP I
D. Try to add the PS2 engine in to the remote by pressing the MENU
button, then selecting System, then Engine Setup, Add Engine, Add
MTH Engine.
1. If the engine adds in to the remote that means that the Fixed 1
channel seems to be working properly – do a track signal test to
make sure.
2. If the engine does not add in to the remote:
a. Make sure that the engine is not already in the remotes engine
list.
• If the engine is already in the remote then select the
engine from the list and start it up – if the engine starts up
that means that channel on the TIU seems to be working ok
– do a track signal test to make sure. Consult the DCS
User’s Manual, Menu Operations – System, Track Signal for
instructions on the track signal test.
b. Make sure there is in fact power on the track by placing a
lighted car on the track by the engine or checking a lighted lockon that is connected to that particular track.
• If there is no power to the track then check the wiring from
the output of the TIU to the track. If that looks ok then you
may open the TIU and check for either a blown fuse in the
TIU or a loose wire connecting the PCB to one of the
input/output terminals.
c. Make sure that the DCS signal is turned on to that track by
pressing the Menu button, then selecting System, then DCS
Setup, then press the S3 soft key it will say AON above it on the
LCD. Try to add the engine again.
• If the engine adds in to the remote that means that channel
is now working properly – do a track signal test to verify
signal quality.
d. Rule out the layout/wiring as being the problem. You can do
that by hooking up just a test track to the output of the channel
and placing one PS2 equipped engine on it. Power everything
back up and try to add the engine again.
1. If the engine adds on the test track that means the problem
most likely lies in the layout/wiring. Do a track signal test
while the engine is on the test track – you should have no
less than a 10.
2. If the engine does not add on the test track or you have a
poor track signal strength add one 18 Volt light bulb to the
TIU output terminals or the terminal block and try again.
• If the engine adds on the test track, do a track signal test
while the engine is on the test track – you should have no
less than a 10.
3. If the engine does not add or the signal strength does not
improve, try another engine equipped with PS2.
• If the engine adds on the test track, do a track signal test
while the engine is on the test track – if you have no less
than a 10 the problem is with the previous engine equipped
with PS2. Try reversing the polarity of the wires to the
track/engine and try again. If the engine is found, reverse
the polarity of the wires in the engine via a polarity switch (if
the model is so equipped). Or check the wiring inside the
engine to make sure the TIU + output reaches pin 6 or 7 of
the 7 pin connector at the PS2 board. Remember PS2
engines are polarity sensitive and the DCS signal is sent via
the TIU + output (ie. Center rail for 3 rail engines).
4. If the second PS2 equipped engine does not add or the
signal strength does not improve, the problem is most likely
in the TIU. Return the TIU to MTH for service.
E. Test all other channels on the TIU to be sure they can communicate
with a PS2 engine. Be sure to power up either Fixed 1 or AUX power
when using Fixed 2, VAR 1, or VAR 2. If you can not get any voltage
out of one or both of the variable channels then proceed to STEP III.
STEP III – Ensure that the Variable voltage channels are working correctly
A. Hook up a track to the output of VAR 1 making sure you have either a
lighted lock-on or a lit passenger car on the track.
B. Power up the TIU using either Fixed input 1 or AUX power.
C. Connect a MTH recommended transformer to the input side of VAR 1
and raise the throttle to MAX.
D. Using the DCS remote press the TR button and make sure there are
variable tracks added in to the remote. They should come up as TIU #
VAR 1 and TIU # VAR 2.
• If no tracks come up in the remote or the tracks that do come up
are named something different and you don’t know which TIU and
VAR channel they may be linked to then you must *add the correct
tracks in to the remote. (ie. if when you press the TR button the
tracks come up with names of top and bottom and your not sure if
top is VAR 1 or VAR 2). *Consult the DCS User’s Manual, Menu
Operations – System, Track Setup for detailed instructions.
E. Select TIU # VAR 1 from the list – you should now have a screen that
says VOLTS: 0.0. Using the thumb wheel scroll the voltage up to 10V
– check to see if there is in fact voltage on the track by looking at the
lighted lock-on or the lit passenger car on the track.
• If there is voltage on the track try scrolling the voltage up and
down a couple times making sure the light in the lock-on/passenger
car gets dimmer and brighter. If it does that means everything
seems to be working ok on VAR 1 – proceed to checking the VAR 2
channel.
F. Make sure the tracks added in to the track menu are for the correct TIU
(ie. if your TIU is on address 3 and the tracks come up TIU 1 VAR 1
and TIU 1 VAR 2 they will not work).
• If the tracks are pointing to an incorrect TIU address delete them
and add in the correct tracks.
G. Open the TIU and check for a blown fuse and/or a loose wire
connecting the PCB to the input/output terminals.
1. If there is in fact a blown fuse or a loose wire then correct the
problem and try again.
2. If there are no fuses or the fuses are ok and the wires connecting
the PCB to the input/output terminals are all intact then the problem
is most likely in the TIU. Return TIU to MTH for service.
H. If none of the above measures correct the problem return the DCS
system to MTH for service.
STEP IV – Operating Issues while running a Lash-up
A. Whenever an operating problem occurs when running a lash-up,
check the TIU and Remote code revisions. The code revision in the
TIU and Remote must match. Power up the remote by pressing the
S5 On/Off button on the remote. Record the Remote code Version
### displayed in the LCD screen as the remote powers up.
B. Power up the TIU by turning on a transformer hooked to the fixed input
1 channel or AUX power. Using the Remote, select Menu, System,
TIU Set-up, TIU Version to display the TIU code revision. Compare the
Remote and TIU code versions, they must match. If they do not or
there is a later version, go to MTH’s website and download new code.
See DCS Dealer Loader instructions on the PS2 section of the MTH’s
Website by selecting the PS2 icon on the lower section of the
homepage.