Re: Clayton 19" LCD TV - Dead PSU
With the meter probes directly to the pins 2 & 4 of the transformer (TR801) i get 0v AC.
With the meter probes directly to the pins 2 & 4 of the transformer (TR801) i get 0v AC.
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Re: Clayton 19" LCD TV - Dead PSU
What dc voltage do you have across C812, the large capacitor. One meter lead on each of the two pins.Willing to help but I'm no expert.Comment
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Re: Clayton 19" LCD TV - Dead PSU
Across C812 (68uF 400v electrolytic capacitor) i have 318v DC.Comment
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Re: Clayton 19" LCD TV - Dead PSU
I must admit I'm lost at this point and can only suggest that you take another look at the components you have changed and ensure you have put them in the correct way.Willing to help but I'm no expert.Comment
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Re: Clayton 19" LCD TV - Dead PSU
Diah From what was said to me, the tv hit the ground while on, well by the way some of the tracks of the IC800 were ripped off, something did hit the heatsink of this components and when the pins touched each other caused the S/C, the problem will be to know which component to choose since some of the components don't match the schematic. i'll have to try and see what happens...
dick_barton I'll do that and try to place a diode on D following what Diah suggested.
Another thing i don't understand why there is a blue capacitor (marked 101 1kv) in the D807 place, by the schematic there should be a diode BA159.
Thank you both! =)Comment
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Hi all,
As the title suggests, how can I be sure that my EC chip is really dead?
I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.
Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard... -
hello guys,
i need help to repair a edm-033 ps2
history : as always hdmi port and usb ports destroyed after unplugged
after change them, ps5 dead too : 1 beep, no blue light. after inspection 1.8v power was shorted, and because of dead panasonic chip. after remove it : no short anymore
so i changed it
now i have got 5v stby,, 3.3v stby, 3.3v power, 1.8v power and no short on them
but the ps5 is dead again : 1 beep, near 10 seconds with power lines and then off, no blue light ...
i don't see any projection of liquid metal on pcb.
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Hello everyone hope all doing well!
I have this PSU (GPS450-AA delta oem) around for like 4-5 years and I had it recapped early 2020 or 2021 with mostly UCC KY and Nichicon PW's. The bulk was and still is fine, the original Ltec's were bloated and empty. The previous issue was some major coil whine noise and at times random shutdowns when going idle. Today it started tripping the mains breaker and I think I have dead APFC mosfets (20N60C3). Right now upon checking I have the Q1 and Q3 FETs dead so far and I guess those are responsible for the PFC circuit. The only thing I care is If there... -
Hi guys!
I searched for the term "dead short" in the forum but no specific thread came up however if I'm just blind and couldn't see the thread talking about this please forward me to that direction.
So my problem is I don't know how to find the source of a dead shorted voltage rail. Dead short = ~0 ohm resistance.
I have two VGAs (HD 4850 and HD 4870), both dead shorted to ground on the memory rail. I have the boardview file for the 4870 and the memory rail consists around ~7892346 capacitors...
I have a bench PSU and if I try to inject voltage the voltage... -
Hello, today I'm working on this lovely MSI Raider GE75 gaming laptop which I bought to flip. Unfortunately, I believe the CPU is toast but I wanted a second opinion before I chucked it into my spare parts bin. I will not have most tools with me today as I'm away from my workbench but I have the basics (a good multimeter, a horrible iron, a solid screwdriver, and my trusty thermal cam). I do not have the original 230w charger, but I have a Dell 180w which was sold with the device and reportedly "worked fine for them".
Specs: I7-10750H, RTX 2060, 32GB RAM (unknown manufacturer)...
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