Dicas Reparação HITACHI




Modelo - Chassis


Pesquisa: HITACHI Enviar Dica Resolvida
Resultados 1003
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
HitachiC28P759
NO PICTURE SMELLS OF BURNINGC525 DRY 2u2 100v , IF NO EW ORDER BS208 MOD KIT FROM WVE
HitachiC28P745VT Salora
Field distortion when heatedFlyback boost diode D571 leaky
HitachiC2886TN A7
When changing LOPTxsPay attention to type of replacement transformer; if not identical you may need to change links (see Serge)
HitachiC2886TN A7
St/by only but LED dim as though working (TDA8375 version)DJ on the ground link which is located between small caps C528, C529 near the 2 X-tals X501, X502. The DJ was on the component side of the PCB.
HitachiC2886TN A7
Sound - int crackleResolder caps around sound o/p IC - build up of residue on legs
HitachiC2886TN A7
Pic takes long time to appearChange R896,R897 & R898 from 150R TO 220R & set A1 to 147v at green Tr cath
HitachiC2886TN
service mode enteringHold down menu key until install line appears, press up & down vol buttons together until service becomes an option then follow on screen prompts
HitachiC2886TN
No sound - pic okMuting Tr Q4000 turned on by micro. Put EEPROM into "E2 shipping mode" to set all settings to default cured it although had to retune.
HitachiC2886TN
Long time for pic to appear at sw onadjust Set H.T. to 149 volts +/- .2%, Screen ( A1 ) for 147 volts on green cathode. Picture should appear aft 5 - 10 secs after sound at sw on if still a problem change R896;897;898; from 150R to 220R
HitachiC2886TN
Blank, black raster, sound okReplace ST24W16 EEPROM - to select service menu: with main menu on screen, hold vol + & - buttons on the tv until menu changes to include service option. highlight service and press vol+ to enter.
HitachiC2874TNY
Reverts to st/byCheck IC4451 TDA7253M audio chip & R952 68k in HT preset network
HitachiC2874TNX
Trips with red led blinkingDry joint Q953 coll under plastic runner
HitachiC2874TN
Int width & E/W distDry joint wire link J196 between C612 & R080 connected to plug E180 via Pin 8 (EW connection).
HitachiC2874TN
Int E-WR751 across C758 on comp side of pcb not soldered
HitachiC2874TN
Int dead - can come back on its own. Sometimes red/green or no LEDDry joints on IC951, Q953, and Q956. Q953 was the worst, all connections to each leg were faulty.


Assistência TécnicaAs dicas apresentadas destinam-se a técnicos de eletrónica, a tentativa de reparação ou assistência sem ter conhecimentos de eletricidade e eletrónica, podem provocar danos mais graves aos equipamentos e, devido a tensões muito elevadas em alguns circuitos, graves danos fisicos que podem constituir um risco em determinadas reparações.

Não arrisque reparar equipamentos com tensões elevadas se não tiver conhecimentos técnicos para o fazer em segurança.

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