Hub SN-19 Trailer Sheet

02 JAN 20
	- Begin work on Hub SN19 per instructions at /hub/hardware/details/Hub_Inventory_Status_Final_Assembly/hub_msu_final_assembly_prod_only_print.txt
		- Check GND/ESD continuity
		- Verify power supply resistances to GND
		- Preliminary mechanical work - mounting blocks, removing runners, etc.
		- Begin component R&R.

10 JAN 20
	- Completed final assembly of Hub SN19
	- Work conformed to given instructions.
		- Installed discrete power wires.
		- Installed LRC filter components on MGT_AVCC, MGT_AVTT, and Fan 1V8 supplies.
		- Installed minipods.
		- Installed FPGA heat sink.
		- Installed MPOs.
		- Installed fiber ribbons and clipped to side of heat sink.
		- Powered on and configured DC/DC converters.
		- Programmed with safe/foundation firmware.
		- Verified 25MHz, 40MHz, and 320MHz clocks with oscilloscope.
		- Final voltage measurements as follows:
		
	NOTE: Connector J3 had several bad solder joints, causing faulty voltage readings
	      during the final power-on tests. The worst was Pin 2, which wasn't soldered
	      at all, therefore not making contact with its pad, and making a reading of
	      FPGA Core voltage (0.953V) impossible until that was corrected. 
	      'Before' picture placed in SN19 folder. It's not the best picture, but it's
	      the best picture my phone can take. You can still make out that the pin all
	      the way to the right (J3P2) is not even making contact with the solder blob 
	      on the pad underneath it. Truthfully, that connector should be R&R for the
	      highest level of quality, but it is entirely usable in its current, 
	      "touched-up" state.



	  
     Power Bus:             FPGA     MGT     MGT    Swch    Bulk     Fan    Bulk
                            Core    AVCC    AVTT     1V2     1V8     1V8     3V3
                            ----    ----    ----    ----    ----    ----    ----
       Address:              40      41      42      43      44      45      46
         Volts:            0.92     1.00    1.19   1.19    1.79    1.81     3.309
          Amps:            0.88     0.00    0.00   1.75    0.56   11.62     2.062
   Fluke Volts:            0.953    1.000   1.199  1.199   1.790   1.797    3.312
   
	- Unit has been placed in the storage cabinet to wait for its turn in the 14SS.
	
23 JAN 2020
	- Removed previously installed IPMC bypass from the handle switch. Installed 0 Ohm
	  jumper at ocation JMP5, direct enabling IPMC control of ISO_12V.
	  
06 AUG 2020
- This note is to confirm that this Hub has been cleaned with G3 flux remover.
  See
  l1calo/hub/hardware/details/Hub_Inventory_Status_Final_Assembly/FluxProblemOnHubs.txt 
  for details.
  
21 SEP 2020
- This note is to comfirm that this Hub has been through the component replacement
  process as described at the bottom of the file at the above link.

28 JUN 2021
- This is a note to confirm that the board has been through the fiber ribbon replacement. See hub/hardware/details/Hub_Inventory_Status_Final_Assembly/Fiber%20Ribbon%20Problem/00_Hub_Fiber_Ribbon_Issue.txt for details.