My 5 year old Mitsubishi WS-55819 projection TV has a power problem.
When I press the power button it turns on for about 2 seconds and then turns itself off. The picture doesn't come onto the screen as the power cuts off so quickly.
I opened the back and there is a small black diode type thing (possibly a relay) on the middle PC board towards the back that clicks when it turns on and off.
Someone suggested a leak from the 3 bulbs could be a cause but I cannot see any leaking substances anywhere.
Does anyone have a suggestion to figure out what's wrong?
I don't have electrical test equipment for troubleshooting.
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Re: mitsubishi ws-55819 power problem
Ok let's levelset as is said in the business world today. it looks like you have an overcurrent protection problem which means that the tv set has a component that is causing excessive current to be drawn. Now this can be caused by a component withc has become "leaky" (by leaky this means the inability to prevent the flow of electrons as related to dc voltage). Your last statement is the reason I am replying how I am. Since you don't have equipment your only option is to take this set to a TV repair shop and have it repaired. I have given you a possible cause a component in the HV section that may have gone bad, but without substantial data as to the voltage levels and signal appearances, one can only guess.
I hope this helps and you find what you are looking for.
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Over 95% of the time a 2 - 2 blink code on that model is a convergence output problem. You need to replace both of the convergence output IC's and perhaps the pico fuses feeding them voltage. The pico fuses are F9A04 and F9A05. They are on the same board with the convergence outputs.
No, that'll do it. Once you've changed em you'll know right away if somethin isn't right. But take faith and fire that puppy up. If the pix is good you did good. If something is amiss. I'd be happy to walk you through it. My money is on you though.
Code 22 indicates that your set is in shut down due to what is called Short Protect. The most likely cause is the Converge Ic's drawing too much current and opening one or 2 fuses. Normal repair cost varies by area and servicer. Expect 250 to 350 plus the service call. I normally do this on site.
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 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. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR LEAKY C9A60 470 PF 1000 V PART # 154P400030, PARALLEL TO D9A57 ON THE POWER PCB (NOT SHOWN IN THE SCHEMATIC).
2. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR OPEN FUSES F9A04 AND F9A05 PART # 283P043090 ON THE +24 AND -24 VOLT LINES. IF THE FUSES ARE OPEN THE CONVERGENCE OUTPUT CIRCUIT WOULD BE SUSPECT.
3. SELF-DIAGNOSIS INDICATES SHORT PROTECT. CHECK FOR A SHORTED IC4B01 PART # 270P261020 (VERTICAL OUTPUT) LOADING 24-VOLT SUPPLY LINE. LOCATED ON THE MAIN PCB