meter readings on transistors and diodes is a voltage drop ( .5v ) across 2 terminals forward biased but reversed biased is OL. (open line or open loop = no current flow)
Thanks for the great video, repaired my first TV dumpster diving Haier 32" Tft LCD tv receiver five bad caps, learned from your videos keep them going.
wow dude,,,, you are awesome !!!!!!!!!!!!!! you are the smartest guy i know.... most of this info is over my head ,,, but i will learn it ,,, thanks for your time to make us beginners somewhat smarter,
thanks for your response to my comment , that makes me feel good that some one as smart as you will take the time to share their knowledge in a way that is understandable and useful . I am trying to teach myself appliance repair as i am retired Navy and i am interested in this to keep my brain active and also i just like to learn new stuff,, all of this circuit board stuff blows my mind but i keep studying and hopefully it will come together in my head. anyway sir,,, keep up the great work and "knowledge is power"
I'm new, and having much the same problem. My LG50PA5500 TV has been working flawlessly since new. The other day, while in the midst of watching a broadcast DTV channel, the entire screen suddenly and silently went dark; sound, channel selection and inputs all work OK. I have checked connections and voltages from: stdby, pwr supply board fuses, psb output voltages to Zsus board and its fuse, output voltages from Zsus to Ysus and its fuses. All precisely normal !! I've also checked voltages to the other control boards, etc. No indications of cap problems, though they will need to be tested with tester in tomorrow's mail. Also a transistor tester coming. The ONLY slight indication of anything amiss, is a (what I would call!!) light "toasting" (no pun, sorry) about 1.5" in irregular diameter towards the center from the copper coil of the Ysus board. I almost "feel" that that would be consistent with fair wear and tear of 9 years use, but of course, heat is the eternal enemy of electronics. I have very closely examined both X and Y boards, front and back for any damage indications. I have not yet touched the Y buffer boards. If that is the next step, what is it that I should check and the sequence to follow???? I'm kind of at a standstill, and need some direction before I start swapping out boards left and right. Any help would be greatly appreciated. Thanx
Thanks for the tips... I watched another video you had about replacing a capacitor due to blinking red light on a Samsung tv. I tried updating the firmware and when it restarted I have audio, but no video.
Greeting from Malaysia. Many, many thanks for video, very informative. I was a technician in a TV assembly factory(the CRT TV). I will be most appreciative if you can do a video on the use of oscilloscope on sound and video waveform. Troubleshooting with the help of a oscilloscope.thanks again
What's up tampatec. Listen my vizio 40 inch smart TV. I was using but I never turned it off it stayed on 24/7. So the other day it just didnt turn on after a flicker of the power from a passing thunderstorm. Now I opened it up and one if the capacitor is bubbled up on top , it turns on but turns off after a few. Then doesnt turn on I'm getting the 5volts on the stand by and 12 volts wher its suppose to be ,now should I change the capacitor or just just replace the board ?:
hi there great channel keep going. I have a tv LG 49 inches, I have sound but no screen(I can see that the backlight opens but no picture). I have two problems I think in the power supply. One diode of many in the circuit gives me OL. in both sides unless I remove it from the board or remove a small smd resistor next to it. Also at the output I have a 10 pin connector to give power to everything the output on some pins is 13.3 volts (there is a small board indicator) but measuring the real voltage is around 8 volts. So where I should check next ? thank you
The first thing to check is your main voltage rails which are printed on your power supply and if they are quite low remove another board it is feeding and if it normal voltage returns you may have a short
How do you use the ESR with those huge clips it comes with when testing in circuit? Those things are to big. When is use the leads from my MM is will not Zero.
i wanna know more about testing components in situ.? on board. Im sure i have had diodes that have measured short when testing on board, but out of pcb they tested ok. Im not a pro so i do get mixed up sometimes. Them sckotty diodes have caught me out before as i thought they were normal rectifiers
If they are reading short in circuit but fine out of circuit you have a low resistance path elsewhere so on the ohms range check for low ohms around that area
Hey @TampaTec ! I have a Samsung UN55MU6500FXZA with audio and no picture. There is NO t-con board! I've replaced both main board and power board and still get no picture. The tv will turn on and off when power is applied. When I disconnect one ribbon cable, the backlight stays on, tv seems to be functioning (sound from menu), but still no picture. Same deal with the other ribbon. If both cables are plugged in, the tv power cycles. Since I've already replaced the main board, I feel like I'm stuck with a bad panel. Is there anything left to test?
