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PS2342257 WIRING DIAGRAM

TRANSISTOR ON CIRCUIT BOARD

Posted by Anonymous on

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Posted on Jan 02, 2017

budmrtn
  • 11361 Answers

SOURCE: Viewsonic VX924 monitor SMPS failed. Replaced all

When the DC filter caps no longer filter out high frequency AC, that AC will be fed through out the circuits and cause damages such as the inverter frequency will be running at the wrong frequency and caused overheating.
The service manual does not show the sch of the power supply/inverter board because it is not designed by Viewsonic.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX924/

Posted on Mar 27, 2011

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Viewsonic VX924 monitor SMPS failed. Replaced all bad capacitors and have found that one pair of inverter driver transistors has failed. They are marked as DKQR (They are apparently Rohm 2SC4672...


When the DC filter caps no longer filter out high frequency AC, that AC will be fed through out the circuits and cause damages such as the inverter frequency will be running at the wrong frequency and caused overheating.
The service manual does not show the sch of the power supply/inverter board because it is not designed by Viewsonic.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX924/

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