hi i have [B]LN46A500T1FXZA[/B]
and there are overpriced repair kits for not powering on...and or powering on with no image...bl on...and intermittent loud screech sound coming out of speakers
the parts are ic101 and c102 on main board
can someone tell me the ic101 part descriptions so i can order myself...and does c102 replace have to be 100uf?..if not what range of values could be used? i see someone usef 47uf and it worked.hi i have [B]LN46A500T1FXZA[/B]
and there are overpriced repair kits for not powering on...and or powering
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Last edited by shelby5041; 12-04-2023, 07:09 AM.
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Re: LCD tv power supply transformer magnets broke off
Thanks for the good info but
Its just a cheap lcd tv
Ill just use 100% silicone caulking i have on hand..
If it was something expensive or something i was going to keep long term i would use more appropriate silicone but its just a typical modern day crappy made lcd tv so
Thank you
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Re: LCD tv power supply transformer magnets broke off
Hi...i did superglue it and tv powered on fine as i expected
The unknown is how will it affect long term use...i dont usecthectv so ill never know
When you say silicone what area are you referring to?
Can i just incase the entire ferrite perimeter in silicone? And is it just 100% pure siliccone caulking or a silicone based heat resistant glue?
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Re: LCD tv power supply transformer magnets broke off
hi JR
i glued the ferrite back in place as best i czn with super glue
i did test the ps outside of tv i do get 5v standby so i assume tv ps will porb work but as you said for how long
i really dont care for how long since the tv is just a project tv..i dont use it
so tomorrow i will install it in the tv and see what happens
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Re: LCD tv power supply transformer magnets broke off
thank you
this is not worth repairing as it is just a tv i found in trash
i dont put money into tvs anynmore..not worth it
lcd tvs are worthless nowadays
ill just glue it together and see if tv powers on..if it does ill just leave it as is
if it no power on ill just toss tv in trash
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LCD tv power supply transformer magnets broke off
Hi
I have a typical lcd tv poeer supply
I dropped the board snd the magnets on the dc transformer broke off
Is the board no good now?
What is purpose of the magnets mounted on both sides of transformer
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Samsung LCD TV no picture backlight on no 12v at tcon
hi
i have a samsung lcd tv
it powers on with sound and backlight but no picture
all voltages from PS are good 12v 3.3v and 5v
whats odd is that at the tcon i tested voltage across the fuse on the tcon and i get 0v
i figured main board issue..so i ordered a used main board....when i put replacement main board in i still have same issue
no 12v at the tcon fuse
i disconnect the panel ribbon cables to rule out any panel issues and i still have no 12v at the tcon fuse
the odds of having 2...
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Re: Power supply board missing voltage
There is no standby mode...
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Re: Power supply board missing voltage
The machine has 9hrs power on mode per usage meter
1hr spindle motor on
I just confirmed its a ps ossue...i hooked up 24v directly to main board and now servo motors function
I tried resoldering old ps...no change
Im going to just mount a cheap 24v ps next to orig...its cheapest easiest solition
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Re: Power supply board missing voltage
Thanks samsam...great info..later today i will examine ps closely and do some cleaning and resoldering
Since the board only has 1hour use on it im thinking this is not a component failure...hoping its just a corrosion solder joint problem
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Re: Power supply board missing voltage
Ok i may have found voltage required...see a link i found ...see cause3...it say 24v needed...ive got a 24v power supply i van feed to v2 wires over weekend to see if servos will then work for troubleshooting purpose.
[url]https://cdn.badcaps-static.com/pdfs/bcc944bf189adeb246e509f7f43741f1.pdf[/url]
And yes samsam..i will look at some of the solder joints pinsRe: Power supply board missing volta...v needed...iveLast edited by shelby5041; 09-18-2021, 03:58 AM.
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Re: Power supply board missing voltage
Hi samsam..thank you.for your good advice..you are correct thats very time consuming...the biggest issue is desoldering.
Im not an electronics guru...just a tinkerer...and for me desoldering lead free solder is a royal pain in the ass....i used to desolder lead solder with an old radio shack msnual bulb sucker and it did fine
That will not work on lead free solder and ive never had luck eith lead free solder
I do have a dedoldering station but have never used it...
Ill look at board over weekend.im...Last edited by shelby5041; 09-18-2021, 03:12 AM.
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Re: Power supply board missing voltage
I dont believe the 5v is standby...it powers the controller board and lcd display which is all fine
Ill do some more testing over weekend
This is a cnc machine not a tv
Controller board runs on 5v
The other voltage which is missing powers the x y z axis servo motorsLast edited by shelby5041; 09-17-2021, 07:42 PM.
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Re: Power supply board missing voltage
thanks..none are bulged and the power supply only has 1hr use on it so none of the components should be bad
just wondering if corrosion or high humidity affected any components from sitting in shed for many many years
the power supply is located on the bottom of the machine so its probably less than 3/4in from the ground..so its possible that when it was stored in was submersed in water at one time but thats just a guess
the machine is pretty rusted at the bottom about 1in highLast edited by shelby5041; 09-17-2021, 05:56 PM.
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Re: Power supply board missing voltage
i use isopropyl alchohol to clean it up best i could..and yes there are several corroded areas on the board...the board screw mounts just screw into plastic framing of the machine not metal.
im thinking its something simple since the machine only has a little over 1hr run time on it...its old but was never used..just left out to rust to all heck,,,im trying to save it...
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