Dicas Reparação

Modelo - Chassis 5000

Pesquisa: 5000 Enviar Dica Resolvida
Resultados 280
Pedir dica reparação
NO OPERATION WITH AC Set would not work on AC. All DC checks which we could thinkwere performed. Power supply simply would not start. Found waveform 27would appear for just an instant and die away. Transformer T606 checkedgood so C611 must be culprit.
PICTURE DISTORTION, LOOSE SCREW ON HOR DRIVE TRANS. Q5104 Intermittent horizontal sweep problem causes sweep to collapseand burn a vertical line in the three picture tubes.
DEAD, REPLACED MICA SPACER UNDER VERT OUTPUT TRANSISTOR 2.5 amp fuse on B+ line would blow every 7 to 10 days.Replacement of the fuse restored operation and hours of testing providedno clue to problem causing fuse to open. By by-passing the relay witha jumper and using a variac, increasing AC input to 130V A
POOR PURITY Color purity problems around edge of picture. Problem wascaused by flaking of phosphor edges on all three CRTs.
INCORRECT FUNCTION FOR TUNING, Q2211 LEAKY During programming unit would not stop on active channels inone direction from low to high.
CHANGES CHANNEL BY ITS SELF, REPLACED INFRARED SENSOR Unit would change channels without manual or remote activa-tion. Customer indicated that remote functions would not coincide withremote hand unit when warm (this problem was intermittent).
WILL NOT STOP CHANNEL SEARCH, REPLACED C159 In the program mode, set would not stop searching when astation was tuned in. M-15 on the M board had the required horizontalpulse. M-9 on the M board had the sync pulse. The positive and negativeAFT voltages on Pins 1 and 2 of M-8 appear to be normal
GREEN PICTURE, REPLACED C323 Severe bright green screen no control.
SHUT DOWN, REPLACED C5112 Immediate shut down - no high voltage.
DEAD, BUSHING ON VERT OUTPUT WAS CARBONIZED Unit cannot be turned on. When the power switch is activated,unit comes on for 2 seconds and goes off. Checked and F6103 was foundopen. 120V line was loaded. When I checked resistance from 120V B+ toground, I read 150 ohms both ways. GA-9 (plug) Pin

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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