Hello. I testing, the mitsubishi wd-57831 dlp TV for fun and hobby . i removed ballast board and replace xenon lamp & kit! now everything is OK but the FB cable has been left unused cable and TV and three attempts to power on but finally off. I think I must be one of the wires would enable the FBI to allow on TV but I do not know which wire in FB cable is for power on tv and dlp system. thanks for your help ... fb cable= 1- lamp LIT 2- GND 3- +5vs 4- lamp _EN 5- DIM
You are going to ruin the optics using a Xenon lamp. The ballast in the TV talks back via UART to the CPU. By removing the ballast the TV cannot talk to it and run itself properly. Also using a xenon lamp will give terrible color reproduction as its not putting out nearly enough lumens in the right spectrum. It will also bombard the color wheel and DLP chip with UV light and ruin those as well.
Testimonial: "thank you dear rostit. Yes, you're right. But the lumens of light not important for me and only for testing. I'm going to call up the TV hacked to any desired lamp connected to it. For projectors, this work has already been done correctly."
thank you dear rostit. Yes, you're right. But the lumens of light not important for me and only for testing. I'm going to call up the TV hacked to any desired lamp connected to it. For projectors, this work has already been done correctly.
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SOURCE: Replaced lamp and now can't get a picture
Hi Sally Jo, Unit powers on and works properly for a while then shuts off with a red lamp LED (lamp error). Suspect bad lamp part # 915P020010 2. Lamp enable line at J14 pin 6 does not switch to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 3. At power on the lamp turns on and off three times and then the unit shuts down with a red lamp LED (lamp error). Replace the Light Engine part # 939P977010 4. Check for 12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check for an open F9A09 on the Power PCB, if it is open replace F9A09 part # 283P127060 and the Light Engine part # 939P977010 5. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 6. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 934C148001. Hope this helps!
SOURCE: Mitsubishi Projection TV Power Supply Board assistance - Model # WD 62525
Mr.Marxxx you need to let one of your friends fix it for a small fee.Just like everyone else does.
SOURCE: Buzzing noise from Mitsubishi DLP WD-52327 after replacing bulb
Did your replace lamp come on the screen or did you lose picture? Just because the LED indicator suggest replace lamp it doesn't mean it needs it. If your pix was dull or loss of brightness then replace it, if not then just reset your lamp timer, check your owners manual for instructions.
SOURCE: Mitsubishi WD-65733 no picture, electrical buzzes in series
What it sound's like is that the lamp ballast is the problem. Buzzing sounds like when the power is first brought to the ballast it has to ramp up the voltage to get the lamp to light, then the voltage drops back down when the lamp is lit. Sounds like the lamp ballast isn't ramping up the voltage the way it should. May have to replace it. A good service shop would be able to do this for you.
Blessings,
A/V Media Guy
Testimonial: "very helpful. this was my first thought! thank you!"
SOURCE: 52HM84 Toshiba DLP with apparent failed lamp (replaced ballast)
I found R3 on the original board to be open, along with reading an open on CR1, D5 and D6. All the other transistors and the transformer check out. The only thing I have to do now is find out the specs of the diodes. The replacement board also had CR1, D5 and D6 open (R3 was OK). There had been some threads on various locations where remanufactured boards had bad components (the transistors were changed but not some of the other components).
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