Panasonic TC-29FJ20G TV sometimes field amplitude becomes smaller, sometimes the image of normal, fault free repair method of sound -Service Manual Download|Circuit Download|Download Drawings|schematic download|route map download|free download user manual

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Panasonic TC-29FJ20G TV sometimes field amplitude becomes smaller, sometimes the image of normal, fault free repair method of sound

Time：2014-06-19 10:31:31 Source：Network Author：Unknown Clicks：1224

From the phenomenon analysis, data, audio circuit, field scanning circuit may cause the failure. 6YWservice manual download site
6YWservice manual download site
Test the data line voltage from 3.6 V to 3.6 V and 3.6 V ~ 3.5 V, normal should be 4.1 V ~ 4.3 V and 4.3 V ~ 4.2 V, considering the presence of the phenomenon of sound, and sound circuit problems can also affect the data, so check the audio circuits in the first place. Audio waveform measurement have been input IC2101, but no output, audio crystals of oscillation circuit. 6YWservice manual download site
6YWservice manual download site
6YWservice manual download site
Replace the crystals X2130 troubleshooting. 6YWservice manual download site
6YWservice manual download site
Because of the data bus control circuit, the audio circuit, such as problems may cause other fault phenomena, so when maintenance should be paid attention to.6YWservice manual download site