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Good evening Members.  I have been wiring my new layout all day and finally got to the test point and found problems with the TIU.  I have two Z4000 transformers running into the TIU. Four lines each from the variable posts.  The Tiu has full power on the input side but only the two fixed channels are showing  power on the output side.  I did a TIU reset and no change.  I should note I bought the TIU used about a year ago and it's the REV L version.  I did take the cover off and found one blown fuse. which I replaced.   Any thoughts on what I should check next?  

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Tim,

You need to do one of two things to get the variable channels to pass power:

  • Set them to fixed mode of operation so that whatever goes in, goes out:

Menu/System/DCS Setup, scroll to Variable 1 and press FXD until "Channel in Fixed mode" is displayed.

Repeat for Variable 2.

  • Setup TIU Tracks for the variable channels to allow DCS Remote control of the voltage. The is described in The DCS Companion 3rd Edition on page 130, as follows:

Creating TIU Tracks on Variable Channels

TIU Tracks are created to allow the DCS operator to vary the voltage to the tracks through the TIU's Variable Channels. TIU Tracks are created as follows:

• Press the Menu key to enter the DCS menus.

• Scroll the thumbwheel to SYSTEM and press the thumbwheel to select it.

• Scroll the thumbwheel to TRACK SETUP and press the thumbwheel to select it.

• Scroll to ADD TRACK and press the thumbwheel to select it.

• Scroll to ADD TIU TRACK and press the thumbwheel to select it.

• A list of available TIUs is displayed. Use the thumbwheel to scroll to the TIU for which a TIU Track is to be created and press the thumbwheel to select it.

• Use the thumbwheel to scroll to the Variable Channel for which the TIU Track is to be created, either Variable 1 or Variable 2, and press the thumbwheel to select it.

• Use the on-screen keyboard to enter the name of the TIU Track for that Variable Channel. Scroll the thumbwheel to each character in the name and press the thumbwheel to add the character. Press < to delete a character entered in error. Scroll to D on the bottom row, right end of the keyboard to save the track's name and be returned to the TRACK SETUP menu.

DCS Book CoverThis and a whole lot more is all in “The DCS Companion 3rd Edition!"

This book is available from many fine OGR advertisers and forum sponsors, or as an eBook or a printed book at OGR’s web store!

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