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
LCD SEMP TOSHIBALC 15/2010Z
The power supply does not startCheck on the PCI main stage of the power supply if the electrolytic capacitor c356 is altered or has unsoldered terminals.Capacitor/ c356xmichaelx
LCD SEMP TOSHIBALC 2010Z
The device turns on, the display lights up and then turns off spontaneously, activating the protection.C30/ c31/ c32, approximate voltage value across the capacitors, c30 15v/ c31 19v/ c32 19v.Check the inverter circuit, in the protection stage, if the capacitors are shorted; c30/ c31 /c32 / 100kpf. To turn off the protection, it short-circuits the collector and emitter of transistor q9, and damages whether the device works normally.xmichaelx
LCD SEMP TOSHIBALC 15/2010Z
Display without video (all white screen) and normal audio.Shameless/D40/Saah0/SaatsWhen they noticed on LCD televisions models LC 15/2010z, display system without video, completely white screen and normal audio, located on the main PCI a/d. check: u27/d40/c370/c369, detected most frequently (d40) with leak. if the u27 regulator voltage was below 9vdc: completely white LCD screen.xmichaelx
SEMPTV2091
U14		TV with squeaky power supplyFlaybackReplace the flybackxmichaelx
SEMP2071M
NãO TENHO		TV only has light on the screen. There is no sound or image.I've worked with TV repairs, but it's been more than 15 years. This TV is mine, I don't have a schematic for it.jose de matos
SEMP TOSHIBATV 14 OU 2091
U14R		When turning on the TV, the LED lights up for approximately 5 seconds and then turns off. After this procedure once, it no longer lights up, only after a few minutes. I tested and replaced all c3209, fly back, power supply capacitors, no solution.I only solved the problem by replacing the stv9302 vertical output. obs. "I used tda9302 and it worked perfectly."Carlos Guerra
SEMP TOSHIBATV-2084
Image with ripple and escaping synchronizationC404 - 0.47uf brokenReplace it even after measuring ok!stiltec
SEMP20A82EAV
U8		Vertical closed at the bottom with retrace linesC301 1mf/50vReplace to solvehaecio
SEMPTV2959IFS
TV doesn't turn onWhen you turn on the TV, +b appears and then disappears, measuring d885 you observe a small voltage spike, which disappears then, but this voltage spike does not appear after r 885, so r885 is open...Replace the r885 resistor, "obs" the resistor is 0.33 r, I put it at 1r and it's cutting high....Ricardo Alves / Eletrônica do Ricardo / Caeté MG
SEMPTV 1450
U18		Vertical closed or closes intermittentYa 430 is zener eat intermittentTo replaceAlvaro (prolar)
SEMP2090 E OUTRAS
Sem osdChange the memory icMaster Eletronica
SEMP TOSHIBA2090
AUV14		Turns on normally after two minutes, turns off and turns on again, then stops and keeps chirping horizontallyCi 801 with faultsThe c i tv was replacedeuripedes
SEMPTV 1491
U14		Does not turn on, stays on standbyDoes not start horizontallyCapacitor c887juares
SEMP TOSHIBALEM5
Naõ sai do stand-byVertical ci shorted and r327 opencarlinhos100
SEMP TOSHIBAU9
Image folding at the topFaulty vertical ci.carlinhos100
SEMPTV1452
It doesn't work and the LED keeps flashing and the power supply only has 55V10k 865 capacitor shortedReplace for a good one.Ademir solânea pb
SEMP TOSHIBATV 1234-B
Off-white screen with shrink line across the entire tubeC 329 with interrupted pinI replaced it and that's it, I got this tip right here on the forum, thanks friendsDIGITEC ELETRONICA
SEMP TOSHIBAU9
Vertical closedC 305 sold outcarlinhos100
SEMPTV2051
U19		TV with filament on, but tube offD885 open 8817Diode replace d885 is connected to pin 12 of the chop transformermarcos melo cascavel ce
SEMPTV 2040
Works on 220v but does not work on 110v, the image is framed in the centerPower supplyReplace of capacitors c818 and c824.LOU