Question about Hisense Televison & Video
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Posted on Jan 02, 2017
There is a bad solder connection in the vertical sweep circuit. if you know how toi solder, go and find the vertical output IC and resolder that first.. but if you have no solid state electronic repair experience, please find a trained tech to assist you in this repair, as if you wait it may end up costing you double of what it would now, so haveit done ASAP. Good Luck Please do not forget to rate this one.
Posted on Oct 16, 2006
SOURCE: Flickering blue picture
I finally got around to dismantling the TV. This is no mean task. The chassis is tethered to the rest of the set my over a dozen wiring harnesses and a few of these cannot be disconnected near the chassis but instead require removing the “right support” near the air duct and taking the shield off the lamp ballast. Once the chassis assembly is out, it is a further significant task to disassemble it to get at the various PWBs (POWER, FMT and DM) having the suspect caps. I’m sure reassembling everything will be a fun job!
I have not yet had a chance to fix and reassemble but I wanted to post this no as I’m not sure when I will get around to it.
I did find six of the fourteen known-problem caps to be visibly bulging -- both 3300s and two of the four 1000s on the PWR PWB plus two of the four 1000s on the FMT PWB (see photos below). Ironically of the four 1000s on the DM PWB, which I have heard are the most common to go bad, were bulging and I considered skipping these as the DM it is the toughest board to extricate from the chassis, however I figured I had come this far and I would just as soon replace all twelve 1000 uFs as the parts cost $0.23 and I really never want to have to do this again.
If I had to bet, the two 10V 3300uF caps on POWER board, which were actually leaking black goo, are the actual culprits, but with four of the 1000 uFs also bulging it is probable only a matter of time until they failed as well.
Here is the POWER PWB with the known-problem caps (C9A37, C9A38, C9A51, C9A52, C9A61 and C9A62) highlighted:
here's the FMT PWB with the known-problem caps (C8F19, C8F21, C8F22 and C8F27) highlighted:
and the DM PWB with the known-problem caps (C81A2, C81A3, C81B3 and C81B4) highlighted:
Here are close-ups of the bulging caps (C9A37, C9A38, C9A52 and C9A62) on the POWER PWB:
And here are close-ups of the bulging caps (C8F19 and C8F27) on the FMT PWB:
Posted on Feb 16, 2008
I have found the problem with my r700 screen flick. If you hold the sides of the screen and pinch them it brightens which is a loose conection. This is a fault witht he design. You may notice that its quiet stiff to open the R700 screen and this puts stress on it. seeing most people open from the centre this bends the edges causing a loose conection.
You need to take out the LCD and check all conections are all in ok. Then make sure the LCD is firmly in place before putting back together and tight.
Mine is now working like when i bought it.
HAPPY DAYS !!!!!
Posted on Nov 13, 2009
SOURCE: Hisense tv turns on and off
The unit has a fault on its power board and sustain board.
It turns off because the sensor is preventing some component from bacoming overheated and catching fire or damaging further components. Seel professional repair.
Please rate my help++++Thanks for using FIXYA
Posted on May 13, 2010
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