Question about Toshiba Televison & Video
I work at Q13 FOX in Seattle and we have about 12 of the Toshiba 27DF46 tv. Almost every single one of them had the same problem with a vertical foldover. After testing almost all of the electrolytic capacitors I found that the capacitor C407 was the culprit. It is a 35v 100uF capacitor located to the left of the vertical circuit chip (LA7847). I also had the capacitor C432 (160v 47uF) fail on a few of them. It is part of the power circuit. Last but not least, I was having a thermal power up problem on one machine. It seems as though it is coming from the power area but it is so intermittant that I couldn't track it down. I also found that once it is plugged in to power that it would work fine after being plugged in for about 20 seconds or so. If someone else has experienced this issue and has a fix let me know as I still have 9 more of these bad boys to take down from their wall mounts and fix the vertical foldover issue... Thanks and I hope this may help others on the solution I found.
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Posted on Jan 02, 2017
Bad capacitor / IC in vertical circuit...usually a shop repair...
If not corrected,could get worse in short period of time,.....T.
This model also requires an upgrade kit for future reliability...
Philips part number 483531057673 senior tech only.......
Posted on Jan 27, 2008
SOURCE: Toshiba 36A50 Horizontal Line
Ok, The vertical Ic is IC301 Ta8427K And Capacitors around IC chroma 2.2 uf 50 volts. You will see small red capacitor ( with C302....4 or 5 ) reference. Replaced others capacitors on vertical section 220 uf 35 V or 100uf 35V. I hope this can help you. Or if do you have any picture chasis, send to me and I will show you where are the problem., Thank you
Posted on May 11, 2008
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