Dicas Reparação




Modelo - Chassis


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(Chassis)
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SonyTV125
NO TURN OFF OPERATION Power switch S901 operates by breaking ground connection. Inexternal DC mode such as mobile camping trailer installation, unit cannotbe turned off since DC return path is continued thru antenna transformers.Camping trailer antenna contacts body when in
SonyKX2501
INCORRECT PURITY, RESOLDERED THP-601 Servicer complained that Profeel 25-inch Monitor would notHOLD purity adjustment if it was rotated on bench. Other TV's andmonitors in shop had little effect from rotation. Distributor duplicatedproblem on another set out-of-box, however auto-degaussin
SonyKX1901
WEAK VIDEO Very weak video.
SonyKV2648R
HUM SOUND, ADJ T204 AND T205 Constant 60Hz hum heard on audio when HBO or SHOWTIME isselected. Tone enhance feature on TV boosts hum level even louder. TheJerrold JSX3DIC cable box does not remove the 60Hz AM sync pulse off thesound carrier to the TV. If the alignment is not perf
SonyKV2648R
NO SOUND, REPLACED R5038, R5039, IC5004, IC5005 Set had no sound, found R5038 and R5039 open. Also foundIC5004 and IC5005 shorted on X board.
SonyKV2602
RETRACE LINES IN THE PICTURE, REPLACED L503 Retrace lines in picture.
SonyKV1952R
GREEN SCREEN, HVR Green screen.
SonyKV1952R
NO DISPLAY, REPLACE ZENER D2003 AND Q2007 Original complaint was display out. Found channel displayonly partially lit during channel change, and sound up would cause pix upto change at the same time. Also, channel up or down would cause sound tomute. Traced sound problem to IC2001, Pin 10 - P
SonyKV1947R
INCORRECT SOUND MUTE, REPLACE IC001 Sound would intermittently go off and if you changed channels,the sound would come back on. Problem was being caused by the mutefunction of IC001.
SonyKV1946R
NO OPERATION EXCEPT POWER, LEAKY D010 Unit would not respond to hand unit other than to turn uniton. After set was turned on, no other remote function would work.Voltages at Pins 24/25 of IC001 on ME board too high.
SonyKV1945RS
SHUT DOWN, REPLACED CX-557S AND ADJ R563 Set would work OK for hours then shut down.
SonyKV1915
PURPLE COLOR Purple color shows up on and off. Problem is intermittent.I saw this problem more than 3 times in newer model. CRT pins do not makegood contact in socket of C board.
SonyKV1910
RETRACE LINES ON THE SCREEN Vertical retrace lines were seen on the top of the picture onchannel 2 and 4.
SonyKV1746R
INTERMITTENT SHUT OFF Unit came in with complaint of goes off intmtly and blowsR232 fusible resisotr. Servicer changed Q205, Q206, C238, R212, R246.After all components changed unit went out again and in further investiga-tion, found R231 had 330 ohm instead of 10K as schema
SonyKV1546R
BLOCHES IN PIX AND UNSTABLE, CHANGED VALUE OF R555 TO 82K Screen has oval blotches with no info and will increase insize with signal received. Originally had 100kohm res. installed, aftercomparing with a KV-1547R with a 30P chassis we noticed it had an 82kohm.


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.

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