Panasonic PT L501u Replacement Lamp

How long ago did you replace the lamp?
If the lamp has not actually been replaced and you are attempting to bypass this safety feature then I have bad news for you. Once the projector determines current flow through the lamp has exceeded the threshold amount, it will put the projector into the mode it is in now - Critical Lamp Replacement. You can set the projector bulb to low power output and see if that allows you to reset the bulb life timer but, again, if you have not actually replaced the bulb assembly, you are in danger of the bulb bursting under pressure. This can actually damage the projector.

You can find the manual for your projector at

ftp://ftp.panasonic.com/projector/ptl785u/pt-l785u_oi.pdf

You need a new lamp. Cost is around $350. The following site shows replacement:

http://www.shopvsc.com/Replacement-Lamps-for-Panasonic-Projectors-s/284.htm?searching=Y&sort=7&cat=284&show=50&page=1&f-PT-AE900=109462

Link

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Hi Opokuagyeman,

Suggest that you consult the Panasonic Support Team for your lamp replacement.

Thank you.

1.Press the MENU button to display the menu screen, and
then press the F or G button to select the OPTION menu.
2. Press the ENTER button, and then press the F or G button
to select LAMP RUNTIME.
3. Press and hold the ENTER button for approximately
3 seconds. The confirmation screen, “LAMP RUNTIME
RESET.” is displayed and select OK.
4. Turn off the power.
�� This will reset the cumulative usage time for the lamp
unit to zero.
***Here you go and best of luck!***

was this bought new or second hand?
There is a "Lamp Time" setting that can be accessd using your remote control, check this setting.
Look on page 40 and after that of your manual about ambient temperature bulb failure.

By powering off or hittign the reset button the bulb should stay on IF the projector is gettign a signal from a device to show an image. If the projector is not hooked up to a device, laptop, TV, etc. the bulb may turn off to save hours of operation.

Hi BEEZELLE

Does the VGA input work ?

If not then the Mainboard is at fault and will need either repair or replacement.

Right , if the indicator light goes from Green to Orange when shutting down , it will be the Powersupply that is giving problems and not the Ballast.

Hi there

Have you replaced the lamp ?

If you haven't - take out the lamp and chech for any irregularity on it - i.e. - discolouration , vein like looking marks ( black or white ) and also if the shape of the shaft is off.

If there is no visible damage it might be a faulty Ballast ( lamp's powersupply ) - especially if you cannot get it out of stanby once it has shut down.