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

Wait awhile and you'll see a correction on the B list.

The Old Master Technician
********************************
Since 1972                     *
Jim Myers                      *
Telrad Electronics             *
Fort Wayne Indiana             *
********************************


al m wrote:
> 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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>>>>>>
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