Question about Mitsubishi VS-55705 55" Rear Projection Television
Try to turn on.....green light stays lit for about 2-3 secs then turns off !!!
Worked perfectly 24 hours ago next day now I have this problem!! No warnings of any problems at all
What you have there is a V27 Chassis manufatured in 1999..
But it is the same chassis that was later used in their WS55517 65517 and 73517... Regardless of the outcome here are some common caps that ALWAYS need to be replace:
C979 2.2uf 200v
C531 2.2uf 160v
C551 2.2uf 160v
C981 22uf 50v
C402 47uf 35v
Now to your problem, it could be a number of things. The regulator could be suspect, (Ic951 which is a STRF6628) but you might try the following before taking any gunshot approaches. This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input/device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. MAY BE INTERMITTENT, SELF-DIAGNOSIS ERROR 23 OR 24. CHECK SOLDER CONNECTIONS AT CONNECTOR "DY" ON THE YOKES. 2. SHUTDOWN AT POWER WITH SELF-DIAGNOSIS ERROR 23 OR 24. CHECK C411 2200 UFD 35 V AND C412 10 UFD 50 V, BOTH LOCATED ON THE MAIN PCB.
Hope this helps!
Posted on Nov 16, 2007
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