I have a part number (567nd ms 191 ms-15 2117haa) but unfamiliar with the name of this component, It looks like a black square with one prong on each corner. any help with ID-ing part would be great, and even locating a replacement. I believe its faulty as its one that left a giant burnt mark on the inside of tv. tv also made a loud pop as picture went out. thanks in advance
Hey Paul, thanks for your Awsome and informative videos. Been learning my basics from lots of your "how to" clips. So I have an issue which I'm hoping u can assist with. My kido been throwing around my LG MR600 Magic Remote and now no longer works. Where do I start to check it. So batteries have been replaced, opened it up and can't really see any physical damage to the board. It just has no power, like power button no longer lights up. PLZZZZZZZ HELP! Replacement cost is out of budget currently so forced to use the somewhat impractical android app on my phone. Thanks again. Zahir
Hi I have a ps4 slim and out of no where it keeps a saying to many usb devices ConnectED and it will not let me connect my controller to it or when I plug the controller to the game it starts charging then it stops please help
Here is an idea. Show how to remove and replace one of those miniature bios chips on newer generation motherboards (PC). I tried to flash one and the flashing didn't work. The motherboard was then dead. So I tried to R&R the bios chip. What a mess.
I would not rely on the capacitance reading as it could read the correct value and still be faulty The best way to check capacitors is to use an ESR meter .equivalent series resistance
it's 0.5 Volts. When you measure a diode junction on DIODE test mode it "drops" 0.5v (ish) when you flow current through it. So the meter is showing you the voltage drop in Volts.
.5 cats 🐈 jk I mentioned this in subtitles but I probably revise and reupload this video if it confuses anyone. To clarify .5v is voltage drop between anode and cathode forward biased but .05 volt drop is bad.
meter readings on transistors and diodes is a voltage drop ( .5v ) across 2 terminals forward biased but reversed biased is OL. (open line or open loop = no current flow)
@TampaTec I discovered your channel today and have already watched several videos. Haven't seen any stereo videos yet. Do you repair AVR's???
Thanks for the great video, repaired my first TV dumpster diving Haier 32" Tft LCD tv receiver five bad caps, learned from your videos keep them going.
congrats fixing your tv.
I love this kind of hardcore electronic stuff. It's what distinguishes your channel from a lot others. Keep it up!
wow dude,,,, you are awesome !!!!!!!!!!!!!! you are the smartest guy i know.... most of this info is over my head ,,, but i will learn it ,,, thanks for your time to make us beginners somewhat smarter,
thanks for your response to my comment , that makes me feel good that some one as smart as you will take the time to share their knowledge in a way that is understandable and useful . I am trying to teach myself appliance repair as i am retired Navy and i am interested in this to keep my brain active and also i just like to learn new stuff,, all of this circuit board stuff blows my mind but i keep studying and hopefully it will come together in my head. anyway sir,,, keep up the great work and "knowledge is power"
Fantastic. Crystal clear explanations.
I'm new, and having much the same problem. My LG50PA5500 TV has been working flawlessly since new. The other day, while in the midst of watching a broadcast DTV channel, the entire screen suddenly and silently went dark; sound, channel selection and inputs all work OK. I have checked connections and voltages from: stdby, pwr supply board fuses, psb output voltages to Zsus board and its fuse, output voltages from Zsus to Ysus and its fuses. All precisely normal !! I've also checked voltages to the other control boards, etc.
No indications of cap problems, though they will need to be tested with tester in tomorrow's mail. Also a transistor tester coming.
The ONLY slight indication of anything amiss, is a (what I would call!!) light "toasting" (no pun, sorry) about 1.5" in irregular diameter towards the center from the copper coil of the Ysus board. I almost "feel" that that would be consistent with fair wear and tear of 9 years use, but of course, heat is the eternal enemy of electronics. I have very closely examined both X and Y boards, front and back for any damage indications.
I have not yet touched the Y buffer boards. If that is the next step, what is it that I should check and the sequence to follow????
I'm kind of at a standstill, and need some direction before I start swapping out boards left and right. Any help would be greatly appreciated. Thanx
great vid. lots of helpful stuff in there. thank you.
@TampaTec I discovered your channel today and have already watched several videos. Haven't seen any stereo videos yet. Do you repair AVR's???
Thanks for the tips...
I watched another video you had about replacing a capacitor due to blinking red light on a Samsung tv.
I tried updating the firmware and when it restarted I have audio, but no video.
Samsung's are known for bad capacitors as often see them bulging .
lg ,,,,,has only red power light on but no pi or sound ,,,what to chk procedure or video on these??THX sir for yr videos!!!
Would you normally get a electric shock slightly from touching the top of the capacitors when the tvs power is on ?
Greeting from Malaysia. Many, many thanks for video, very informative. I was a technician in a TV assembly factory(the CRT TV). I will be most appreciative if you can do a video on the use of oscilloscope on sound and video waveform. Troubleshooting with the help of a oscilloscope.thanks again
great videos man learning a lot from your knowledge...im trying to fix a Toshiba where can i get schematics?
