Sorry guys, I rushed a little bit too fast. It was the bridge rectifier afterall... I missed checking between + and 2nd leg. So problem solved.
Still thanks for the answers
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
17PW15-8 blows fuses after lightning
Hello,
I picked this PSU 17PW15-8 from a friend's TV with a burnt fuse, after some days of rain and lightning strikes. The TV was on standby when it happened.
With new fuses it burns them as well. I checked bridge rectifier, all the TO220 components, diodes and basic caps, replaced IC806 SMPS, and FETS driving the big transformer. I also isolated the secondary circuit by cutting the rails of the FETs to the primary coils. I don't know even know if that makes sense, but I did in hopes to isolate the problem.
Any ideas what to look for?...Last edited by Sraros; 12-04-2023, 01:41 AM.
-
Re: Dell U2413 turning off
2years later one more monitor U2413F with the same issue.
Only this time the monitor only had standby voltage straight from the power on state instead of shutting down after a while.
These spare BT169D came in handy
Leave a comment:
-
Re: dynabook Satellite Pro c50-h-W10 power issue
Not to underestimate any of you but as I am left with split advice, I am a little in doubt here.
Is it safe afterall to inject a 1V power into that rail?
Are these readings I posted enough to say there’s a short to ground or is it normal?
Leave a comment:
-
Re: dynabook Satellite Pro c50-h-W10 power issue
Positive or negative started with 1 Ohm and after checking over some more, dropped to 0,6 OhmLast edited by Sraros; 05-30-2023, 01:11 AM.
Leave a comment:
-
dynabook Satellite Pro c50-h-W10 power issue
Hello,
I have this laptop that is not charging at all.
Removing the MB I first noticed the PET film insulator at the back is thermal shrinked seemingly coming from the battery circuit and heavily distorted behind the 2nd DC-in mosfet Q25 (MDV3604).
The battery itself is drained to 0, with one cell being a little bulgy. I guess the battery died and the circuit tried to push amperes in it?
Anyway with a 19.5V adapter (not original) hooked I have 19V on drain of the 2nd DC-in mosfet.
I have a short to ground on inductor L9, TC17, TC16 and several...Last edited by Sraros; 05-29-2023, 04:57 PM.
-
Re: Philips 43PFS5803
Update on this. The repair kit did it's job. TV works again.
IC U9101 was indeed shorted (compared grounds to new one)
Q9101: K8A65D1 shorted
The SMD resistors passing through blown.
All the 0 resistors ok. Fuse and caps ok
Leave a comment:
-
Re: Philips 43PFS5803
No for sure not, maybe it's another version of the original board to cut down the cost. The repair kit has the same Mosfet I removed and not the one in schematic...
Leave a comment:
-
Re: Philips 43PFS5803
I found a repair kit that includes IC U9101, mosfet, blue film capacitor and the resistors (even though R9104 is not included but already replaced) so I will change them all.
Better safe than sorry, specially when my only other option is to buy separately and wait 2 months from China..
It seems this can be a common problem in this board since there’s a specific repair kit for it.
I will come back in 15 days when they arrive.
Leave a comment:
-
Re: Philips 43PFS5803
Correction R9104 not R9142.
Also R9106 and R9103 are also burnt reading over 10kΩ
IC U9101 seems ok
Leave a comment:
-
Philips 43PFS5803
Hello,
I received this 43' TV. It has no standby voltage and the owner had it on when it banged and shut off.
With a quick look I found one resistor burnt on top side
R9101 0.24Ω
and at the back smd resistor R9142 22Ω
Both were reading with MM in MΩ
The schematic is attached to this post.
I investigated nearby components and found N-Mosfet Q9101 is K8A65D1 instead of STF24NM65N as per schematic. The resistance between drain and source is 4.4Ω. Should I consider it shorted and the culprit of the failure or is this normal?...
-
Re: AOC Q3279VWF, distorded image
With both original T-Con and replacement it does the same thing.
Its funny that the image is “somehow correct”, it just doesnt interpolate right.
It's like every odd number of pixel columns is displayed correctly and every even number of pixel columns is moved like a clone of the display.
In the link there's a video I took of how it shows stuff on screen.
[url]https://we.tl/t-FRJEmqvbxp[/url]Re: AOC Q3279VWF, distorded image<br...e thing.<br />
Leave a comment:
-
Re: Philips 65PUS6554/12 one time backlight flash
That’s great! Sth triggered the overvoltage/undervoltage protection for the LEDs inverter.
I hope it was sth trivial that got fixed by disconnecting and draining completely the caps, and it remains at working condition.
However have a go on different cases. Let the TV operate for a while to warm up and standby-turn on again or power off-on.
Somebody more experienced maybe can explain why this happened.
Leave a comment:
-
Re: Philips 65PUS6554/12 one time backlight flash
Did you disassemble already the panel? I assume it’s same TV I see the leds at the background.
If yes, then you can start by visual check and without a multimeter testing voltages method your leds.
The way I do it is record a slow motion video the leds of the panel.
If the LEDs are the problem, when you connect to power and the leds flash briefly, you will see which ones didn’t flash and there’s your problem. Suggested fix is to replace all the LED strips. LEDs going bad is an indicator they...
Leave a comment:
-
Re: Samsung LE37B650T2W, white picture
No only once I changed it.. I tried a couple of times fixing panel boards but I never managed to bring to life one and always remain with the doubt if the panel itself has a damage or the board...
Leave a comment:
-
Re: Samsung LE37B650T2W, white picture
Yes changed the IC but nothing changed.
I kept the boards and threw away the rest TV after seeing your posts. So thank you all but TV is gone...
Leave a comment:
No activity results to display
Show More
Leave a comment: