Hub SN-26 Trailer Sheet

31 MAR 2020
	- Begin work on Hub SN26 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.

09 APR 2020
	- Completed final assembly of Hub SN26:
		- Work conformed to given instructions.
		- Installed RC filter components on MGT_AVCC, MGT_AVTT, and Fan_1V8 supplies.
		- Installed discrete power wires.
		- Installed light pipes and front panel.
		- Installed IPMC module #137
		- Powered on and configured DC/DC converters.
		- Programmed with safe/foundation firmware.
		- Installed minipods.
		- Installed MPOs.
		- Installed FPGA heat sink.
		- Installed fiber ribbons and clipped to side of heat sink.
		- Verified 25MHz, 40MHz, and 320MHz clocks with oscilloscope:
			
			Clock	Free Run  Hi-Lock  Lo-Lock
			------	--------  -------  -------
			40MHz	 40.065	  40.0831  40.0744
		       320MHz	316.4	  40.0821  40.0756
			25Mhz    25.00
		  Spare 40Mhz    40.032

		- Final voltage measurements as follows:
	  
    		 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:     0.956    1.005   1.200  1.202   1.794   1.823    3.327
	              Amps:     1.500    0.188   0.188  1.688   0.500  12.062    1.750
	       Fluke Volts:     0.953    1.001   1.200  1.198   1.796   1.797    3.307
		- Updated IPMC firmware with latest binaries. Log file in folder.
		- Removed IPMC bypass (yellow wire) after testing. IPMC module now has direct control of ISO_12V supply.

- Unit has been placed in the storage cabinet to wait for its turn in the 14SS.
	


05 AUG 2020
- See
  l1calo/hub/hardware/details/Hub_Inventory_Status_Final_Assembly/FluxProblemOnHubs.txt 
  for details.
  
  This note is to confirm that this Hub has been cleaned with G3 flux remover.
  
14 SEP 2020
- This note is to confirm that this hub has been through the component replacement process
  described at the bottom of the file at the above link.    
  
24 SEP 2020
- This hub has been mated with ROD V4 SN11.

06 MAY 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.