Forum: Troubleshooting TVs and Video Sources
03-02-2021, 12:21 AM
|
Replies: 25
Views: 1,130
Re: No power on Vizio D32F-E1 TV
That test will only be applied to the power supply board that has pull-up resistors for the power supply control signal lines for self test purpose, your power supply board does not have pull-up...
|
Forum: General Electronics Technical Discussion
03-01-2021, 12:29 AM
|
Replies: 13
Views: 1,794
|
Forum: Troubleshooting TVs and Video Sources
02-28-2021, 01:30 AM
|
Replies: 8
Views: 289
|
Forum: Troubleshooting TVs and Video Sources
02-28-2021, 01:24 AM
|
Replies: 25
Views: 1,130
Re: No power on Vizio D32F-E1 TV
Please attach good clear pictures of the whole backside of the TV showing all the boards, and good clear straight shot of the whole power supply board so we can see what we are dealing with.
|
Forum: General Electronics Technical Discussion
02-27-2021, 12:02 AM
|
Replies: 13
Views: 1,794
|
Forum: Troubleshooting Computer Displays
02-25-2021, 10:54 PM
|
Replies: 16
Views: 2,260
Re: Need help hooking up LED back light strips.
Did you get any paper works that come with the LED driver board and the LED strip?
That LED driver board (constant current power supply) has the boost converter circuit that boost the 12VDC input to...
|
Forum: General Electronics Technical Discussion
02-23-2021, 05:01 PM
|
Replies: 7
Views: 312
|
Forum: Troubleshooting TVs and Video Sources
02-21-2021, 02:45 PM
|
Replies: 35
Views: 704
Re: sony kdl 40x 3500 no backlights
The 6.8 Ohm across the relay contact is for limiting inrush current when power is applies to the circuit, the relay is closed to bypass the resistor when TV is turned on.
|
Forum: Troubleshooting TVs and Video Sources
02-20-2021, 09:43 PM
|
Replies: 14
Views: 455
Re: Samsung UN55JU7500F
1) So if you run the power supply board by itself, does the PFC Boosted Voltage stay at 390VDC?
2) If all boards are connected. When TV is turned on, does the PSON stay at 4.5V or it jumps up and...
|
Forum: Troubleshooting TVs and Video Sources
02-20-2021, 09:39 PM
|
Replies: 17
Views: 395
|
Forum: Troubleshooting TVs and Video Sources
02-20-2021, 02:09 PM
|
Replies: 19
Views: 445
|
Forum: Troubleshooting TVs and Video Sources
02-17-2021, 09:02 PM
|
Replies: 42
Views: 563
|
Forum: Troubleshooting TVs and Video Sources
02-15-2021, 06:47 PM
|
Replies: 28
Views: 500
|
Forum: Troubleshooting TVs and Video Sources
02-15-2021, 05:39 PM
|
Replies: 28
Views: 500
Re: Samsung UN40NU7100FXZA....MELTDOWN!
3 years warrant on Parts & Labor?
If not they can charge you big labor that can be more than what the product is worth.
I doubt that they will stock new replacement LCD panel for 3 years.
|
Forum: Troubleshooting TVs and Video Sources
02-15-2021, 05:21 PM
|
Replies: 28
Views: 500
Re: Samsung UN40NU7100FXZA....MELTDOWN!
It means you can buy crap with longer warranty, instead of making good products so you know you do not have to worry about repairing them for a long time if you make it right in the first place....
|
Forum: Troubleshooting Game Consoles & Other Weird Devices
02-15-2021, 04:59 AM
|
Replies: 16
Views: 608
|
Forum: Troubleshooting TVs and Video Sources
02-15-2021, 12:41 AM
|
Replies: 28
Views: 500
|
Forum: Troubleshooting TVs and Video Sources
02-15-2021, 12:37 AM
|
Replies: 7
Views: 191
Re: Sharp LC-65N7004U LED type
At what current did you drive the LED at to get the Vf of 3.3V?
Vf of LED will vary with drive current. Your LED is probably single LED.
Here is example of LG INNOTEK dual LED, Vf of 6.3V is...
|
Forum: Troubleshooting TVs and Video Sources
02-11-2021, 04:49 PM
|
Replies: 32
Views: 1,050
|
Forum: General Electronics Technical Discussion
02-10-2021, 02:31 PM
|
Replies: 9
Views: 462
Re: Magneto-resistor Digital Output Potentiometer
I look at the schematic, the input of the circuit is for interfacing with the analog output of the sensor.
What is wrong with the old sensor?
Do you have high res or PDF of the schematic?
What is...
|
Forum: Troubleshooting TVs and Video Sources
02-10-2021, 02:08 PM
|
Replies: 34
Views: 673
|
Forum: Troubleshooting TVs and Video Sources
02-09-2021, 01:23 PM
|
Replies: 19
Views: 4,080
|
Forum: Troubleshooting TVs and Video Sources
02-09-2021, 12:56 PM
|
Replies: 6
Views: 191
|
Forum: Troubleshooting TVs and Video Sources
02-09-2021, 12:26 PM
|
Replies: 6
Views: 191
|