HITACHI Repair Tips

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MakeModelCh:SymptomProblem SolutionSolutionBy:
HitachiNP81CQField bounce esp on chan change & hi contrastC601 220µ 50v u/s
HitachiNP81CQDead.R905 ( 56R 3w ) o/c , R906 ( 82R 2w ) o/c.
HitachiNP81CQdeadMains fuse o/c; pin 6 chopper tfmr burnt, STK411, Q901 2SD787; R904 82K hi res, D901 2v7 zener s/c, D902 33v zener o/c, lop tr s/c, TDA1035S sound chip u/s
HitachiNP81CQDark pic 1st Anode low 200VC714 ( 0.068uF ) 1KV o/c
HitachiNP81CQBright white screenCheck V at K2 on CRT base if low replace C715 ( 4.7uF )
HitachiNP81CQBright pic on lh sideC715 4µ 250v - HT smoother to rgb o/p stages
HitachiNP81CQBlanking fault.C715 ( 4.7u f 250v )
HitachiNP81TB700 P.SUPP TRANSISTORS S.C. RB713 o/cREPLACE ALONG WITH C712 C726 94.7uF )
HitachiNP81POOR FIELD LINC614 2u2 TANTALUM
HitachiNP81NO PICTURE , POWER SUPPLY SCREAMING , LINE TEARING AC906 O.C. 220mfd , 400v
HitachiNP81Frame - bounce on ch change or picture changeC610 ( 220u f 50v )
HitachiNP80FIELD COLLAPSED601 ON PIN 9 IC701 S/C
HitachiNP6CSync - Line frequency varies.TR702.
HitachiNP6CStartup - no startup.R733 o/c.C910 startup con.
HitachiNP6CStartup - int startup.Poor connections to module CP901.