hitachi Repair Tips




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MakeModel Ch.SymptomProblem SolutionSolutionBy:
HitachiNP82CQ
Int loss of sound.Looks like dry joints check lead out wires on TX.
HitachiNP82CQ
Frame - rolling when hot.C609 ( 0.22u f ) if not check components off pin 1 of TDA
HitachiNP82CQ
FIELD FOLDOVER & FLYBACK LINESR614 HIGH 150k
HitachiNP82CQ
Dead.Drys on D950.
HitachiNP82CQ
deadSTR6020 s/c; 2Afuse o/c; Lop tr 2SD898B Q781 s/c
HitachiNP82CQ
deadPri HT - no 11v HT - to overide overvolts trip s/c C912 & sub lop tr with bulb. - HT now 130v (correct on dummy load). Replace STR6020 and now ok
HitachiNP82
Standby - stuck on standby - no functions.IC901 ( STR441 ) on main chassis.
HitachiNP81CQ Mk2
Flyback lines at topC715 4µ7 250v
HitachiNP81CQ Mk2
Field lin - cramped at topC608 22µ 160v
HitachiNP81CQ
Whistling - from power supply.DJs on C912 , R905/6.
HitachiNP81CQ
Thin white line travels up screendry joints M601 field o/p device
HitachiNP81CQ
Sync - lack of frame & line sync.R723 ( 22k ) o/c.
HitachiNP81CQ
Startup - no startup.DJ on pin 4 of T901.
HitachiNP81CQ
Squeal from chopper Tx at switch on.C909 ( 220u f 160v ) , Dry R702 , C912 , R905 , R906
HitachiNP81CQ
Splutteringdry joints loptx earth pin
HitachiNP81CQ
Small faint raster.C909 ( 220u f 160v )
HitachiNP81CQ
No/Int loss of colour.L506 ( P No 2160831 )
HitachiNP81CQ
Int frame collapse.Drys R607.
HitachiNP81CQ
Int colourdelay gate pulse coil L506 faulty
HitachiNP81CQ
Hum on picture - varies with picture.Fit 22k in series with D402 if not fitted.