thetonywarren
Senior Member
Last Activity: Today, 10:51 AM
Joined: 02-21-2013
Location: Green Bay, Wi.
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With the LEDs disconnected, there is about 44vdc. When you press power, it spikes to about 70vdc, but then immediately drops back down to approx 44vdc. This happens the same when the LEDs are connected as well.... -
Try this video.
Thanks!...Leave a comment:
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Yes, understood, this is what happens when I plug that connector in and try to power on the set. See video link below.
[url]https://youtube.com/shorts/dtmpVzL3umw[/url]https://Yes, understood, this is wha...pVzL3umw[/url]Last edited by thetonywarren; Yesterday, 01:18 PM.Leave a comment:
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All diodes highlighted in red boxes checked out ok. I also tested the new led strip and it looks to be 114-115v when tested. Existing shows 114-115 as well....Leave a comment:
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When I tested the output to the LED strip, they were around 114V, that's for the ones installed in the set. I also checked the brand new set that I purchased as replacement, if needed. They were also around 114V.......I'll check the diode....Leave a comment:
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TCL 43S435 NO BACKLIGHT ISSUE, LEDS TEST OK
I have a TCL 43S435 with no backlights. I contacted ShopJimmy and they said power supply. I got replacement power supply, but still doesnt work. I have confirmed that there is an image with flashlight test. I have also verified that the led strips work when I probe them with LED tester. Any ideas would be helpful. I am also geting a double blink on the status led when trying to turn it on......Nothing on the power supply looks suspect, and caps look ok. Where should I start to test......Thanks!... -
What were you going to say after "in the end your screen"?...Leave a comment:
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We could try to test caps on the panel, but Im not sure how we can determine what their values should be. Im guessing we would need a different type of meter or tool to test those very small SMD caps....Leave a comment:
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Re: TCL 75R615 has sound, no backlight
The only pictures I have are the ones from post #3. Other than that, the TV has been working since the repair, use it every day pretty much.Leave a comment:
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Re: Samsung un32j5205af turns on, but needs to have power disconnected to power back
That's a great idea, I would agree, it doesnt seem like a hardware issue to me, do you have any instruction or help on how to flash/re-write the winbond flash?
Which IC would need to be re-written?Leave a comment:
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Samsung un32j5205af turns on, but needs to have power disconnected to power back on
SAMSUNG UN32J5205AF
Wierd issue. Set turns on, works as normal, then turn off, and when you try to turn back on, it wont. The backlight comes on, but doesnt boot up. You need to disconnect power supply from back, then reconnect it, and then the set works again. somewhat annoying issue.
Where to start? I can provide any videos or pictures needed to troubleshoot....... -
Samsung A21 SM-A215U WONT POWER ON
I have a relative that has a A21 that all of a sudden wouldnt power up, they brought it in to the cellular provider and was told they needed a new battery.
A new battery was installed but this did not correct the issue.
Currently new battery installed, but no signs of life when pressing power button, and also no signs of life if plugged into usb charger.
Where can I start to troubleshoot. Im pretty proficient with troubleshooting as well as soldering. Is anyone out there that can help me get this going... -
Re: Pioneer VSX-3300 Receiver Wont Power On
Any further insight after I posted what I have checked so far?Leave a comment:
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Samsung PN51E450 Plasma Vertical Lines
Friend of mine has a Samsung Plasma panel with some vertical lines that are starting to form on the screen.....Ive never worked on a plasma panel, so Im not sure what to look for, would this typically be a main board issue, or something else?
Any help would be appreciated.....Please let me know....... -
Re: Pioneer VSX-3300 Receiver Wont Power On
this is as far as I have gotten....See picture for details on good/bad components......im sure you guys can see some sort of pattern or where the source of the issue is/was??...Leave a comment:
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Re: Pioneer VSX-3300 Receiver Wont Power On
Ok, great, thanks, I ordered a resistor kit and will start replacing them.......Leave a comment:
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Re: Pioneer VSX-3300 Receiver Wont Power On
I think I answered my own question, but just looking for verification, I believe by this picture, measurement, and chart attached, that these should be 1/4W resistors.......Leave a comment:
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Re: Pioneer VSX-3300 Receiver Wont Power On
Looks like some of the resistors burned up, Im guessing that's where I let the magic smoke out.......In looking at the documentation, Im not seeing specifications for the required wattage, I think I read there that they should be 5%, but im not sure on wattage and how much that actually would matter.........any input?Leave a comment:
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Re: Pioneer VSX-3300 Receiver Wont Power On
Amazing, thanks for the help with that....
Also is it ok to test the transistors in circuit, vs out of circuit, I just want to be as thorough as possible with my troubleshooting, but dont want to take each one out if not needed.....
Thanks!Leave a comment:
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Re: Pioneer VSX-3300 Receiver Wont Power On
Ok, so I am tracing the circuit back and the next transistors for each channel, from what I can gather are Q509-Q512, I took those out of circuit and tested them, two of which are PNP, and the other two are NPN, I tested them and believe they test good....not shorted, and are showing with my DMM to be passing current correctly......do I stop there or should I keep tracing back to Q505-Q508, and then Q501-Q504? There's also Q515 and Q516 too......Thoughts?
On a different note, the 4 main transistors are from my research obsolete,...Leave a comment:
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