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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: 901
HitachiC28300,C2576TN etc A5 chassisRed pic with fb linesR829 fusible on crt base o/c (not shown on cct diag)14-09-2004
HitachiC28300TN A5Long time for pic to appear & white bands acrossC954 1000µ 35v in 12.6v supply14-09-2004
HitachiC2842N 11AK19PPDead - D823 blown (not shown on cct)When replaced still faulty, IC802 MC44604P chopper chip u/s - also check FET chopper Tr14-09-2004
HitachiC2846Field collapseIC601 (TA8427K) + 26v rail supply R710 (2R0 safety)14-09-2004
HitachiC2846TNField - lines at top of picTA8427K field chip14-09-2004
HitachiC2846TNField collapseR710 2R in FOP supply o/c14-09-2004
HitachiC2846TNField collapseTA 8427K and 2R0 safety res14-09-2004
HitachiC2846TNModel no displayed (factory mode)Press both rec buttons on hset, sw to st/by & then sw off at mains. Wait 30secs b4 sw back on.14-09-2004
HitachiC2846TNMODEL OF TV DISPLAYED ON SCREENPRESS BOTH RECORD BUTTONS ON REMOTE SWITCH TO STANDBY THEN SWITCH OFF AT SET WAIT 30SECS THEN SWITCH BACK ON14-09-2004
HitachiC2846TNNo soundEEPROM corrupt due to dry joints on regs - replacement pt no E73004514-09-2004
HitachiC2846TNNo sound - ok thro scartEEPROM faulty14-09-2004
HitachiC2846TNNo sound (AV sound ok)IC002 24C04 memory chip14-09-2004
HitachiC2846TNNo Sound via off air or scartReplace IC002 24C04 (Programmed with correct file)14-09-2004
HitachiC2846TNRemoving Code “C46TN” from screenTV in factory set up mode - Using RCU, press two VCR REC buttons together. The MENU will appear, then switch to standby. Turn appliance back on and prompt should have disappeared.14-09-2004
HitachiC2846TNShuts down int for first half hourDry joints esp at R719/R71814-09-2004
HitachiC2846TNSt/by onlyIC952 dry joints14-09-2004
HitachiC2846TNSt/by onlyHT high at 160v (should be 150v) R950 68k risen to 80k14-09-2004
HitachiC2846TNTripping with HT peaking at 170vOK when dummy load touched onto HT rail with HT correct at 150v; R951 8k2 in opto cct hi res14-09-2004
HitachiC2846TN A4Raster still present in st/byD4470 1N4531 leaky (RHS of the heatsink audio IC4450), working diode must have 28V at one end and 3.5V at the other end.14-09-2004
HitachiC2846TN A4St/by only or int goes to st/byDry joints R957 (near Q950 heatsink) & check drys on IC951, 952 etc14-09-2004
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