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Ballast power supply on sharp pgf212x.no lamp function

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Sharp projector Bulb replaced but still won't work?


check the ballast

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Nov 08, 2012 | Sharp Projector Lamp For Xv-z90 Xv-z90e...

1 Answer

I have a Sanyo plc-xt25 LCD Projector and when I plug my ac cord in, the fans turn on but no lamp comes on. I changed the lamp and still no picture. What do I do?


Every projector lamp is equipped with ballast. The problem area is ballast. Either the ballast is not getting DC supply or the lamp turn ON signal from the projector main board or the ballast is faulty. Remove the lamp. Connect the projector to the mains supply. Check the voltage at the lamp connector inside the projector without turning it ON. It should be around 65 volts A/C. (Warning: Multimeter will get damaged if the projector power is turned ON due to generation of high voltage) If you find this 65 volts then it confirms that it has DC supply & the ballast is functioning. The ballast receives the the turn ON signal from microcontroller through opto-coupler on the ballast. The ballast opto-coupler can be checked by providing external 5V DC supply between pin 3 (+ve) & 4 (-ve) in turn switches ON the lamp. If this works then there is no problem with your lamp & ballast. The problem lies with the main board. If this does not solve your problem then give me the feedback.

Aug 04, 2011 | Sanyo PLC-XT25 LCD Projector

1 Answer

My projector wont turn on anymore, what do you think the problem is ? power supply or the lamp?


Some projectors will not start if you have seriously exceeded the normal life hours of the lamp. If you do not replace your lamp when notified by your projector, the lamp will continue to get so weak that the starting amperage of the ballast will eventually make the lamp explode in the projector. manufacturers don't want you to have to vacuum out bits of glass and mercury from the projector, so they just stop the projector from working until a new lamp is installed.Do you hear a ticking sound of the ballast trying to start the lamp?

Aug 16, 2010 | Sharp Office Equipment & Supplies

1 Answer

Sharp XG-3790E projector switches off soon after it is switched on


if you replaced the lamp recently, you'll need to reset the lamp timer. if it's a dlp projector, could be the colorwheel. listen for a high-pitched whir when the lamp strikes. if you don't hear it, replace the colorwheel. if you do, check the fans to make sure they work. if all else is fine, replace the ballast/power supply.

Nov 17, 2009 | Sharp Office Equipment & Supplies

1 Answer

Replace lamp and lamp light continues to blink and will not come on. lamp is good but will not power up. fan is on so there is power. any suggestions?


Usually if the lamp light starts blinking and it will not fire up after the lamp is installed then that means that you still have the lamp door of and the toggle switch that detects the lamp door being off is activated and so the tv is in failsafe mode and is not turning on to protect you. If you know that you have the lamp door back on and the switch is pushed back into place as it is supposed to be then the issue is most likely your ballast. The ballast can appear to be the same symptoms as the lamp. If the lamp itself was not damaged or broken then its possible the lamp was fine all along and the ballast is bad. The ballast is the board the connects to the lamp and charges up the high voltage to fire up the lamp. If it is damaged in some way then the lamp will not fire. Just as a precaution you can test the wire connected into the ballast from the power supply board and make sure you are getting voltage. If you are getting voltage and the lamp is good and the lamp door toggle switch is not activated or the lamp temp board wire is not unplugged then you definitely have a ballast problem. Those are the only components that can cause the lamp to fire. The lamp temp board is a little board on top of the lamp housing that just has 1 small wire connected to it that is a thermometer. If that is unplugged the lamp will also not fire. So, requirements for fire lamp:
1. Power from power supply board to ballast
2. Ballast converting power out to lamp
3. Lamp door switch must be suppressed
4. Lamp temp board must be plugged in and functioning.

Jun 26, 2009 | Panasonic Televison & Video

1 Answer

Where are the fuses in a Sharp xg-nv3xb notevision3 projector


Main line fuse is on the board where the ac cord plugs.
The caps in the power supply usually leak and explode after 5 years, blowing the fuse. Solution is to replace the power supply and lamp ballast boards. Expensive repair.

Nov 09, 2008 | Sharp Notevision PG-A10X Multimedia...

2 Answers

Projector


Does the temp. light come when it switches off ?

Check if all the fans are running when switched on.

If all the fans are running - take out the lamp and check if you can see any irregularity on the shaft of the lamp's insides.

If not then you will most probably have the Ballast ( Lamp's powersupply ) replaced or repaired

Apr 02, 2008 | Sharp Notevision PG-A10X Multimedia...

1 Answer

Sharp XG-P10XU lamp problem


power supply or lamp ballasts, both are pretty common to produce results as you describe, looking at $600.00 or so to repair. if those are the only things wrong.

Dec 07, 2007 | Sharp Notevision XG-P10XU Multimedia...

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