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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: 58
AmstradCTV3012Int line - line drive low in fault conditionR601 4k7 hi res (12k)14-09-04
Beko30128TDead - LOPTr blown & twitching/flashing when replacedR149 Surface mounted resistor should be 1K5, was up to 41K 14-09-04

Beko30128TDead & tickingBU508DF LOPTr s/c, C140 22n 630v o/c14-09-04
Beko30128TLop tr goes s/cC140 22n 400v o/c14-09-04
BekoNR30128TDeadLOPTx commonly goes faulty - SEME LOPTX35228P & R118 10k 1/2w burns out14-09-04
FidelityCTV3014FDead - chopper tr BUZ91A s/c & 2A fuse o/cR4 270k o/c, TDA4605-3 replaced (use correct type)14-09-04
GrundigCUC5301Child lock removalHold in vol + vol - prog - prog + when inputting the pin no14-09-04
GrundigCUC5301Dead - fuse blown.Chopper tran T644 s/c , D681 ( BYV38 ) leaky.14-09-04
GrundigCUC5301DEAD FUSE BLOWN CHOPPER SCD681 SC14-09-04
GrundigCUC5301Field CollapseD401 12v zener s/c and hi ht due to 2 x 47µ caps14-09-04
GrundigCUC5301Int pic - sound okdry joints T568 tr heatsink - mech stressed14-09-04
GrundigCUC5301no r/c4 pin rec u/s - replace with 3 pin version14-09-04
GrundigCUC5301OSD dim & outline only - ok when no sigs presentIC2541 TDA3566 col dec chip u/s14-09-04
GrundigCUC5301R/C inop - no response from IR RxReplace IR unit TFMS4300 4 leg type, with TFMS5360 3 leg type not all 3 leg type will do 14-09-04
GrundigCUC7301Blown psu caused by R661 220R going hi resalso replaced IC630 UC3842, T665 MJFS8004, D663 3v6 Zener14-09-04
GrundigCUC7301DeadDry joint C669 blows T665 & IC63014-09-04
GrundigCUC7301DeadC669 1000pf dry joints & burnt; MJF18004 T665 s/c; ZD663 had 25R reverse resistance, D624/621 1N4007 mains rects s/c & UC3842AN faulty14-09-04
GrundigCUC7301Dead - Chopper T665 blown plus -IC630, D633 3v6 zener, D662 BA157, bridge rects D621-4 1N4007, R661 220R, R663 18R, 3 x sm diodes under psu sect, dry joints C66914-09-04
GrundigCUC7301Dead - lop tr s/c & replacement ran hotCT169 BC858B buffer sm leaky14-09-04
GrundigCUC7301Dead - R542 10k or 13k o/cWhen replaced overheated again - crack in print by lopt14-09-04
GrundigCUC7301Field lin poor, width reduced & HT only 100vR666 & 667 in psu 0R82 had risen to 1R5 (values depend on crt size)14-09-04
GrundigCUC7301Low sound & no set up menuIn hotel mode - to exit - hold down "i" button at sw on14-09-04

GrundigCUC7301low sound -stuck in hotel modehold 'i' button whilst switching tv on. Use rc arrows to select hotel mode then off14-09-04
GrundigCUC7301off chopper tr s/c c-bT665 MJE18004C, D664, 666 1N4003, CD654,CD656 LS4148, IC630 UC3842A, D663 6.3v zener, R661 220R replaced & dry joint C66914-09-04
GrundigCUC7301off with a bangC669 1000pf had dry joints causing burn up of pcb. Following parts replaced :- 2.5A fuse, IC638 uC3842AN, T665 chopper tr MJF18004C, D662 BA157 s/c, D663 ZPD3.6 3.6v zener s/c, R663 18R, R661 220R hi res, R669 5w14-09-04
GrundigCUC7301Pic goes bright & may tripCT181 BC858B & CT186 BC848B sm on main pcb14-09-04
GrundigCUC7301Pic pulled across to rightCT169 BC858B sm leaky14-09-04
GrundigCUC7301Poor regulation of psusm diodes cd 654 and cd656 leaky. They are type LS4148 but standard 1N4148 ,s work ok.14-09-04
GrundigCUC7301PSU rebuildCheck mains smoother C626 47µ 385v or PSU may need rebuilding again14-09-04
GrundigCUC7301Reduced width and line tearing when TV gets hot.Replace surface mount transistor CT169 BC858B14-09-04
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