I need help with a Hitachi 51UWX20B Rear Projection CRT television. When I turn it on, the front LED turns on, but I receive no picture or sound. I opened up the rear panel and on the power supply board, there are 5 LED's. 4 green, and 1 red. Three of the green LED's and the red LED all stay on consistently, but the final green LED blinks on and off (with a clicking sound). I have done numerous convergence repairs on these types of TV's, but have never encountered this specific problem. I have not touched or replaced any parts in the TV, I just got it from someone else in this condition. The LED that is blinking is the second green LED closest to the FRONT of the TV (screen side). Also, is this TV supposed to have two different IC's for the convergence? It has one STK392-110 and one STK392-150. Weird... Any assistance would be greatly appreciated. thanks!
The 392-150 is a higher current device then the 110---you can use either--this is normal in the hitachi sets---I usually replace both with 150's---check the led that does not light---should indicate which voltage source is bad---if it is one of the 2 voltages for the convergence ic's(one is a positive and the other a negative voltage) then the convergence Ic's may be bad---look for any discolored resistors around the ic's---one way to tell if it is a convergence ic is to de-solder both ic's and see if the set turns on(the convergence will be out the window) but if it comes on change both and do the alignments with the Hitachi remote. By the way----the led should have a location number printed on the top of the circuit board.
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