Monday, September 16, 2013

HOW TO DISASSEMBLE WelchAllyn VIDEO COLPOSCOPE - Medical Equipment


CAUTION: Lamp area will be hot immediately after lamp operation.
  • Slide access door away from housing assembly.
  • Remove connector from lamp.  Note: Connector has 2 different size holes.
  • Slide lamp away from lamp housing assembly.
  • Observe the correct path for lamp wires.
  • Remove the 4-torx screws from left outer housing with a T-15 screwdriver.
  • Reach under label and peel away from housing.
  • Open outer housing this way to avoid stress on ribbon cable.
  • Disconnect locking connector.
  • Observe the correct positioning of ribbon cable in left outer housing.
  • Remove the 6 Phillips head screws that hold the switch PCB to the left outer housing.
  • The switch pad is attached to the left and right switch PCB by rubber tabs. Gently pull tabs away from switch PCB.
  • Logic PCB is removed by removing connectors and 4 Phillips head screws. Note connector orientation and wire harness path on Logic PCB. Fan wire exits on left side.
  • Gently pull the light director from focusing sleeve.
  • Observe the positioning of plastic tie wrap.  This tie wrap serves as a polarizing filter brake.
  • Unscrew focusing sleeve from lamp housing. Note orientation of light director, filter and focusing sleeve.
  • The glass rod/ferrule assembly may come out with the focusing sleeve.  Do not lose the UV filter in the end of the brass ferrule.
  • Camera chassis removal, from the right housing is accomplished by removing the 3 torx T-15 screws from right outer housing.
  • Remove camera from right housing.
  • Unscrew outer lens.
  • Remove lens gasket and lens filter. Note lens filter tab orientation.
  • Removal of ballast PCB is accomplished by removing connector and 4 screws.
  • Unscrew three Phillips head screws for Sony camera removal.
  • Gently pull camera from chassis.
Note the orientation of fiber washer. During reassembly make sure fiber washer is over the thermal cut out as shown.  Improper installation will result in power supply damage. Use thread lock 222 on the screw.  Do not over tighten.

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