• Topic ID: id_16157901
  • Version: 4.0
  • Date: Nov 27, 2020 2:17:01 AM

Broken Interposer Pin Removal

Prerequisites

Overview

If you are reading this you are in desperate trouble. A male pin is broken off in a female socket. You have two choices:

  • Replace the DAS Chassis if pin is in the backplane BGA connector or replace the Detector if pin is in a flex lead.

  • Attempt to remove the broken pin.

    note:

    Do not break a pin off a good interposer so it will fit. Microphonics noise and/or image artifacts will result.

    There is no specific procedure for this action. These are suggestions that may save you significant time and expense.

  • Procedure Objective

    • Use the sharp pointed tool to raise the broken pin out of the female socket. Raise it enough so that a fine tipped wire cutter can extract the pin fully.

    • You will need a magnifying glass, ESD protection, Nitrile gloves and very sharp strong pointed tools.

    • Use ESD wrist strap & Nitrile gloves to prevent further damage to detector FETs or DAS electronics.

  • Procedure Summary

    • Lower table and lock gantry at the 6 O’clock position.

    • Steady your hands on your knees or other surface.

    • Carefully raise broken pin out of the female socket.

    • Remove broken pin.

    • Install new interposer.

    • Verify proper operation.

Procedure

  1. Move the table to its lowest position.
  2. Place the DAS near 6 O’clock and lock it in place. This will allow you to sit comfortably and use your knees as a resting place to keep your hands steady.
    3. Notice Image
    • notice
    • Always turn OFF the HVDC before the 120 VAC. Turning OFF 120 VAC power before HVDC power can result in equipment damage.
  3. Turn OFF Axial Enable, HVDC, and 120VAC switches on the Service Switch panel.
  4. Lock the gantry in position, using the rotational lock.
  5. Use the magnifying glass to closely inspect the broken male pin. A small section should be visible since the female socket is cone shaped. Male pins generally break off at the base.
  6. Use a biopsy needle (18 gauge or larger) or a dental pick with a thick working surface. See Figure 1.

    Figure 1. Emergency Interposer Pin removal tools

    note:

    Note the following:

    • Biopsy needles can be found in most medical facilities.

    • Dental tools can be obtained from most Dentist offices. They regularly discard older utensils.

    • A grease needle can be purchased at an automotive parts store.

    7. Notice Image
    • notice
    • Be very careful not to damage the female connector. Deep scratches or gouges are bad and the component would need to be replaced.
    • - Do not “Dig” the pin out. This will damage the female socket or connector.
    • - Do not put anything in the female socket such as a needle.
    • - Be careful of metal shavings. They can cause problems elsewhere.
    • - Do not attempt to drill out a broken pin.
  7. Remove raised pin with side cutters or needle nose pliers.
  8. Install new interposer.

Finalization

  1. Notice Image
    • notice
    • Always turn ON the 120 VAC before the HVDC. Turning ON HVDC power before 120 VAC power can result in equipment damage.
  2. Do the following:

    • Assemble gantry and restore power.

    • Allow DAS to warm up for 1 hour.

    • Perform Image Quality testing.