wiki:ASDQ_TDC_Tester

This page documents a test fixture for the new ASDQ boards.

PCB Layout

Suggestions for initial assembly / test:

  • Install J1 and J2 and carefully check for opens and shorts.
  • Install all parts on page 2 of the schematic (Power connectors, voltage regulators, etc)
  • Apply +4V with current limit, and check that +3V, +1.6V, +1.4V are all present
  • Apply -4V with current limit, and check that -1.6V and -3V are present
  • Install all parts on page 3
  • Power up and check that voltages on both ends of R11 and R16 are about -0.4V +/- 0.2V.

ECO list 12-8-14:

  • -1.6V Reg was outputting -2.9V, wrong feedback network
    • R19 to 68K
    • R20 to 24K
Last modified 8 years ago Last modified on Dec 8, 2014, 3:18:14 PM