Search: UN40F6400
Results: 15
Results: 15
UN40F6400 Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| SAMSUNG |
UN40F6400
|
Flashes standby and hits the relay repeating the process... power supply arm the LEDs normally when isolated from the main. | Mosfet smd channel n 035n40 screen printing qm854 shorted pcb power | The MOSFET was replaced using compatible SMD D4185 taken from various scrap Samsung power supplys. resolved. Note: this TV goes into protection by hitting the relay due to different types of problems, it is good to evaluate it carefully! att, | |
| SAMSUNG |
UN40F6400AG
BN44-00622 |
Dead tv. does not turn on stand-by LED | Tsound was no voltage coming to the main capacitor. relay at current input with broken terminals (relay lying on the board next to the varistor) | I couldn't find another to replace it, so I scraped off the broken terminals and soldered them back in place. | George Luís |
| SAMSUNG |
UN40F6400
|
TV turns on and off | Turn off protection, jamper 801 and measure voltage on the bus mosfets. tsound are 4, one pair is controlled by a ci slc 2013 and the other 2 mosfets by another slcc 2013. the mosfets are inoperative, replace the ci that controls them. | 2013 ci slc replace | Pronto Socorro do Lcd |
| SAMSUNG |
UN40F6400
|
Standby LED flashing, TV does not start. no image, backlight does not light up. | The problem appears to be the main board, if you disconnect the TCON TV it will work normally again. | Tcon replace | TREK |
| SAMSUNG |
UN40F6400
|
Customer said he used air to clean, probably resulting in cold welds | I resoldered the entire power supply board, I replaced the 2 capacitors next to the 390uf/25v power supply output, I placed 2 of 1000uf/25v | After all this I still needed to inject 13v into the power supply output after that the TV turned on and tsound were no more problems | Petrukio |
| SAMSUNG |
UN40F6400AG
|
Burning the LEDs reduces the current | Https://youtu.be/pse_p5w0say | Follow the steps in the video that never burns again https://youtu.be/pse_p5w0say | Eliel Batista |
| SAMSUNG |
UN40F6400
|
Turning on only the power supply with the LEDs, the LEDs keep blinking, as if turning off and on, hitting the relay | R802 smd changed, resistor value is 10r | ||
| SAMSUNG |
UN40F6400
|
Knocks relay and flashes LEDs | Check 15v resistor rs802 | Check rs802 - smd 10r, close to ics801c. at the entrance tsound must be approx. 15v. After that it drops approx 0.3v. If not, check regulator qs801, if voltage is coming in, check zds803. pass: zenner-diode-regulator-resistor-jumper | dsolucoes |
| SAMSUNG |
UN40F6400
|
It turns on, sometimes it works all day, sometimes it turns on, turns off the back light, the sound continues. | See in the power supply that 9801, 9802 (npn(k7k) smd transistor. I used (1fw)). | Replace said transistors. | arock |
| SAMSUNG |
UN40F6400AG
|
Backlight burned out and power supply went into protection by hitting the relay | At the power supply, ic9101, qq853, q9801 and rs802 were changed | Ic9101 caused the board to go into protection and transistors qq853 and q9801 did not conduct. RS802 is a common problem with this TV, but in my case I had to replace more components | rikadapper |
| SAMSUNG |
UN40F6400
|
The relay hits but it doesn't turn on, the stand by relay keeps flashing (if you turn off the main board, the LEDs light up. | Power supply primary ci ics801 position loose | Solve ci. | Eletronicaaeb |
| SAMSUNG |
UN40F6400
|
Doesn't start | The relay was knocking and it wouldn't turn on, I checked that the voltage on the rectifier bridge was very low, I took all the bridge measurements with a digital multimeter on a diode scale and everything was normal, I decided to change the rectifier bridge anyway and to my surprise the problem has been resolved. | cdias | |
| SAMSUNG |
UN40F6400AGXZD
|
Sometimes the backlight turns on and then turns off, giving the impression that it is the LEDs. | The defect was in transistor q9801 on the power supply board | I just replace it with another one, in my case I put a bc848 and it was great | Luiz videotek |
| SAMSUNG |
UN40F6400
|
Sometimes it turns on and works, sometimes it doesn't turn on, the LED flashes 2 times quickly and the power supply relay keeps hitting, but it doesn't light up the screen or work, it stays in this cycle indefinitely. | I tested the power supply, I tested the LEDs, I tested the main board and I tested the tcon, I forgot about the joystick/bluetooth/wifi module. | The defect was in the bluetooth module, just changing it solved it... | MIGUELTV |
| SAMSUNG |
UN40F6400
|
Knocking relay and unstable LED display | R802=10r changed | R802 smd I put common 2 wts. the leds the cap 22mf I put 47mf and I resoldered the invert stage everything was fine! good luck!!! | Jhone eletronica |