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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
HitachiNP84CQChannels - screen flashes red , green or blue.IC501 ( TDA3562A ) reduce R726 to 560R R610 to 8.2k.14-09-04
HitachiNP84CQDeadR710 OR R713 OC IN LINE DRIVER STAGE14-09-04

HitachiNP84CQDeadCHECK Q703 , Q702 , Q903 & LOPTY14-09-04
HitachiNP84CQdeadF901 1.6A fuse o/c - no other ff14-09-04
HitachiNP84CQDead - blown.Uprate fuse from 1.25a to 1.6amp.14-09-04
HitachiNP84CQdead - ht fuse o/cwhen replaced squeals if sw held in - whisker of wire on lopt pin s/c supply14-09-04
HitachiNP84CQDead - shows "1" in displayQ902 BU806; ZD901BZW03C36; Q1455 BC548B14-09-04
HitachiNP84CQdead - trips once at sw onHT high at 150v (100v); Q902 BU806 leaky; ZD901 BZW03C36 s/c14-09-04
HitachiNP84CQdead - whines onlyok on dummy load - Loptx Pt no 243414114-09-04
HitachiNP84CQDead StBy LED & channel indicators okCheck Q1455 ( BC548 )14-09-04
HitachiNP84CQDead.R710 ( 2.7k ) , R713 ( 2.2k ) ,14-09-04
HitachiNP84CQexcess ht & rollingR908 22k in error sensing network hi res14-09-04
HitachiNP84CQField bounce/rollC603 47µ 160v u/s14-09-04
HitachiNP84CQfield collapseC603 47µ 160v scan coupling cap14-09-04
HitachiNP84CQFrame - memory not storing.IC201 ( ZTK33B )14-09-04
HitachiNP84CQInt colTDA3565 dry joints14-09-04
HitachiNP84CQInt goes into st/by & Ch+/Ch- buttons on tv won't operate correctlyReprog micro as per instructions14-09-04
HitachiNP84CQInt st/by & chan change no'sNo 12v to remote pcb etc. R714 1R fusible in series with pin 2 loptx14-09-04
HitachiNP84CQNo colReplace TDA3565 & adj ref osc14-09-04
HitachiNP84CQNo colPin 11 IC501 low - C511 2µ2 50v brightness pot decoupler14-09-04
HitachiNP84CQNo colour - int.C507 ( 2.2u f ) , IC TDA3562A.14-09-04
HitachiNP84CQNo frame or sound.R714 ( 1R ) o/c.14-09-04

HitachiNP84CQNo sigs - just snowNo 12v to tuner - crack in print by R222 AGC control14-09-04
HitachiNP84CQNO SOUNDTDA450314-09-04
HitachiNP84CQPartial field collapseC603 47µ 150v in field o/p cct14-09-04
HitachiNP84CQStuck in standby.R908 22k HIGH14-09-04
HitachiNP84CQStuck in standby.1.6a fuse on L/H side main PCB.14-09-04
HitachiNP84CQThe picture would roll. EHT trip thyristor operatiR908 in the regulator circuit had risen in value from 22k .The fault could also occur with Models CPT1444 and CPT1446.14-09-04
HitachiNP84CQTop of the picture blanked outC905 o/c 100mfd 200v (next to tuner)14-09-04
HitachiNP84CQ/2Channel display no other functionsReplace Q90214-09-04
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