[TechAssist] Re: Panasonic LCD model PT-50LC13

trust me, they dont always look bad or broken.
i have found several bad lamps that look fine.
I also wish i knew how to check one, but was told by factory 
to just replace it.
larry


peggs wrote:

> It must be obvious when the Lamps are bad then.
> By that I mean,you must be able to visibly tell that the Lamp has gone 
> bad....... this one is not(visibly).
> At over $250 a piece,I'd like to have a way to Verify that the Lamp is bad.
> I would hate to order one only to find a Bad connection is why it doesn't 
> lite-up.
> 
> Peggs
> 
> At 12:46 PM 2/20/06, J Silverman wrote:
> 
>>Its an arc lamp so it is not supposed to "measure". An interlock prevents
>>you from accessing the kilovolt arc strike and hundreds of high frequency AC
>>operating volts. The lamp life varies from one lamp type to another, but
>>4000 hours is probably a reasonable life to expect. The life is shortened by
>>frequent restarts. Panasonic had a ballast mod kit to reduce the strike
>>voltage, which was causing a reduction in lamp life, for certain models and
>>serial numbers. Some brands have no ballast problems but some brands have a
>>lot. One servicer that services a lot of LCD and DLP projectors says that
>>they always take a ballast along JIC.
>>Jerry Silverman
>>Greentron Inc
>>4 Newland Ave
>>Greenville SC 29609
>>Fax/Phone 864 232 3889
>>mail to: greentron@xxxxxxx
>>----- Original Message -----
>>From: "peggs" <peggs@xxxxxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Monday, February 20, 2006 4:39 PM
>>Subject: [TechAssist] Panasonic LCD model PT-50LC13
>>
>>
>>
>>>My first large screen LCD TV Repair,so excuse the obvious questions.
>>>I've repaired a few Flat panel monitors,and one small 23" flat panel
>>>Televison,but this one is new ground for me.
>>>
>>>Customer is not happy...... he's replaced the Lamp himself once(a few days
>>>out of warranty), that one lasted about a year and his TV is not working
>>>again(same symptom).
>>>
>>>At Power On,Power Light goes from Red to Green momentarily,then to Orange
>>>with 2 quick blinks.....pause....2 quick blinks(and so on).
>>>Lamp measures open(that is by normal 'projector' bulb standards),that's my
>>>first question,How should these Lamps measure ???
>>>But, I also have no Voltage on the Lamp's Connector........ which begs my
>>>2nd question,What Voltage should I measure for the Lamp ???
>>>
>>>Looks like a Lamp and Ballast(board) Repair(man,these things are
>>>expensive),but I thought I better get some input first.
>>>WinStips seems to agree,but in there I see a KIT (LSUC0022) for the
>>
>>Ballast
>>
>>>PCB Repair.
>>>Anybody installed one of these Kits ???
>>>
>>>Peggs
>>>Peggs' Electronics
>>>1519 West 2nd Street
>>>Owensboro,KY 42301
>>>270-926-4968
>>>fax 270-686-7399
>>>peggs@xxxxxxxxxxxxx
>>>
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