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    User name YANG

    Log entry time 16:37:08 on August 11, 2014

    Entry number 400145

    This entry is a followup to: 400022

    keyword=RHRS FPP problem

    1, The negative low voltage changes to -3.646V on U_plane M5 module, which was -4.885V measured last week.

    2, We replaced the cable connector for U4_M11(bottom plane) connector, but the signals are still missing.

    3, I switched two ribbon cables on the TDC, and the channels for U4_M11(bottom plane) were then connected with U5_M9(middle plane), the signals were still missing. I believe slot 18 TDC channel 94 and 95 are bad. And that is the reason that U4_M11 signals are always missing.



    A copy of this log entry has been emailed to: bogdanw,yangw,shahinya,mongi