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

== PCB Layout ==

* [http://edf.bu.edu/svn/edf/G-2/NewElectronics/TestFixtures/ASDQ_TDC_Tester/ SVN Link]
* Schematic: [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/tester.sch SCH] / [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/tester_sch.pdf PDF]
* PCB Layout: [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/tester.pcb PCB] / [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/tester_top.pdf PDF] / [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/tester_pwr.png Power (png)] / [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/tester_gnd.png Ground (png)]
* Parts List:  [http://ohm.bu.edu/~hazen/G-2/ASDQ_TDC_Tester/TesterBOM.xls 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