I have 2 horizontal transparent lines rolling up a Hisense lcd40v57ca TV screen.
Could this be 120Hz Ripple from bad caps in the power supply?
Thank You.
Could this be 120Hz Ripple from bad caps in the power supply?
Thank You.
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Re: Hisense lcd40v57ca 120Hz Ripple
I would suspect bad filter caps in the power supply, and in the main board, try heating the caps with hair dryer to see if it gets better.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Hisense lcd40v57ca 120Hz Ripple
Someone else here had a Hisense LCD with a bad main filter cap but they did have different symptoms.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Hisense lcd40v57ca 120Hz Ripple
Hi,
with 99.9% probability it´s the mains filter cap, since in switching power supplies you only find 60/120Hz on the primary side of the supply. Had the same issue with my satellite receiver, two lines on the screen, sometimes rolling upwards, sometimes downwards. Mains filter cap was totally dried out (not bulged!), no capacity anymore. Replacement should have same or more capacitance, same or higher voltage range, it´s a good idea to take one with higher temp range (105°) for a longer life.
Greetings,
WolfComment
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Re: Hisense lcd40v57ca 120Hz Ripple
Thank YouComment
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85” Hisense TV
Greetings,
Request for Technical Assessment – Faulty Hisense 85Q6NAU TV
Dear TV technicians of forum, I hope this message finds you well.
I am writing to seek assistance regarding my 85-inch Hisense Smart TV, model 85Q6NAU, which is currently experiencing a fault. The unit is approximately two years old, and I am not sure if it has a warranty.
I have attached a photo showing the issue for your reference. I would appreciate it if your experienced technician could kindly review the image and provide some insight... -
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Hello,
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