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

PCB Layout

• ​SVN Link
• Schematic: ​SCH / ​PDF
• PCB Layout: ​PCB / ​PDF / ​Power (png) / ​Ground (png)
• Parts List: ​XLS

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