Dicas Reparação




Modelo - Chassis TV9


Pesquisa: TV9 Enviar Dica Resolvida
Resultados 18
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
Schneider TV9
Line output transistor short circuitReplacement did not clear the fault and the protection circuit was operating. C307 0.047µF, 200V was found to be o/c, when removed it had a bubble on the side, it's part of a potential divider network C306 & C307 in series, centre of which goes to the protect circuit, it is hard to get to being right by the line output transistor
Teknika TV95
servicemode press the right row in following seqence,countet from top:, knob 4,5 (mix) 8( blue)
SsangyongSTV9214R
No colourWaveform at pins 16 & 18 of col dec low - R361 o/c
SsangyongSTV9214R
Field collapseZD401/R414 had failed due to C909/910 causing high HT (sounds like an Onwa)
SchneiderSTV2802 TV9.1
Service mode enteringPress red & blue buttons on RC together. Press prog down & vol up on TV together within 5 secs. Select items using up/down buttons. Parameters use red button. Adjust value using volume +/-. Press OK button to store value. Leave service mode by pressing TV button.
SchneiderSTV2801T TV9.1
Dead with LOPTr S2055AF s/clopt HR8320 (18.44UKP +vat From Seme) - reqs heatsink to be cut to fit in
HarwoodHTV9425RTN
Sync poor when coldC127 3µ3 50v in IF can
HarwoodHTV9425RTN
Off with a bangC926 22µ 250v had exploded & C910 47µ 25v, C908 10µ 50v in pri psu
HarwoodHTV9425RTN
Jumps when cold & int blank rasterR436 3R9 2w dry joints & hi res (near scart)
HarwoodHTV9014R
TrippingEM112 st/by tfmr o/c winding
GoodmansGTV9200
Int loss of pic temp cured by adj of A1C801 2n2 1kv on crt base slight leak
FidelityCTV920
Vert bands across picC50 100mfd 25v - 12v res cap faulty
FidelityCTV920
Poor cold start upXC169 1µ 50v
FidelityCTV920
Low HT or no HT .HT may drop to 0v if line stage dissconnected and replaced by dummy load ( lamp ) .C169 1uF 50v OC , STK7348 may be OC .
FidelityCTV920
Dead apart from buzz & low HT voltsC171 3300pf 2Kv burnt & split


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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