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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
Make
Model
Problem
Solution
Date
Found: 23
Hitachi
NP83CQ
Bright on LH side of raster
C715 2µ2 250v o/c
14-09-04
Hitachi
NP83CQ
Channels - no channel change & no raster.
Q1454 ( cita Pcb )
14-09-04
Hitachi
NP83CQ
dead
2A fuse blackened, STR6020 s/c, Loptx s/c windings, 2 x 1R safety re o/c (no 12v or 30v) & TDA3651 field chip u/s
14-09-04
Hitachi
NP83CQ
dead
won't work on dummy load unless loptx removed - loptx faulty
14-09-04
Hitachi
NP83CQ
dead
STR6020 s/c; R715 2R2 o/c; 2A fuse o/c; R901 6R 6w o/c; TDA3651 u/s
14-09-04
Hitachi
NP83CQ
Dead with "1" in display
No B+ volts until loptx removed (130v) - new loptx cured it & HT normal at 110v
14-09-04
Hitachi
NP83CQ
Field bounce - top inch of pic int disappears
C613 100n across field scan coils
14-09-04
Hitachi
NP83CQ
FIELD COLLAPSE OR FIELD FLUTTER
C603 1uF TANTALUM
14-09-04
Hitachi
NP83CQ
Frame - foldover after 10 mins.
C613 ( 100u f ) o/c.
14-09-04
Hitachi
NP83CQ
Height reduces on warm up
TDA3651A field chip u/s
14-09-04
Hitachi
NP83CQ
Int/crackly sound
tone control under front flap noisy
14-09-04
Hitachi
NP83CQ
No cold start
C908 33µ
14-09-04
Hitachi
NP83CQ
No pic just vert lines
same with txt pcb removed - TDA3561A decoder chip u/s
14-09-04
Hitachi
NP83CQ
NO PICTURE OR SOUND PSU & Line ok
12v RAIL LOW R716 OC OR HIGH 2R
14-09-04
Hitachi
NP83CQ
No raster - sound ok
No lum from IC501, sandcastle pulse low; R720/721 1M hi res
14-09-04
Hitachi
NP83CQ
No raster - sound ok.
R720 , R721 ( 3.9k ) gone high.
14-09-04
Hitachi
NP83CQ
No raster & no channel change.
Q1454 ( cita Pcb )
14-09-04
Hitachi
NP83CQ
NO S/V , IN AV MODE
ZD1438 12v ZENER
14-09-04
Hitachi
NP83CQ
Pic made up of large white dots
IC501 TDA3561A
14-09-04
Hitachi
NP83CQ
Red raster & white hor lines on txt
TDA3561A u/s
14-09-04
Hitachi
NP83CQ
Trips into st/by
ok on dummy load - Loptx Pt no 2433752
14-09-04
Hitachi
NP83CQ
Weak contrast, no col - sound ok, controls have no effect
IC501 TDA2561A
14-09-04
Hitachi
NP83CQ
WORKS FOR 2mins THEN CHANNEL DISPLAY GOES OUT , PI
NO 5v PIN 20 MAB8422 5v REG OR BRIDGE RECTIFIER ON CITAC PANEL
14-09-04
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