alfatv
Badcaps Veteran
Last Activity: 07-10-2024, 07:42 PM
Joined: 09-14-2020
Location: Guelph
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Your panel is 47" so 49" strips will not fit. Yours looks like LB or LF series, don't you know the model number of your TV? -
Re: Samsung TU8000, backlight and sound on, stuck in blue screen
PanelLeave a comment:
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Re: Samsung UN75RU8000FXZA bad main board?
Most likely panel is badLeave a comment:
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Re: philips 55pfl5907/f7 flashes and goes black
Does your LED tester have current adjustment? The difference may be more significant at higher current around 100mALeave a comment:
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Re: LG 55UH7650-UA needs a capacitor!
Yes. The damage would be short circuit between 2nd and 3rd pin....Leave a comment:
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Re: LG 55UH7650-UA needs a capacitor!
1kV is voltage rating, most likely you need that type, but you also need capacitance, somewhere around 220-470pF. Take a look at blue cap in 1st picture, very likely it's the same type. Also check both transistors mounted on a heatsink.Leave a comment:
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Re: Sony Bravia 65x900F BL On but not picture
When you say half screen, was it sharp divide or gradual transition?
Please remove cover from t-con, that would be the next thing to try.Leave a comment:
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Re: Help identifing a component on LG main board
The component is ferrite bead, 120 Ohms is impedance at 100MHz.
Inductor is not a substitute for this type.Leave a comment:
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Re: Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea
Very little chance it will work.Leave a comment:
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Re: Samsung UE55NU7026K always restart
For now LOL...Leave a comment:
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Re: Level shifter circuit schematic project request for Samsung TV, please!
I did some search for you.
I couldn't find an IC that does it all, your supply voltage is pretty high.
You need mosfet gate driver, low side.
I found these parts: UC1707/2707/3707 and MIC5020. IXYS may have some too.
Connect ground of IC to -6V and VCC to +30V.
Then you need level shifter for input, so that logic low is -6V.
I hope you can figure it out.
Make sure you don't exceed absolute max voltages for the pins of IC.Leave a comment:
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Re: Conponent replacement hisense tv
Google search points to PMST3904, thats NPN transistor.
You can check it multimeter.
There is the same type next to it, you can check it too to confirm it's NPN.Leave a comment:
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Re: Level shifter circuit schematic project request for Samsung TV, please!
Is this just 2 levels?
Do you know how fast is the clock?
Is it driving large capacitance?Leave a comment:
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Re: Can these speakers be repaired?
Turn off the volume, then
- Check if it's still running hot
- Measure DC voltage across the speakersLeave a comment:
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Re: Marantz PM-66SE Burns Transistors
OK, but +24V and -18V are not the only voltages. +/-38V are used for the amp.Leave a comment:
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Re: Marantz PM-66SE Burns Transistors
Check C-E of Q801, Q802, they are probably shorted.
Then check the voltages from attached screenshot.
+24V and -18V must be there otherwise something else is wrong with those regulators....Last edited by alfatv; 03-05-2023, 07:44 PM.Leave a comment:
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Re: Vizio M65-C1 | Logo appears for 10 seconds then off
Yes, the internet is full of experts.
There are already proven reflow profiles developed by industry.
[url]https://en.wikipedia.org/wiki/Reflow_soldering[/url]
That's reason you need thermometer and the clock is also not hard to find.Re: Vizio M65-C1 | Logo appears for ...oldering[/url]...Leave a comment:
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Re: Led Help Samsung
Why don't you raise a dispute on aliexpress? You should be able to get a refund or replacement.Leave a comment:
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Re: Samsung QE50Q50TUA power cycling.
Looks like another TU.
Why do you need to remove the panel?Leave a comment:
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Re: Denon 3313CI Distorted Audio FL+FR
If you have a scope, you check how distorted signal looks and follow through the signal chain.Leave a comment:
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