hitachi G7PS Repair Tips


AIWA
BEKO
CCE
CINERAL
DAEWOO
FUNAI
GRADIENTE
GRUNDIG
HITACHI
ITT
JVC
LG
MITSUBISHI
PANASONIC
PHILCO
PHILIPS
PIONEER
RCA
SAMSUNG
SANYO
SHARP
SONY
THOMSON
TOSHIBA
VESTEL


Search: G7PS hitachi
More Tips PT-BR

Results 37
MakeModel Ch.SymptomProblem SolutionSolutionBy:
HitachiG7PSMK2
Standby only.R902 ( 82k ) o/c.
HitachiG7PSMK2
Int frame collapse.Drys on frame IC & LOPT.
HitachiG7PSMK2
Dead - HT low 45v.Change C910 , C914 , C916 , C929
HitachiG7PSMK2
Dead - HT at 145v.R909 high.
HitachiG7PSL2
St/by onlyZD903 130v zener s/c; C906 4µ7 250v hi esr; R901 6R8 5w o/c;Q903 BUT12AF s/c; F901 2.5A o/c - all caused by dry joints T901
HitachiG7PSL
St/by onlyQ781 2SD1884 LOPTr, Q903 BUT12AF chopper tr & ZD903 P6KE180A overvolts zener s/c - R760, R761, R762 & R766 2R2 ½w hi res
HitachiG7PSL
NO TUNING - JUST SNOW ( TUNING BAR PRESENT ON SCRER044 12k OC. ZD002 ( 33V Zen ) Q003
HitachiG7PSL
No signals - osd searchesTuning volts missing VT pin tuner, R044 12k o/c
HitachiG7PSL
Field non linC712 2200µ 50v & C606 680µ 16v
HitachiG7PSL
Field jitter when hotD601 1N4002
HitachiG7PSL
Field chip has short lifeAdd 2 x 33v zeners in series - cathodes to pin 2 IC601 & anode to chassis - if this has no effect , could be crt flashover
HitachiG7PSL
Excess bright rasterRGB colls low volts - Q801 BC558B leaky (on main pcb)
HitachiG7PS2
When tried to tune in the correct display appearedThe 33V tuning voltage supply was missing because R044 ( 12k ) was open-circuit.
HitachiG7PS2
STANDBY ONLYIC703 DRY JOINTS
HitachiG7PS2
Shuts down aft 20 secs with buzzIn prot mode (shutdown volts at pin 20 TA8690AN) ZD701 3v9 zener leaky
HitachiG7PS2
OSD NOT CLEARINGDOO7 HIGH
HitachiG7PS2
No signals Tuning bar moves as if tuning but no vaCheck R044 ( 12K )
HitachiG7PS2
No OSD set works okReplace HD401314RS
HitachiG7PS2
INT. FLAG WAVING AFTER TELETEXT USEIC2002 ( TEXT PCB )
HitachiG7PS2
INT DEAD39K - 82K POWER SUPP - ALSO D/J on reg 12V (EDGE OF PCB BY LOPT. )