Dicas Reparação




Modelo - Chassis


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(Chassis)
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SonyCDP302
NO FUNCTION OR CANNOT READ TOC A small metal roller guide was sitting on top of the discmotor and preventing disc from setting on it. This roller came off fromdisc plate #373 which has 4 guides. -HQ COMMENTS: The disc plate has been changed to a new one in currentproductions, and no
SonyKV1953R
NO DISPLAY - CUSTOMER CONTROLS INOPERATIVE, Q2004 AND Q2001 Raster/HV OK, but local customer controls had no effect.Channel UP/DOWN etc. inoperative. Display dead. No waveforms at allaround IC2001 (controller).
SonyKV2675R
PAC-MAN PATTERN ON SCREEN, NO VIDEO NO VIP function, Pac-Man pattern flashes on screen at theclock rate about once a second. RCA uses this same IC051, MB88303, chipin some of their VCRs and they have the same problem.
SonyKV25XBR
VERTICAL JITTER This unit had a one inch vertical jitter when playing copyguarded tapes on a Fischer VCR (Model FVH 839).
SonyKV2691R
MUTED PICTURE AND NO VIP OPERATION AND NO REMOTE, D-062 The picture was muted and sometimes after warm up pix wouldcome on. IC052 Pin 2 was high. Found D062 installed backwards atfactory. D062 was installed cathode to B+. The board and the boardlayout show the diode anode to B+. The schematic shows catho
SonySL10
SOLENOID PLUNGER The original part # 1-454-349-41 was subbed to 1-454-365-51.The new solenoid fit the unit, but the collar on the plunger would notclear the mounting pieces on the unit. The original plunger had nocollar. We need to have the plunger changed on this sub.
SonyWMF15
DAMAGE CAUSED BY BATTERY Negative end of battery heated up and pushed cabinet out. -HQ COMMENTS: New batteries from Eveready and Duracell may have shortedinside the unit. They have a plastic skin instead of old metal. Underthe skin is the positive cylinder, and negative termi
SonyKV2691R
DARK BAND ACROSS CRT, REPLACE Q-204 The unit had a dark band across the CRT about 2/3 up fromthe bottom. The colors were also weak and somewhat out of phase.
SonySLHF600
DISTORTION ON BETA HIFI Problems with Beta HiFi playback and record. Customer livesless than 1/2 mile away from a Broadcast Station transmitting on 1350KC.Traced problem to the cable TV line that was hooked up to the FM input ontheir Denon DRA-400 receiver. The Denon had a 75
SonyKV1972R
NO MANUAL CONTROL, REPLACE IC105 All front panel controls on the unit became inoperative (SND,PIX, CHAN, PWR), however, the remote worked on all functions.
SonyKV2680R
NO VIP, REPLACE IC-105 No VIP operation. All other functions worked correctly.
SonyKV1390R
SHUTDOWN, REPLACED R559 The unit would go into immediate shutdown. We shorted C535 todefeat the shutdown circuit and then ran the unit up on the variac. Allother circuits were functioning properly.
SonyKV1993R
LOCKED IN ONE MODE/NO CHANNEL CHANGE, REPLACE V OUT IC501 The PLL controller/IC103 was locked up. The channels wouldnot change and audio/pix outputs were at minimum. We found the verticalpulse to be missing at the controller/IC103. This was caused by adefective vertical output/IC501.
SonyXR75
NO FM This unit had no FM, all other functions worked fine. Foundthat there was no output from the prescaler to the PLL.
SonyBMC110
SLOW STARTUP OF AUDIO ERASE FUNCTION At the beginning of a recording, old audio would not beerased for approx. 14 seconds. After this time, normal erasure ensued.


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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