DCS remote update, how many times:

I have 2 TIU with remotes.  One, mine has 'DCS' splash on top.  The Other, the clubs, has 'Proto 2 Sound'.  after practicing following the process thru and finally getting it right on my equipment wen on to the clubs.  Struggled again getting system to find the com port.  Got that for the TIU and flashed the 6.1 into it.  Then tried to update the remote.  Back to Com port not found.  Observed that on power up the TIU led flashes 15 times.  Could stop the led flashing by power up with audio cable in place.  Finally The remote reports 6.1, BUT shows'INACTIVE ENGINE' AT THE TOP' AND 'INA S/U ALL' at bottom.  changed remote to addr 15.  remote continues to try to find TIU at 1.

Any suggestions?

Anyone know difference between The 2 differently labeled TIU's? What is latest TIU hardware?

Look on the bottom of the TIU, there is a version label on all but the original Rev. G units.  No label, Rev. G  Only the Rev. L has the USB port.

Look underneath TIU.  If it is Rev G, it will not have a sticker.  All subsequent versions had a sticker.  All TIUs, whatever version, will run 6.1.

Unchange remote address, back to 1.  That is not relevant to this exercise.

Something is wrong if a TIU flashes 15 times.  That's the first issue to cure. 

A TIU that flashes more than 5 times is defective.

To add to Barry's comment, it's usually not possible to repair those either, none of the easily removed parts are involved in that failure.

OK, That is the one that the Club owns.  They had given up on it.  It does have a label 'FCC ID OT8RFMT'.  I am assuming that is the FCC license that was likely issued after production started.   

My unit clearly states Rev13.   What does that tell me relative to being the latest hardware.  I guessing the Rev L with the USB port is the most up to date then.   If we have to replace the club's TIU, I want to ensure we have the latest Rev.

I downloaded the book but haven't searched it for what the number of LED flashes means on startup.  I gather that 15 is catastrophic.  Will come back to that unit later.  

Thank you for you help.

I believe Rev I3 is the latest one prior to the Rev L production.  Rev L has been in production for a few years now.

More than five flashes indicates an internal processor or memory failure, and AFAIK, it's an unrepairable failure.  Many of the failures are able to be repaired, individual channels, DCS signals, etc.

Not unrepairable just difficult.  Risk to damaging traces on a very closely spaced multi leg chip.  G

George, I'd say very....very... difficult without an IR rework capability.  The chips with pins on all sides at such close spacing are pretty close to impossible to do with a soldering iron.

The number of flashes is the number that the user has assigned to that particular TIU.  Must be from 1 to 5.  New TIUs come set to 1.  This has nothing to do with the number you assign to a remote.  Each TIU on the layout should have a different number; doesn't matter with the remote.  All my remotes are set to #1.

for GGG

Yes, I understand.  Interested in what chip.  Opened unit and re-seated RF module.  Some improvement in connectivity, but still led flashing > 5.   I have 20 years working with Telcom and instruments with SMT boards.  I can't personally rework, but may be able to get it done.  HOWEVER suspect it will be better to have it repaired or replaced.  I am retired and would need to go to old contacts.

I am just always interested in this aspect.  My experience back with trains in from Nov 2017.  Most people in the area club are afraid of the modern trains.  I am certainly a neophyte, but love to learn.

Won't focus on this, but will likely come back to it now and again.  

Thank you guys for the help.  I now happily have 3 MTH engines running, a conventional post war, and and 4 legacy.  

Have and am reading Barry's book.