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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionAddedDate
 
Found: 711
SharpSV2588HDead aft brief activity at sw onOveriding relay gave blank raster/no sound - D712 & D713 dry jointsplamensl14-09-2004
SharpSV2589For PSU problems.Resolder diodes attached to PSU heatsink.plamensl14-09-2004
SharpSV2589INT RED TINT IN TOP 2/3rds OF PICTUREC636 DRY CHECK DIODES ON HEATSINK ALSOplamensl14-09-2004
SharpSV2589Red tint at top of pic & slight vert jitterC636 330µ dy jointsplamensl14-09-2004
SharpSV287XHBlank raster/no sound - OSD present (RF & Scart)Switching [video and audio] is performed by IC401 [M51321P] a three gang three way device. pin 15 of the IC works on a tristate level. With the IC supply being 12V: 0 - 2.5V Input from BNC; 5 - 7V Input from scart ;9 - 12V Input from tuner. Diode D419 [DX00458M] which links to the wiper of the AGC preset was leaky, limiting the voltage on pin 15 to 7V and thus preventing tuner mode selection. Replace D419 with an IN4148 plamensl14-09-2004
SharpSV287XHSt/by only at sw on with burning smellR518 2R2 smokes due to fop chip IC501 LA7831 faulty - caused by C521 & 522 100µ 35v o/cplamensl14-09-2004
SharpVT-2198Bunable to reduce vol to min - OSD OKR1090 12k 0.25w on daughter pcbplamensl14-09-2004
SharpVT3700No sound/pic - tape stuck inR761 1R fusible o/c, Zener D757 15v s/c, L752 o/c & check ck caps in psuplamensl14-09-2004
SharpVT3700HOff tune on timer recsVT supply to tuner rises when tV in st/by - IC005 33v stab RH-IZ0249CEZZJplamensl14-09-2004
SharpVT3700HSt/by onlyL752 burnt up - replace all smis in the line concernedplamensl14-09-2004
SharpVT3700HWon't tune.IC1005 , R760 IC1005 Sharp RH-IX0249CEZZ R760 220ohm , Sharp VRG-RF2EB221Jplamensl14-09-2004
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