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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
HitachiG8QNo OSDR008 470k o/c or dry jointed14-09-04
HitachiG8QNo raster - field collapseCheck pin 9 IC601 if low (should be 9v) check R715 1R for o/c14-09-04

HitachiG8QNO SOUNDD701 ( 1N4148 ) , TDA2579.14-09-04
HitachiG8QNo soundD701 1N4148 & TDA2579 timebase chip14-09-04
HitachiG8QNO SOUND INT GOES TO STBYIC1501 MICRO u/s.14-09-04
HitachiG8QNO SOUND OP STAGE OKD401 IN IF CAN OC14-09-04
HitachiG8QNO SOUND PICTURE GOES WHITEIC952 12v REG US14-09-04
HitachiG8QNo sound/pic - blank raster when A1 increasedDry joint connection to sleeved wire that links 8v supply to IC001 5v reg14-09-04
HitachiG8QNo sound/pic - psu working okNo 12v supply as reg was u/s14-09-04
HitachiG8QNo start up - st/by onlyR903 82k o/c14-09-04
HitachiG8QNo startup - sounds like faulty BU.C85 s/c.14-09-04
HitachiG8QNo syncQ2110 BC548B on txt panel14-09-04
HitachiG8QNo textCheck programming14-09-04
HitachiG8QNo text - VERY weak text in mix + poor osdTDA3562A us14-09-04
HitachiG8QNo tuningR1534 39k hi res14-09-04
HitachiG8QoffNo volts pin 7 IC901 TH902 o/c & ZD901 s/c14-09-04
HitachiG8Qoff - ht presentno line drive - IC701 pin 10 only 4v (12v) C933 2200µ also C932 470µ 16v & C934 220µ 16v14-09-04
HitachiG8QOutline & shimmersIC201 in IF panel14-09-04
HitachiG8QPic goes red & green aft 20 minsTDA3562 col dec chip14-09-04
HitachiG8QPic obliterated by lines until heatedC720 4µ7 250v14-09-04
HitachiG8QPicture blanks out when using VCR pic SearchRemove Q1507 & fit 2 x IN4148 1st between R1520 & Emitter Q1507 2nd between R1521 & emitter Q1507 Cathodes to emitter14-09-04
HitachiG8QPOOR CONTRASTCHANGE R10 FROM 1Kohm TO 10Kohm14-09-04

HitachiG8QPower supply shutting down.Q941.14-09-04
HitachiG8Qpsu blownreplace D906 1N4148, D907 BYV10, IC901 UC3844, Q901 SGSP222, Q902 SGSIF344, R910 0R5 7W, TH902, ZD902 ZTE2S1, ZD901 BZX79C & check mains bridge rect and small electrolytics14-09-04
HitachiG8QRepeated failure of FOP chip TDA3654dry joint scan coil tag & replace cap pin 6 of chip - 47 or 100µ14-09-04
HitachiG8QSevere tuning driftR1501 high / oc 100k or may be 22k14-09-04
HitachiG8QSlow start up with tearingC933 2200µ 25v in 12v supply o/c 14-09-04
HitachiG8QSt/by onlyIt is normal for front controls not to bring set out of st/by - check hset is working! 14-09-04
HitachiG8QStartup - slow start up.TH902 should read 4k when cold.14-09-04
HitachiG8QStuck in AV modeIC501 micro14-09-04
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