Thursday, September 20, 2012

SAMSUNG DLP PROJECTION TV All front panel LED blinks Service help [8]



                                              [8]
All the three front panel LED blinking is the most common fault.  It can be caused by Defective Lamp, Defective Color Wheel, Fan Failure or due to other defective components.  

  • Check whether the Color Wheel run.  If it does not run, replace Color Wheel Assembly.  If Not Good, replace DMD board.
  • The Color Wheel runs, and the Lamp is On with No Video.  In this case, check the connector CN-103 on the Digital Board.  If it is found OK, DMD board should be checked and repalced.
  • Color wheel runs, lamp On.
  • The Lamp does com ON, then shuts Off.

  1. Check 220-280V DC to lamp ballast.  Measure this voltage at [CN-1] with a DC meter.
  2. If it is not good, Replace Power Board.  If it is OK;
  3. Re-Install Lamp Assembly.  If not good;
  4. Check Pin-2 of [CN504-Lamp enable] on DMD board for 5V P-P.  If not good, Repalce DMD board.  If OK, Replace Lamp Assembly or Ballast.
Lamp come On, and shuts Off.
  • Check [0V] at CN-504 [lamplitz] pin-5 on DMD board.  If found OK, Replace DMD board.  If not good, Replace Ballast or Lamp Assembly.
Color Wheel

Actuator

Lamp Ballast

at