Re: Hisense rsag7.820.5687 no power no standby light
Tv is actual functioning. I will give it a try and Show what happens. If it fails again i will do more testing and repair attempt. So far thanks to everyone who helped me
EUWest
Member
Last Activity: 04-18-2023, 09:32 AM
Joined: 05-15-2019
Location: Cologne
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Re: Hisense rsag7.820.5687 no power no standby light
Replacement psu doesnt buzz. So its specific to this psu. But however Replacement psu isnt workingLeave a comment:
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Re: Hisense rsag7.820.5687 no power no standby light
Uploaded and marked resoldered Pins.
Turning on off switch doesnt fix buzzing sound...Leave a comment:
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Re: Hisense rsag7.820.5687 no power no standby light
Resoldering some joints fixed it. But there is still a loud buzzing sound while tv starts.
And even if its turned off, there is a buzzing sound too.
What can it be?Leave a comment:
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Re: Hisense rsag7.820.5687 no power no standby light
Thanks for this hind. Will give it a try tomorrow and Also test voltages on spare psu which i boughtLeave a comment:
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Re: Hisense rsag7.820.5687 no power no standby light
But back original psu and get this voltages
19.6
19.6
0
0
12.15
12.15
0
0.004
0
0
Standby at 0.004 way to low. There is a buzzing sound on psu. Does this correlate with standby voltage?
Values are same connected or not with Mainboard....Leave a comment:
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Re: Hisense rsag7.820.5687 no power no standby light
Hell no, switch was turned off while i was testing.
Now i have standby light but it wont turn onLeave a comment:
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Hisense rsag7.820.5687 no power no standby light
Hi!
I have a power supply and on the TV no standby and no power. Have already installed a replacement power supply but the same problem.
When I test both power supplies the main capacitors while plugged in, I get 0v.
What could be the reason for this?... -
Hisense H49M3000 PSU buzzing + Black screen after 20min
Hey Folks just got another Hisense with an unusual Problem.
After plugging in its starts buzzing on the cold side. Could not located it 100%, but seems like transformer/capacitor.
TV has 1 horizontal Line, often static. After 10min screen gets flickering and after about 20min screen gets Black while Sound is on. After turning off and on screen appears back for about 5min and then went Black again.
I checked LED Voltage:
While Screen is on about 115v
While Screen is Black also about 115v
LED Connection unplugged also 115v
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Re: How find interchangeable Components?
Thanks for this advice!! I read everytime datasheets but on diodes i tought it has to be an exact Match. Didnt know that going Bigger in voltage and amp rating is possible. So now im knowing this and it helps me a little bit more to find interchangeable components. Thanks for this!!!Leave a comment:
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Re: How find interchangeable Components?
Will remember! Have found an solide mbr20100ctf TO220-3 from donorboard, will give it a try on sundayLeave a comment:
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Re: How find interchangeable Components?
Didnt know that i can interchange 10a 80v schottky diode with 20a 100v. I think i have some in Stock, will Look later. Thanks!!!
I know Mouser.de allready, but for 2 pcs are shippingcosts about 15$ too much. Will first Look at my storageLeave a comment:
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How find interchangeable Components?
Hi Mates!
Im Looking for an Option to find interchangeable Components.
Actually im seaching for an alternative to MBRF1080CTL but nearly every month im on the search for Alternatives, because Here in Germany i often not getting Parts fast and for a good price. Nearly every Part is coming from China which Tales too long or US which has Shippingcosts about 15$.
Hope to get some impacts! -
Re: Hisense 50k680 no power no standby
Hey dick_barton! Thanks for your reply. I think i killed the Board while replacing R906. Think Used to much heat and than Board wäre inflated at this Area.
Saw on Aliexpress Replacement Boards, im willing to order one and hope its solve the Problem.Leave a comment:
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Re: Dell U2414HB doesnt turn on
On Q801 (18T10AGH Mosfet) i get 14,7 V on Drain, Gate and Source getting 0 V. Could Mosfet faulty?Leave a comment:
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Re: Hisense 50k680 no power no standby
Just replaced NCP1271 but nothing changed. What else can it be?Leave a comment:
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Re: Dell U2414HB doesnt turn on
No one any idea?Leave a comment:
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Dell U2414HB doesnt turn on
Hi Mates,
My Monitor wont turn on anymore. Just hit Google an saw that Dell U2414HB is known for faulty capacitiv Touch Button.
After this i opened it an first checked the Buttonsbut cant Tell if its faulty.
Also i checked Power Supply an get on the Black cables 0V, on the Red ones 15V and get on White 0V and Orange 0V.
Black should be Ground, Red Positiv. But what could Orange and White be? Maybe standby?
Had anyone hit an Dell U2414HB also?... -
Re: Hisense 50k680 no power no standby
Which ic should i order? Are in schematic is NCP1271D65R2G Listed, on PS its 1271A PSAG.
Online i found 1271D100R2G, should this okay?
R906 has now 280 k ohm, have to Replace it tooLeave a comment:
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Re: Hisense 50k680 no power no standby
Weile testing R906 Burned so i dont now if my results are right or not.
I get on
Pin 1 (Skip/latch) : 0.34V
Pin 2 (FB): 0.34V
Pin 3 (CS): 0V
Pin 4 (Ground)
Pin 5 (DRV): 0.01V
Pin 6 (Vcc): 15.7V
Pin 8 (HV): 265V
Could this be correct?Leave a comment:
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