Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 79038
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VERTICAL BARS ON THE SCREEN This unit had several vertical bars on the left side.
MECHANICAL DAMAGE, Q601 LEAD Leads of Q601 are breaking due to mechanical stress. Duringmanufacture, the leads are being stretched tightly before soldering.As the heat sink flexes during shipping, the leads break.
H FLAGGING ON THE TOP OF THE SCREEN, REPLACED IC501 This unit had slight horiz. flagging at the top of the picturewhen using the still/slow features on an SL-2700. All other modes (offair, cable) worked fine as did other Betamax and VHS sources. The onlyproblem was with the still/slow features on the SL
DARK PICTURE AND RETRACE LINES, SHORTED C548 AND OPEN R555 Dark pix-retrace lines very faint. No screen voltage toG-2 of CRT.
SOUND DISTORTION, REPLACED LEAKY C116 Intermittent, uncontrollable sound. Remote inoperative.Indicator light on at all times. All manual functions worked fine exceptpix and sound.
PICTURE DISTORTION, REPLACED NE701 ON "C" BOARD When the brightness and contrast controls are turned up(max. beam current), the picture intermittently flashes and produceslarge horiz. dark lines. We found NE701 on the CRT board to be the cause.
DEAD This unit initially was found to have a shorted regulator,regulator driver and power module. After replacement we found the B+ tobe low, about 105V. We found neon NL601 in the power supply to be thecause.
SNOWY PICTURE In the last 2 months the tuner was replaced three times,found C217 cap leaky. Pix would go to snow.
PART'S COMPATIBILITY When subbing the 1-463-109-00 tuner with the 1-463-132-00,the channel indicator numbers go down when they should go up and viceversa. -HQ COMMENTS: Replace the original tuner. In addition you have to orderDIAL DRUMS from KV-1511: S/M Page 32, P/N 4-31
INTERMITTENT SHUT DOWN, REPLACED Q509 Found Q509 (HV Protect) breaking down. Replaced Q509.
NO PICTURE, RESOLDERED C653 This unit had no picture and received FM stations instead ofTV freq. A quick examination of the power supply revealed that the 14Vand 40V (tuning) lines were very low (6V). We found the connection onC653 to be poor. This is the coupling capacitor betw
NO TUNING OPERATION Would not tune any channels. VC voltage to tuner remainedhigh. No pulses out of the IC001.
NO PICTURE, REPLACED IC1201. R668, AND R676 This unit had a washed out picture with no control of pictureor volume. Also unit had no audio out.
SHUT DOWN, REPLACE Q501 AND Q502 If set was turned on with 120VAC, horiz. output would shortout within 2 to 3 seconds. Removing collector B+ off horizontal outputI was able to bring set up to 120VAC and observe the driver output. Foundwaveform to be distorted, should look like a squar

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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