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Topic: Panasonic PT-L300U Problems
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Joined: Jan 17, 2007
Posts: 6
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Hello, this is my first post. I'm looking for advice or troubleshooting hints about my ptl300u LCD projector.
The lamp had an unknown number of hours on it, I was operating the unit with lamp power on low and fan speed on high. I switched to the shutter function while I wasn't watching for a few minutes. When I went to switch back, the unit didnt respond. I was forced to switch it off manually.

Now when you turn on the power switch the "standby/power" led is orange, and the "lamp" led is red. When the power button is pressed the power button turns green, and the lamp lights for about 10 seconds. The green power led blinks, then red "temp" light comes on, along with "lamp" led. The bulb shuts off and the fan runs for a minute or so, then nothing happens.

So I assumed the lamp was shot. I removed the old one, and the reflector looked slightly damaged and cracked.
I bought a new panasonic lamp. Installed it, and nothing changed. the lamp will still kick on for a few seconds and shut off.

The fan runs, so I doubt anything is over temp in a few seconds of operation
Do these have some kind of temp sensor that goes bad?

Is there some way to reset the computer?
Any suggestions on what my next step should be?

Thanks
-Dan
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Joined: Jan 17, 2007
Posts: 6
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bump for thursday
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Joined: Jan 19, 2007
Posts: 4
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Hi Dan,

First things first,i"m replying from across the pond so i am assuming that your Projector is the US equivalent of my UK model (PT-AE300E). If not,then please ignore my suggestions & accept my appologies.

I take it that you no-longer have the manual for the PJ(projector) as you ask about resetting
the PJ after lamp changing.

Basic stuff first: Double check the new lamp for type & any visible damage.These lamps are very sensitive, even to fingers touching the front glass,so any fingermarks (generally means a new lamp).This is because the acid in the skin of your fingers affects the quartz glass.
Next: Check installation,tightness of fitting & screw tightness.

Replace cover making sure NO wires or heat sensors are trapped(there's plenty of them inside for monitoring various heat points,i know i've just cleaned & serviced mine & believe me it's a nightmare in there).Secure cover properly(there are sensors on the fitting of that as well).

Replace PJ to viewing position(you need to access screen menus for the next bit).Power up as normal.(In case you've no manual this is as follows):
If the POWER LED does not illuminate RED when the MAIN POWER switch is turned on,turn the MAIN POWER switch off again and check that the lamp unit & cover are securely installed (power up procedure will not start if they are not).Then turn MAIN POWER switch back on.

Nextress the POWER button so that a picture is projected onto the screen.

NOTE : If no picture is projected or lamp does NOT light,refer to a service engineer as there may be a problem with the power managment system(possible faulty sensor) & this will have to be checked further.

If successfull, press MENU button to display MAIN MENU screen & select OPTION.
Enter OPTION menu & select LAMP RUNTIME .If not already reset this will show if the lamp was nearing the end of it's usefull life (that is over 1800H (hours)).

Highlight this option & press ENTER for approximately 3 seconds.
The "LAMP RUNTIME" will change to "TIME RESET [POWER OFF]"

NOTE: If the MENU button is pressed at this time the lamp time resetting screen will be cancelled.

TURN OFF THE POWER ( by pressing the POWER button)
This will reset the cumulative usage time for the lamp unit to zero.

As a precaution after power down has finished ,allow the lamp to cool for a while before powering back up again.(about 5 to10 minutes should do it.

Well that's the procedure from the manual (in case you haven't got one).
I hope it helps in some way.If not, let me know.

Regards Tim.

Quote (dansciol on Jan 17, 2007 4:14:29 PM):
Hello, this is my first post. I'm looking for advice or troubleshooting hints about my ptl300u LCD projector.
The lamp had an unknown number of hours on it, I was operating the unit with lamp power on low and fan speed on high. I switched to the shutter function while I wasn't watching for a few minutes. When I went to switch back, the unit didnt respond. I was forced to switch it off manually.

Now when you turn on the power switch the "standby/power" led is orange, and the "lamp" led is red. When the power button is pressed the power button turns green, and the lamp lights for about 10 seconds. The green power led blinks, then red "temp" light comes on, along with "lamp" led. The bulb shuts off and the fan runs for a minute or so, then nothing happens.

So I assumed the lamp was shot. I removed the old one, and the reflector looked slightly damaged and cracked.
I bought a new panasonic lamp. Installed it, and nothing changed. the lamp will still kick on for a few seconds and shut off.

The fan runs, so I doubt anything is over temp in a few seconds of operation
Do these have some kind of temp sensor that goes bad?

Is there some way to reset the computer?
Any suggestions on what my next step should be?

Thanks
-Dan

Tim-UK42
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Joined: Jan 17, 2007
Posts: 6
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Hi Tim, Thanks for the reply. You are correct, Im in the US, with the pt-l300u.
I will recheck the lamp door and the connections there. However I don't think this is the problem.
I received a response elsewhere about this problem. I hear this unit has 4 fans, and one may possibly be jammed.
I think I will take it apart and take a look around.
I appreciate the response. I will let you know what happens with it.
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Joined: Mar 28, 2005
Posts: 10,052
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Please respond back and let us know. I've been having great luck with my PT-L300U for about 3 years or so now. Yeah, likely to upgrade to 1080p this year... but not yet!
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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