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 >>>>>> >>>>>>-------------------------------------------------------------------------- >>>>> >>>>>--- >>>>> >>>>> >>>>>>This Email List is accessible to the general public through search >>>>> >>>>>engines. 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