Semp TV Repair: Common Faults and Solutions.

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Semp Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem	Solution	By
SEMP	LC3246WDA	TV works for a while and turns off, leaving the green LED on and won't turn on again	At the power supply in the primary, check the zener diodes zdw901-- 16v and the diode dw905 --1n4148 with leakage	The dw905 1n4148 was replaced and resolved	Eletrônica Ômega
SEMP	DL4844AF	TV turns on and off the LEDs, green STBY light	I changed r766, inserted r776(4k7), removed 1r0 from each isense, it kept turning off.	Test LED bars with an external power supply, the good ones light up at 25vdc, each one, the bad ones above 35vdc (do not use them)	jjsantosneto
SEMP	L39S3900FS	Does not light LED bars	Shorted capacitor on line +b pin 2 of ci ocp8121 burns r804 10r		AGNALDO
SEMP	32RV700(A)	Turns on relay gun standby LED turns on and off and TV doesn't turn on. power supply with voltages, everything is normal.	Main board does not light up the signal indicator LED.	I replaced the main board and the TV started working normally again.	George Pontes
SEMP TOSHIBA	2134(C)SL	Turns on normally then turns off. turns it on again, turns it off sometimes until it stays on	Q706 transistor s8050 (with leakage it heats up)	Q606 transistor s8050 (with leakage it heats up)	Fernando Nascimento
SEMP	2934 SK91	Burning exit h	C 307 7n6 open		EletroFenix
SEMP	TV 2134 (C) SL	Arming the relay and disarming it by entering protection	2.2k resistor changed to 27k	(r604) close to the photo coupler	Eletrônica Basstos
SEMP	LC3246AWDA 9209	After turning on the power button, the TV turns on normally but turns off the lights in 3 seconds	Changed lamps	Solution: remove d705 and d706, leave without, and go for the hug	Eletronilo
SEMP	LC3246AWDA 9209	After turning on the power button, the TV turns on normally but turns off the lights in 3 seconds	Changed lamps	Solution: remove d705 and d706, leave without, and go for the hug	Eletronilo
SEMP	2134 (C)SL SK11	This TV turned on normally after a few minutes, the image was duplicated with several scratches on the screen and it also made a strange noise next to the flyback	L302 detail so you know if this coil is really bad, just put a magnetized screwdriver if it normalizes, just change it and run for the hug		Eletrônica Lima pb
SEMP TOSHIBA	40L2400	TV turns on normally after a while and turns off.	Altered 3.3 regulator.	Swap n805	Eletrônica Ideal
SEMP	2934 SK91	Connects with the weak image as if it were the image tube. I changed the tube but it wasn't the image tube!	L301	Replace the l301 790μH coil without measuring and just run for a hug!	Sinailson furtado
SEMP	2934 SK91	Connects with the weak image as if it were the image tube. I changed the tube but it wasn't the image tube!	L301	Replace the l301 coil without measuring and just run for a hug!	Sinailson furtado
SEMP	TV2134 SK11	Sound goes back and forth, increases and decreases	C636	C636 exhausted by another is good again	Marqueis eltec eletrônico
SEMP TOSHIBA	DL3254(A)W	Back light on, but no image	Capacitor incurto	Replace cp17	Eletrônica Ideal
SEMP TOSHIBA	LC4055FDA	LED turns on and off, when it heats up it works.	Cb904		<small>electronicssupplyparts</small> Gramado/RS
SEMP	TV2159 OFS U18	Does not turn on, with 56v on the secondary power supply	Replace zener diode d862 and d863, both 20v.		DJ PITUKA
SEMP	1452 U19	Turns on and in a few minutes turns off by itself	Cold solder on the main board and crt board.	Redo all the cold soldering, especially in the 5v supply regulators sector and in the cables that go from the main PCI board to the tube PCI.	2200uf/16v
SEMP TOSHIBA	TV1484FAV U11	Vertical closed	Replace without measuring c305 and c306		jr_TEC
SEMP TOSHIBA	40L2400	When I connected the plug to the electrical network, the standbay LED would light up and go out quickly.	An LED bar with a shorted LED	I replaced the LED and the function