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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
HitachiG7PInt start upC912 4n7 across TDA4600 faulty14-09-04
HitachiG7PNicam poor with clickingAdj coil L5 on panel between Txt & Nicam boards14-09-04

HitachiG7PNo line sync - pic displaced to rightNo line pulses IC701 pin12 - R726 2R2 o/c (also check R605)14-09-04
HitachiG7PNO MEMORY STORECHECK R173 , R174 , R72314-09-04
HitachiG7PNO PIC JUST SNOW , NO CONTROLS OR REM WORKIC601 FIELD CHIP AN5521 ( CHECK FOR FIELD PULSES AT PIN 15 OF IC101 )14-09-04
HitachiG7PNO TUNINGR138 ( 10k ) OC.14-09-04
HitachiG7PNo Txt - P100 onlyC2109 820pf14-09-04
HitachiG7PSet dead H.T. high & trippingZD903 & R909 ( 39K )14-09-04
HitachiG7PSet dead many semis in PSU s/CReplace Q903 Q904 : R909 R912 R902 R903 R760 R761 R762 R766 R901 : ZD903 Check Q781 & D782 Replace 2.2ohm across Q76014-09-04
HitachiG7PSometimes starts then cuts out after few minsR919 , R920 ( 100k ) feed to TDA4601 gone high.14-09-04
HitachiG7PSt/by only after trying to starts/c across 27v rail as IC601 TA8427K is s/c14-09-04
HitachiG7PTxt missingXtal X2231 in txt cct14-09-04
HitachiG7PWon't store chansD706 & R723 in lop stage dry jointed or faulty14-09-04
HitachiG7P Mk2Blank white raster.C711 dry jointed by LOPTX.14-09-04
HitachiG7P Mk2buzz on sound - flat picvid det coil L20214-09-04
HitachiG7P Mk2DeadTDA4601 chopper chip - also replace C914/5/6/714-09-04
HitachiG7P Mk2Dead - HT highX ray prot operating due to R716 51k res dry jointed14-09-04
HitachiG7P Mk2Dead R901 3R9 7w surge lim res o/cC919 4n71kv leaky & check C928 2n2 2kv14-09-04
HitachiG7P Mk2Dead with only 33v HT at LOPtrC909 150µ 400v mains smoothing cap o/c14-09-04
HitachiG7P Mk2Field bounce or st/by onlyIC703 MC7809 9v reg dry jointed or faulty14-09-04
HitachiG7P Mk2FOP chip has short lifeCheck HT is not too high - if so U know what to do!14-09-04
HitachiG7P Mk2Goes off aft half an hourDry joints C711 47µ 200v14-09-04

HitachiG7P Mk2Green raster with flyback linesR808 22k ?w o/c14-09-04
HitachiG7P Mk2grey raster with fb linesC711 47µ 200v bulging & faulty by LOPTx14-09-04
HitachiG7P Mk2int pic size/htC906 4µ7 250v14-09-04
HitachiG7P Mk2Mass of lines at centre of screenComes/goes with board flex - C702 dry joints - near IC701 FOP chip14-09-04
HitachiG7P Mk2NO GOR920 100k OC14-09-04
HitachiG7P Mk2no sound or pic - ht okfield collapse. No 9v to field chip as MC7809 IC703 o/c14-09-04
HitachiG7P Mk2No start upC911 82pf across pins 2 & 3 TDA4601 psu chip14-09-04
HitachiG7P Mk2no tuningR044 12k 0.5w o/c ZD002 30v tuning volts diode o/c14-09-04
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