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

This is A list!!!!!!
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message ----- 
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 21, 2006 12:07 PM
Subject: [TechAssist] Re: Panasonic LCD model PT-50LC13


> Switching to the B list on purpose.
>
> I sent the TS guide to your email, did it get there ok? It has the error
> codes as well as the ballast troubleshooting information.
>
> The Old Master Technician
> ********************************
> Since 1972                     *
> Jim Myers                      *
> Telrad Electronics             *
> Fort Wayne Indiana             *
> ********************************
>
>
> peggs wrote:
>> thanks Jim,
>> Bob Waterman sent me the files for the Kit,and a file with a
>> troubleshooting Hint.
>> BTW,I previously stated I was getting no 'soound' from the Ballast PCB,I
>> was wrong I had the interlock(lamp cover) open.
>> There IS some 'sound' coming from the Ballast PCB,sort of like a ticking
>> sound...... but the Lamp looks good....... GREAT !!!
>> I'll try your suggestions.
>> BTW,I get a Green flashing Power light for about 2 minutes at Power 
>> On,then
>> it turns to Red flashing Power Light.
>> This Hint file says I should also have a 'Lamp LED Flashing' IF the 
>> Ballast
>> is Bad........ what/where is the 'Lamp LED Flashing' suppose to be ???
>>
>> Peggs
>>
>>
>> At 07:56 AM 2/21/06, Jim Myers wrote:
>>
>>>Sometimes the lamp is bad but looks just like a good one.
>>>There are a few things to check on the ballast, you can unmount it,
>>>remove the shield cover and flip it around to get to the front of the
>>>board. Then check across P1302 and P1303 for AC line voltage.
>>>Check P1301 pin 4 (the tech line guy said 17v but I get -81v)
>>>Check P1301 pin 1 (the tech line guy said 19v but I get +92v)
>>>Maybe I heard wrong
>>>Then check P1305 pin 1, should be lo in standby and hi when power is on.
>>>Then check P1305 pin 2, it should go hi when the lamp should turn on.
>>>
>>>On the PT-60LC14 that I am working on the lamp does not light, I jumped
>>>P1305 pin 1 to pin 2 and the lamp then lights so I know the lamp is
>>>good, it should be since it is a new lamp. Anyway you can make these
>>>checks and maybe verify if the lamp is good and possible if the ballast
>>>is good. The one I have is a Store Stock set so I can play around with
>>>it and order parts to try, I have the ballast on order now since it
>>>looks like it should turn the lamp on but does not.
>>>
>>>The Old Master Technician
>>>********************************
>>>Since 1972                     *
>>>Jim Myers                      *
>>>Telrad Electronics             *
>>>Fort Wayne Indiana             *
>>>********************************
>>>
>>>
>>>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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