Hisense 32K20DW came in for repair. It has normal steady power to main , but the led line to the backlight leds is going from 80.6- to 87 volts, with or without the led line connected, ideas?
Mike
Mike
Attached Files
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Re: Hisense 32K20DW power problem
Can I get focused pictures of the power supply board, i canot read the pin labels of the black connector that is connected to the main board, I cannot also read the board model number on the bar code sticker.
What is the Voltage rating of that blue cap close to the LED connector?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 32K20DW power problem
The Blue cap is a 100v 100uf , peak meter reads 98.9uf and 0.12 ohm
heres better pics
mikeAttached FilesComment
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Re: Hisense 32K20DW power problem
Then the 80V output at the LED connector is the correct output Voltage, so more likely you have open connection somewhere in the LED string (the LEDs are connected in series).
Pictures provided by SHOPJIMMY.Attached FilesNever 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=24809Comment
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Re: Hisense 32K20DW power problem
I've seen these sets and thier 42 inch counterparts have a positive wire short to ground inside where the wires attach to the string. It's a piss poor design where the strips have a sharp edge that cuts into the positive wire overtime from thermal cooling and heating up moving the wireDid I leave the soldering iron on?Comment
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Re: Hisense 32K20DW power problem
Great help guys, will let you know what i find
MikeComment
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Re: Hisense 32K20DW power problem
led was bad in the 2nd string , had a good strip from same model , works fine. Thanks guys for the help
mikeComment
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I have an LG Plasma TV 60PM6700 for the past ~12 years.
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Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
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