CB-Fan Check-In Steps ------------------------ Original Rev. 26-June-2012 Current Rev. 20-Sept-2012 This procedure describes the steps in the process to make a CB-Fan card, as received from the assembly vendor, ready for detailed testing and use by the HAWC experiment. The CB-Fan card contains electrostatic discharge sensitive components. These cards should only be handled while using a grounded anti-static wrist strap and working at an anti-static workbench. When initially touching a CB-Fan card you should touch some part of its ground or power distribution structure. Do not make initial contact to a signal trace or pin. In this way, the current that must flow to bring the card and you to the same potential, will flow through the ground or power nets and not through a signal net. - A safe place to initially touch the CB-Fan card is the 2 extended length pins at the top end of the P1 VME connector or the 2 extended pins at the bottom end of P2 VME connector. - You could also touch the contacts on either of the fuses to make initial contact with the card. H-Clk Final Assembly Steps: --------------------------- 1. Serial Number Write the serial number (1 through 14) on the CB-Fan card. All 14 CB-Fan cards were assembled in the same way, i.e. at this time there is only one type of CB-Fan card. Make an initial entry in the CB-Fan card inventory list for the card that you have started work on. Include in this entry the date, card serial number, and the name of the person who is doing the check-in and final assembly of this card. 2. Install the M2.5 hardware to hold down the VME connectors P1 and P2. Use 10mm screws with washers under their heads. 3. Install the front-panel. 4. Trim the 8 LED leads on the bottom side of the card. 5. Check the parts placement, e.g. are the tantalum capacitors properly oriented, are the pin #1 marks on the IC packages matched with their silkscreen indicators (check especially the easy to mix up small packages), are the connector polarization slots correctly oriented (all on the backplane edge of the connector). 6. Check the soldering, e.g. are there solder balls on the card, check for solder bridges on the high density parts for example U1 through U4 along the front edge, inspect the 4 edges of the chip scale packages U205 through U208. 7. Install "normal" PTN04050A converters in locations K2 and K4. Be very careful when soldering the Vin, Vout, and GND terminals. There is a very large thermal load on these terminals - especially on the GND terminal. Make very good thermal contact to the via because it is the thermal load. The converter pin is a much lighter thermal load. 8. Install "modified" PTN04050A converters in locations K1 and K3. These converters have a different value (15.8k Ohm) internal feedback resistor. Use the same precautions when soldering the terminals on these converters. 9. As specified for the initial configuration setup the ECL <--> LVDS converter to convert from ECL to LVDS. - Install a jumper cap between J231 pins 1 and 2. Pin 3 remains open. - Install 6 pin SIP 120 Ohm 3 isolated resistor resistor networks in locations: R221 through R228. Note the pin #1 orientation of each of these 8 resistor networks. 10. Use the Fluke meter to make a "shorts check". Check from ground to the following points: Vcc at fuse F302, Vdd at fuse F301, Vtt-1 at converter K1 output, Vee-1 at converter K2 output, Vtt-2 at converter K3 output, Vee-2 at converter K4 output. In all cases the Ohm meter should show the charging of large filter capacitors on the scale of a few hundred uFd and after a few seconds you should see a few hundred Ohms between the test point and ground. 11. Power up the CB-Fan card. Record the output voltage of each converter measured from ground to its output pin and measured from ground to its filters output pin. Note the output current of each converter measured by the DC drop across its output choke which has about 64 mill Ohm of DC resistance. Adjust the output voltage of the converters if necessary. It would be nice to be within 2% of the target output voltage. Must setup the ECL <--> LVDS Converter in the LVDS to ECL direction to operate and load converter K3. 12. Initial Tests: - Run an LVDS signal into the first 3 positions of connector J6 (CRST, TRG, CLR) and verify that LVDS or ECL signals are sent out on the correct pins of the 2 LVDS Control Bus connectors J1 and J3 and on the 6 TDC Control Buses on connectors J3 and J4. - Run an LVDS signal into the last (17th) position of connector J5 and verify that LVDS or ECL signals are sent out on the correct pins of the Control Bus Connectors J1, J2, J3, and J4 and on the Scaler Control Bus connector J8. - Run a LVDS signal into the first 4th positions of connector J6 (TRG to Scaler and SBCs_Read_Now) and verify that an TRG signal is sent out on correct pair of the Scaler Control Bus connector J8 and on the 8 single ended 3.3V CMOS SBC_Read_Now signals on J11. - One at a time loop an SBC_Read_Now signal into one of the SBC_n_Busy 3.3V CMOS single ended inputs. Check that the correct LVDS status signal appears on connector J5. - One at a time run a LVDS or ECL signal into each one of the Control Bus Almost_Full_1 inputs and verify that the correct status signal appears on connector J5. - Check at least one pair in each quad of the ECL <--> LVDS Converter in both directions. - Verify the the front panel LEDs both power, TRG, and Clock are working.