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Repair tips  

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

MakeModelProblemSolutionDate
Found: 15



Onwa1402Snow only - tuning but no storeThe -30v supply to IC601 pin 9 low. ZD601 30v zener leaky14-09-2004
OnwaCTVK9228Tuner drift then loss of sigsNo 33v at reg chip due to o/c print in centre of pcb due to black glue corrosion14-09-2004
OnwaK9228Dead - burn up in PSUIC901 STRS6309, IC902 TLP721, IC903 SE140, VR901 5k preset, Q902 2SA1015, R914 47R 1/16W, R915 82k 1/16w, R916 120R 1/4w, D907 RG2 s/c. Check HT at TP405 for 150v14-09-2004
OnwaK9228Dead - no line driveR306 10k or 5k6 5w14-09-2004
OnwaK9228Field collapseR422 o/c, Field chip TA8427K s/c14-09-2004
OnwaK9228St/by - has hum on sound in st/byQ904 2SD1015 & Q906 2SD804 in 27v supply14-09-2004
OnwaK9228St/by has a bright rasterQ903 2SA1013, Q902 2SD154514-09-2004
OnwaK9228St/by onlyQ903 2SA879-R s/c, R925 1k5 o/c & R960? 56R between Q903 coll & Q905 base14-09-2004
OnwaK9228St/by onlyNo clock osc - 8Mhz Xtal faulty14-09-2004
OnwaK9228Tripping psuQ402 BU508AF lop tr s/c, C417 4n7 1.6kv bulging14-09-2004
OnwaK9228Won't go into st/by (leaves blank raster)Q903 2SA879 HT sw tr (BF470 works)14-09-2004
OnwaK9715Int field scan - chip overheatsC402, 405, 409, 41414-09-2004
OnwaK9715Tuner driftC106 0µ47 tant14-09-2004
OnwavariousInt dead / fizzingCheck HT relay14-09-2004
OnwaVariousThe Onwa TV PSUSee TV Mag Feb 199814-09-2004
page: 1 
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