DFEA Board Status

maintained by Jamieson Olsen
jamieson@fnal.gov

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Property Sticker: 566594
Top DFEA: 31466 0009
Bot DFEA: 31466 0004

Orginally installed in PC03-13 (trigger sectors 62/63)

05 Nov 2005: Pulled from platform.  Spurrious reset.  Observed reset at CTS. 
             Reset monitor (U22) appeared to be pulling the board into reset, 
             likely caused by noisy power.  Install 500uF cap.  Solder press 
             fit connectors.  Replace the reset pullup resistor R10 with 100
             ohm pullup to +3.3V.  Stable at CTS.  

05 Nov 2005: Reinstall in PC03-13.  Resets continue after some time.

12 Nov 2005: Pulled from platform.

14 Nov 2005: Some evidence to suggests that the reset monitor asserts reset 
             when the chip is heated to ~50C or more.  Not conclusive, but 
             removing reset monitor anyway.  All electrolytic caps replaced 
             with 100uF ceramics.  Install 100 ohm pullup resistor to +3.3V 
             on the buffered reset net.  Burn in at CTS, no resets thus far.

             Lift U19 pin 3 (output of reset buffer) and tie high to VCC with 
             100 ohm resistor. Now the only things that could cause the board
             to reset are: U49, the transition board, or the FPGAs.

15 Nov 2005: Installed on platform by SG and MB.  The buffered reset 
             immediately went to 0.5V and was fixed by replacing the transition
             board (which had a bad buffer input 74LCX16244).  It appears now
             that this board was working correctly and the spurrious reset
	     problems were caused by the transition board input.

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Property Sticker: 566552
Top DFEA: 10
Bot DFEA: ?

14 Nov 2005: DFEA spare board built up with VIRTEX-E parts.  WARNING: these
             boards are not bitstream compatible with the DFEAs.  F1 replaced 
             with 10A picofuse.  Solder pressfit connectors.  Solder vias on 
             the reset traces. Bottom DFEAe does not program via JTAG, though.

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Property Sticker: 566451
Top DFEA: ?
Bot DFEA: ?

14 Nov 2005: DFEA spare board built up with VIRTEX-E parts.  WARNING: these
             boards are not bitstream compatible with the DFEAs.

             Init ok from JTAG.  Input link test OK.  Interconnect link 
             test OK.  Output link test OK.

15 Nov 2005: Does not init from backplane... needs more work.

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Serial Number: WKH06-001 (pre-production motherboard)
Top DFEA: 100 
Bot DFEA: 101 (both are pre-production)

22 May 2002: pulled from platform, top DFEA init problems, 
             tick and turn does not increment

15 Nov 2005: fuse mod, clean the board.

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Serial Number: WKH06-005 (pre-production motherboard)
Top DFEA: 104 
Bot DFEA: 105 (both are pre-production)

28 Mar 2003: pulled from platform; bot DFEA init problems, tick and turn
             does not increment.

15 Nov 2005: fuse mod, clean the board.

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Property Sticker: 566544
Top DFEA: 31466 0011
Bot DFEA: 31466 0022

18 May 2005: Pulled from platform.  Resetting sporatically TS48/49.

07 Jul 2005: Replace PTC device with 10A fuse.  Going back in for TS78/79.

26 Jul 2005: Pulled from platform.. still resetting.

27 Jul 2005: replace more electrolytic caps, solder pressfits, link test ok, 
             the board is not resetting at the test stand.

12 Nov 2005: installed on platform in PC03-3-13.  Sporadic resets.
             Pulled from the platform, lift U22 pin 6 (buffered reset) and 
             reinstall.  Still restting.

15 Nov 2005: Pulled from platform.  Problem turned out to be a bad 
             transition board in PC03-3-13.  This board is probably OK, but
             it will need to go through more testing.  Resolder U22.6.

20 Jan 2006: Installed in PC03-3-7 TS50/51.  Working fine.

 9 Feb 2006: Causing major problems with the backplane status, DFEC
             generates DTACK errors whenever it tries to communicate
             with this board.  Really screwed up.  Needs to be pulled.

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Property Sticker: 566591
Top DFEA: 31466 0064
Bot DFEA: 31466 0039           

20 Jan 2006: Pulled from the platform.  TS50 (upper daughterboard)
             medium pt chip appears to be losing init.  Symptoms are
             garbled doublet count and missing medium pt tracks.  The
             counts don't go to zero so something is still going on
             with that chip.  Hard reset does not help.  Reinit brings
             it back to normal.

9 Feb 2006: Fuse and cap mod, hopefully that will cleanup the power
            enough to keep the Medium PT chip from getting into this
            strange state.  Burning in now.  Ready for installation
            tomorrow morning.