TIU: repair or not

humburg2,

   Because of the many problems you are having I would either send your DCS unit back to MTH for a full up Grade,  or talk to Barry and his crew about helping with the total up grade.

Further it sounds like you are trying to retro-fit your layout.   Once your DCS is in the most current revision, I would go slow testing each part of the layout as I reto-fittered for DCS.  Definitely use the programming track for programming your engines.

Make sure you safe guard your TIU with Scott 10 Amp breakers, if you are using old ZW & KW transformers to power your layout.  Purchase Barry's DCS Companion Vol 2 and the OGR Video guide to DCS both, and us them as you retro-fit your layout.  Get rid of the Atlas HD selector, until after you have fully proven out your DCS/TMCC controlled layout.

PCRR/Dave

Just a thought, did you mean V2 gave 4's on the test track also?

This would indicate a weak channel. That would dictate a repair for me.

If you did not try it on the test track, try swapping V1 with V2 and see if the good signal moves to the other track.  If it moves you have a weak channel and the TIU needs repair.

You might also get a quote from MTH on the repair and consider just buying a new TIU instead, they are available and have better signal generators in them.

PCR:  Layout was/is blocked for conventional. It is a current ZW 2*180w. Retro-fit is what I am trying to do. All measurements were taken with "magic" bulbs. Measurements before and after installing the Selector were the same. 

Russell:  V 2 on the test track fluctuated between 4 and 7, mostly 4s. I swapped V 1 and V 2 out as well as swapping the input channels. The problem stays with TIU's V 2.

The question of repair versus buying another TIU is why I started this thread.  On that I am undecided.

My first DCS system(original version) lasted 7 years. I retired it and purchased a new one.

At $300/7 years, I figured it cost just under $43 per year to own and enjoy.  I figure that I got my moneys worth.

My new one was hooked up within a week, instead of waiting (who knows how long) for repair.