hitachi Repair Tips




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Results 930
MakeModel Ch.SymptomProblem SolutionSolutionBy:
HitachiG8Q
EEPROM keeps becoming corruptedDeguassing positor int arcing
HitachiG8Q
Display corruptCheck Q1502/3/4/5 - Q1505 was leaky BC548
HitachiG8Q
Diagonal bands of interference - esp in TxtC932 470µ 16v
HitachiG8Q
DEAD WITH LINE DRIVER TURNED FULLY ON AND LED NOTCHECK AROUND IC1502 ( SAA1293 ) FOR ACTIVITY if none replace X1501 crystal
HitachiG8Q
Dead with blackened mains fuseMelted PVC tape from degaussing coils touching audio amps heatsink
HitachiG8Q
Dead or int start up/offStart up therm TH902 o/c
HitachiG8Q
Dead- fuse blackenedCheck TH902 thermistor
HitachiG8Q
Dead apart from trippingTxt panel dis'd & trip stops - C933
HitachiG8Q
Dead apart from chan no.12v supply only 5v - C933 2200µ 25v
HitachiG8Q
Dead after smokingC715 in E-W cct dry joints
HitachiG8Q
Dead - went off with abangTH902, also check Q901, Q902, ZD901, ZD903, D905, D907, D908 IC901, C908 , R910 & check print
HitachiG8Q
Dead - no PSU operationD907 BYV10-40 s/c also check UC3844 & Q901/2
HitachiG8Q
Dead - no line driveTimebase chip TDA2579 faulty - no line drive o/p at pin 11
HitachiG8Q
Dead - intermittently.Drys on T901 , D933 or LOPTX.
HitachiG8Q
Dead - HT present - no line driveSt/by line from micro 3.5v (should be 8-12v on , 0v in st/by) D1504 1N4148 in st/by cct faulty
HitachiG8Q
Dead - fuse shatteredDegaussing therm, Q902 s/c, ZD901 27v zener s/c, D903 leaky, IC901 UC3844 chopper chip sus & ZD902
HitachiG8Q
Dead - fuse o/c.Change all transistors/diodes in PSU.
HitachiG8Q
Dead - fuse FS901 o/c.Drys T901 , check Q902 , ZD901 , OC941 , ZD941 , Q941/2 , D905
HitachiG8Q
dead - comes on eventually if on/off sw held involts across C908 gradually increases - TH902 thermistor hi res (approx 2M) remove & clean or replace (better)
HitachiG8Q
DeadRU2M 20v supply rect s/c & LA4270 audio o/p chip blown