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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: 10
Bush2714Dead with 2.5A mains fuse blownTr801 BU508A s/c, R801 2R2 5w o/c, R809 270k o/c, IC801 TDA4601 & therm TH802 CHS pt no 12001GT14-09-04
Bush2714Stuck in st/byR603 3k9 5w HT feed to LOP o/c14-09-04

Bush2714Stuck in StBy - Psu okR603 3k9 5W oc ( line driver feed )14-09-04
FergusonTX90 37140Corrugated vertsC189 22µ 50v between LOPTx & chan sel14-09-04
HitachiC1714TPic size decreases with brightnessHT low - CNX82A opto coupler IC901 s/c pri14-09-04
HitachiC1714TSt/by onlyDis supply to fop chip to check if this is cause - if then ok apart from field collapse, check fop chip TA8427k & D70214-09-04
HitachiC1714T etcField o/p chip repeatedly failsReplace ic 601. get two 33v Zener diodes and connect them in series ( BZX79C33V) connect the anode to pin 1 of ic601 cathode to pin 2 of ic 601. Fit 10nF 50v capacitor across the frame scan plug E701 on print side of the plug. If the ic still blows after this mod. a new CRT is required. The tube is flashing over. This applies to all sizes of 14T/TE range of sets14-09-04
HitachiC1714TE (A15 chassis)No Txt & delay in returning to st/byCheck 5v supply pin 44 micro - if low ZD4001 5v1 zener is sus14-09-04
HitachiC1714TE (A15 chassis)To acess service menupress the following buttons on the remote: 4 4 STATUS MUTE TV in that order and fairly quickly. The service menu is displayed. Check that BYTE 1 = 7D; BYTE 2 = 20 These are two hex digits - to exit menu press st/by14-09-04
Nokia7142 Euromono 2Flyback lines after fitting Konig FAT 30091 LOPTx1) adjust H sync 2) fit 1nF 5C40 3) remove 5C17 (12pF) & fit 22K res in 5C17's place14-09-04
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