HITACHI NP83 Repair Tips




Search: NP83 HITACHI
Results 28
MakeModel Ch.SymptomProblem SolutionSolutionBy:
HitachiNP83CQ
WORKS FOR 2mins THEN CHANNEL DISPLAY GOES OUT , PINO 5v PIN 20 MAB8422 5v REG OR BRIDGE RECTIFIER ON CITAC PANEL
HitachiNP83CQ
Weak contrast, no col - sound ok, controls have no effectIC501 TDA2561A
HitachiNP83CQ
Trips into st/byok on dummy load - Loptx Pt no 2433752
HitachiNP83CQ
Red raster & white hor lines on txtTDA3561A u/s
HitachiNP83CQ
Pic made up of large white dotsIC501 TDA3561A
HitachiNP83CQ
NO S/V , IN AV MODEZD1438 12v ZENER
HitachiNP83CQ
No raster & no channel change.Q1454 ( cita Pcb )
HitachiNP83CQ
No raster - sound ok.R720 , R721 ( 3.9k ) gone high.
HitachiNP83CQ
No raster - sound okNo lum from IC501, sandcastle pulse low; R720/721 1M hi res
HitachiNP83CQ
NO PICTURE OR SOUND PSU & Line ok12v RAIL LOW R716 OC OR HIGH 2R
HitachiNP83CQ
No pic just vert lines same with txt pcb removed - TDA3561A decoder chip u/s
HitachiNP83CQ
No cold startC908 33ยต
HitachiNP83CQ
Int/crackly soundtone control under front flap noisy
HitachiNP83CQ
Height reduces on warm upTDA3651A field chip u/s
HitachiNP83CQ
Frame - foldover after 10 mins.C613 ( 100u f ) o/c.
HitachiNP83CQ
FIELD COLLAPSE OR FIELD FLUTTERC603 1uF TANTALUM
HitachiNP83CQ
Field bounce - top inch of pic int disappearsC613 100n across field scan coils
HitachiNP83CQ
Dead with "1" in displayNo B+ volts until loptx removed (130v) - new loptx cured it & HT normal at 110v
HitachiNP83CQ
deadSTR6020 s/c; R715 2R2 o/c; 2A fuse o/c; R901 6R 6w o/c; TDA3651 u/s
HitachiNP83CQ
deadwon't work on dummy load unless loptx removed - loptx faulty