What's up tampatec. Listen my vizio 40 inch smart TV. I was using but I never turned it off it stayed on 24/7.
So the other day it just didnt turn on after a flicker of the power from a passing thunderstorm. Now I opened it up and one if the capacitor is bubbled up on top , it turns on but turns off after a few. Then doesnt turn on I'm getting the 5volts on the stand by and 12 volts wher its suppose to be ,now should I change the capacitor or just just replace the board ?:
Change the capacitor if its bulging also check the DC voltage on the cap itself after replacement could be anything up to 400v
Useful video. I liked it
Great video, Thanks
Where you got your parts?
Thanks.
whats the name of the soldering iron u just used
hi there great channel keep going. I have a tv LG 49 inches, I have sound but no screen(I can see that the backlight opens but no picture). I have two problems I think in the power supply. One diode of many in the circuit gives me OL. in both sides unless I remove it from the board or remove a small smd resistor next to it. Also at the output I have a 10 pin connector to give power to everything the output on some pins is 13.3 volts (there is a small board indicator) but measuring the real voltage is around 8 volts. So where I should check next ?
thank you
The first thing to check is your main voltage rails which are printed on your power supply and if they are quite low remove another board it is feeding and if it normal voltage returns you may have a short
How do you use the ESR with those huge clips it comes with when testing in circuit? Those things are to big. When is use the leads from my MM is will not Zero.
i wanna know more about testing components in situ.? on board. Im sure i have had diodes that have measured short when testing on board, but out of pcb they tested ok. Im not a pro so i do get mixed up sometimes. Them sckotty diodes have caught me out before as i thought they were normal rectifiers
If they are reading short in circuit but fine out of circuit you have a low resistance path elsewhere so on the ohms range check for low ohms around that area
Hey @TampaTec ! I have a Samsung UN55MU6500FXZA with audio and no picture. There is NO t-con board! I've replaced both main board and power board and still get no picture. The tv will turn on and off when power is applied. When I disconnect one ribbon cable, the backlight stays on, tv seems to be functioning (sound from menu), but still no picture. Same deal with the other ribbon. If both cables are plugged in, the tv power cycles. Since I've already replaced the main board, I feel like I'm stuck with a bad panel. Is there anything left to test?
Love your video tutorials
I like this kinda content video I would like to see more👍
Nice info. 👍
I have a part number (567nd ms 191 ms-15 2117haa) but unfamiliar with the name of this component, It looks like a black square with one prong on each corner. any help with ID-ing part would be great, and even locating a replacement. I believe its faulty as its one that left a giant burnt mark on the inside of tv.
tv also made a loud pop as picture went out.
thanks in advance
Halo. How are you doing . I have a question how much is this Fluke and is it still available on the market or not
About $100. link is in the video description.
Hey Paul, thanks for your Awsome and informative videos. Been learning my basics from lots of your "how to" clips. So I have an issue which I'm hoping u can assist with. My kido been throwing around my LG MR600 Magic Remote and now no longer works. Where do I start to check it. So batteries have been replaced, opened it up and can't really see any physical damage to the board. It just has no power, like power button no longer lights up. PLZZZZZZZ HELP! Replacement cost is out of budget currently so forced to use the somewhat impractical android app on my phone. Thanks again. Zahir
Good video buddy
nice component packs
Hi I have a ps4 slim and out of no where it keeps a saying to many usb devices ConnectED and it will not let me connect my controller to it or when I plug the controller to the game it starts charging then it stops please help
Here is an idea. Show how to remove and replace one of those miniature bios chips on newer generation motherboards (PC). I tried to flash one and the flashing didn't work. The motherboard was then dead. So I tried to R&R the bios chip. What a mess.
I would not rely on the capacitance reading as it could read the correct value and still be faulty The best way to check capacitors is to use an ESR meter .equivalent series resistance
This looks very similar to another video you did a few years ago.
I took few clips from few years ago to show real world troubleshooting.
COOL
Great video! But Jesus Christ the beeping constantly Way overpowers your voice and other sounds
Units mater!!
Point five, WHAT??
Dogs, cats, liters, amps, volts, ohms??
it's 0.5 Volts. When you measure a diode junction on DIODE test mode it "drops" 0.5v (ish) when you flow current through it. So the meter is showing you the voltage drop in Volts.
.5 cats 🐈 jk
I mentioned this in subtitles but I probably revise and reupload this video if it confuses anyone. To clarify .5v is voltage drop between anode and cathode forward biased but .05 volt drop is bad.
That was so educative.. Wish could get a watsapp number sir
whats the name of the soldering iron u just used