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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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27" Panasonic tv model:CT-27G7DF,chassis:JP363 (N7DM)
27" Panasonic stereo tv model:CT-27G7DF, chassis:JP363 (or N7DM),
year: Feb 2002, S/N: LB20391450, Howard W. Sams # 4599,UL listed 436L.The customer complained that the tv had intermittent shut down so in my shop I did not notice the problem but I decided to go ahead and replaced parts recommended by other techs (common repair tips): D805=MA4056MTA=5.6v,1/4w =NTE5011 D802=MA165TA5VT=1N4148=NTE519 D821=MA4047HTA=5.1v,1/4w=NTE5010 Remove C035=1 uf,35v Changed parameter 000 in EEPROM to 007 I soldered parts throughout tv even though they looked good According to common repair tips by other techs I was told to check these parts: D055=near action button & is action line to MPU D820=B+ OVP D821=B+ OVP these also tie to action line J119= check J119 if cap there remove it, if not there then remove C035=1 uf,50v near x-tal Which I did & they were fine. For a similar repair tip if the tv will power up only after removing ac cord then reapplying replace: Panasonic kit # TXASK03ESER1=contains EEPROM (IC002),MPU (IC001) & instructions=$44.71 CDN (3 weeks) I did not replace it as I don't want to do costly trial & error troubleshooting. Another common repair tip is to also check L805 & C827 for cold solder & redress all wires including speaker wires away from crt which I did. Conclusion: this repair was done exactly 1 year ago and 1 month later the customer called and complained that the tv shut down once intermittently but no problems since so yesterday the customer called and stated that the tv began to shutdown intermittently so I am waiting for the tv to come. Anyone have any common repair tips for me?, thanks in advance. Sidney Dartmouth, Nova Scotia Canada |
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