Question about Hitachi 50V500 50 in. HD-Ready LCD Television

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I replaced the burnt out lamp,not working !!!

The exact same thing happened to me.The bulb went I ordered one online, its a philips but the original was manufactured in Belgium,the new one in China.It comes on for 5 seconds then the picture and sound shut down.Once that happens the blue power light blinks for approx 20 seconds then it starts again and shuts down within a couple seconds.It does this over and over.When I push the power button to turn it off the lamp light comes on. Could it be a bad bulb...perhaps drawing too much current?

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  • notgivinup Apr 06, 2008

    I only purchased the bulb...I am using the old housing but thanks. I convinced,after much debating with the online store I bought my bulb from to send me another bulb hoping it was bad...I'll find out this week..

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This may sound crazy. If you still have the old lamp. Put new lamp in old housing, and try that.

Posted on Mar 31, 2008

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Lamp timer needs reset. This is usually an automatic function. TV detects Increased lamp current from previous failed bulb or weak bulb condition and resets automatically. TV must be unplugged for lamp replacement for this to work. Occasionally it must be reset manually, as below:

1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a
second of each other:
DISPLAY Channel 5 Volume + POWER .1. Access Service Adjustment Mode and select the Service Menu that
contains the Category with the Adjustment Item you want to change.
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Note: Pressing 2 or 5 only changes the categories within the
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3. To change the Adjustment Item, press 1 or 4 on the Remote
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4. To change the Data Value, press 3 or 6 on the Remote
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Note: To go back to the last saved Data Value, press 0 then ENT
on the Remote Commander to read the memory.
5. To save the changes, press MUTING then ENT to write into
memory.
6. To exit service mode, turn the power off by pressing POWER .
Wait 2 minutes before restarting the set to allow the fans to
completely shut down or the Service Menu will appear on the screen.

easyab

ConvergenceRepair.com
__________________

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1 Answer

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Pt-50lc13


I fixed my TV. As I said, the TV would come on and work normally for about 1 minute. Then, it would turn off and the red power LED would blink continuously with the fan running, indefinitely. One more thing I did not mention previously is that the LAMP led on the front panel would blink once every 4 to 5 seconds.

After reading many different blogs, I went for the cheap fix first. I purchased the Ballast repair kit, Panasonic P/N LSUC0022. $21. It required opening up the ballast unit and replacing some components on the PCB. I noticed that some of the values of the components were different than the original ones. Unfortunately, the symptoms after this repair were the same. Oh well - no harm done. Perhaps improved it for the long run.

Next thing to try was the bulb. A costly thing to try, but an extra buld won't go to waste if I get the TV working.

Much to my surprise, this did the trick. Works fine now. The bulb had 1600 hours on it.

By the way, I went the less expensive route for the bulb. I purchased the bulb only - not the bulb with the enclosure. It was very easy to do, and much less expensive. I also purchased a Philips brand bulb, which is supposed to be much better than the original. If you decide to go the "bulb only" route, I highly recommed getting it here http://www.discount-merchant.com/Panasonic-TY-LA1500-Replacement-Lamp-bare-bulb-p/panasonic_ty-la1500_lamp_1.htm&Click=1683. This buld includes the wires and connectors, and requires only a screwdriver. This company also offers a Philips bulb with the entire enclosure. Don't get a bulb only that requires cutting wires and soldering!

I did eventually get a service manual. The troubleshooting chart for the LED blink pattern I had indicated the following:

"Wait until the lamp has cooled off. Confirm that the Thermal Fuse Unit is not open. Still NG, replace the Lamp. Still NG, replace the Ballast C.B.A. Still NG, replace the Main C.B.A."

Thanks to the person who responded! Your kindness inspired me to respond back with my results....

Aug 26, 2008 | Panasonic PT-50LC13 50" Rear Projection...

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