TC-L42U30B TV Repair: Common Faults and Solutions.
Search: TC-L42U30B
Results: 24
Results: 24
TC-L42U30B Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| PANASONIC | TC-L42U30B | It turns on, the picture appears and goes off, it does this 3 times and then the standby LED flashes once at each interval | Activating protection. In the power supply board connector that goes to the main one, on the power supply side, remove the wire from pin 12 and ground | Eletrônica Barbato | |
| PANASONIC | TC-L42U30B KM11 | The backlight lamps flash and activate protection, the standby LED starts flashing 1x | Cold welding on the power supply transformer position T800. | rafaelmoraes99 | |
| PANASONIC | TC-L42U30B | Sometimes it turns on, and turns off completely out of nowsound, sometimes tsound is no sign of life. | Overprotection circuit being activated erroneously | Zener d7207 on the run, the voltage to activate the protection on the cathode must exceed 6.8v (zener voltage), but feeding with an external power supply, caused the base of the transistor that is connected to the anode of the diode to trigger with 5 volts. | Davi.sls |
| PANASONIC | TC-L42U30B | Normal turns on 3 to 5 minutes... power supply switching... heating up the ic803 a lot | Dz804 de 18volts na base do q817 | I replaced the ic803 and it stopped heating up and switching the power supply (dz804 leaky zener) | Alextecnico |
| PANASONIC | TC-L42U30B | Dead, nothing turns on, not even stand-by | Several leaky diodes. no voltage. only 5v. | Given the various problems, the best solution was to replace the power supply. | SilvioSantosCTV |
| PANASONIC | TC-L42U30B | TV turns on, with image, but soon distorts causing horizontal bands, black and white stripes across the entire screen, turning off. | Main board defect, short smd capacitor, on ic5000 on pin14 smd capacitor 1uf leak or short, board does not have silkscreen. | RNSPTEC | |
| PANASONIC | TC-L42U30B | TV turns on and after a few minutes turns off by itself | Cold solder on d836 - rectif diode. (bridge) 800 v 6.0 a (correction of the diode code indicated in the previous one) | Redone the solders on d836 (b0fbat000017) - rectif diode. (bridge) 800 v 6.0 a | Luiz Cunha |
| PANASONIC | TC-L42U30B | TV turns on with back light off | Tpc8124 burned | Replace it or make a jumper on the jsp812 and go for the hug | UTITECH |
| PANASONIC | TC-L42U30B | 24v and 12v voltage oscillating | On the power supply board, replace transistor ic803 or q817, whichever of the two is defective shows the same symptom. | EC | |
| PANASONIC | TC-L42U30B | The LED blinks indicating a backlight failure | The ants made a nest in the connectors and the TV protected it and wouldn't stay on | Opening the display and cleaning it solved the problem. | antonio nobrega patos pb |
| PANASONIC | TC-L42U30B | Flashing red LED 14x | Tpc8116 mosf failure | Remove the tpc8116 mosfet and connect the 3 power pins | BETO ELETRÔNICA ACRELANDIA AC |
| PANASONIC | TC-L42U30B | Led flashes 14 times 15v low voltage with 5v customer 88178817 | R901 amended | Trade for a 36k | MARCOS MELO |
| PANASONIC | TC-L42U30B | Doesn't start. red LED flashes 14 times low power supply defect. it is giving 5 v on the 15v line pins 456 power supply cable | Doing a test on the IC 803 circuit I found a 30.1k resistor r901 changed, I put a 36k one and replaced it with 17 volts customer 88178817 | Replacing the r901 resistor with a 36k one click 88178817 | marcos melo ce |
| PANASONIC | TC-L42U30B | TV turns on and after approximately 30 minutes it turns off | Transistor q817 was measuring 2.5v at the base and 10v at the emitter and collector | Power supply diode d840 with leakage | ADRIANO |
| PANASONIC | TC-L42U30B | TV doesn't turn on when it's completely turned off, 5 volts stay at 2 volts when I turn it off, the keyboard returns to 5 volts | Causes capacitor 5477 to be shorted, it goes from pins 1 to 5 of the ci 5416 dc regulator I replaced the TV it worked | Francisco Edno Amaral Simoes | |
| PANASONIC | TC-L42U30B KM11 | TV won't turn on without stand-by | Double diode d806 with leakage. | The diode with minimal leakage but sμFficient to activate the ovp protection circuit. | eletrofepar |
| PANASONIC | TC-L42U30B | No image lamps light up | 12v was missing on the tcom | Ceramic smd short main board without position number but next to tcom a15 flat connector | iran alves dos santos |
| PANASONIC | TC-L42U30B | The LED flashes 14 times and does not turn on | Fuse pa850 smd (on the power supply board next to the connector that goes to the main board) capacitor c8780 | Eliminate the capacitor (it is on the main board, next to the connector that goes to the display tsound are 4 capacitors, one of them) | Eletronicaaeb |
| PANASONIC | TC-L42U30B | No image, backlight access. | Smd capacitors in parallel to the main flat for t-con | Replace leaking capacitors | I.G |
| PANASONIC | TC-L42U30B | It doesn't turn on, it just keeps the stamdby LED flashing green several times | Smd capacitor under the tcon board in short you can take it out tsound are two, a bigger one it kills the 12v voltage you can test the 5ah smd fuse it is on the tcom board next to the flat sludge | eEletronica Arni-sc |