Dicas Reparação




Modelo - Chassis


Pesquisa: Enviar Dica Resolvida
Resultados 77224
Pedir dica reparação
MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyKV1543R
CHANNEL SEARCH DOESN'T STOP,REPLACED PARTS BELOW All indications were that set would tune properly but wouldovershoot each channel. Result was unstable sync and in general poorpicture quality. Pin 10, IC201 (CX555) AFT was reading approx. 9V vs2.5V. At Pin 2, IC033 (CX804) was reading approx. 10V.
SonyKV1543R
NO REMOTE FUNCTION, REPLACED IC001 Remote does not work, manual OK.
SonyKV9300
NO CONTROL OF BRIGHTNESS No control of brightness, excessive brightness even withscreens and drives down, voltages OK in ABL drive circuits. Also incolor.
SonyKV8000
INCORRECT BRIGHTNESS OPERATION WITH RETRACE LINES Excessive brightness and retrace tube cathode voltages low,10V.
SonyKV2643R
NO SOUND OR PICTURE, REPLACED IC2002 No sound or picture. Could not program any channels norwould the set change address positions.
SonyKV2643R
INCORRECT CHANNEL INDICATION The channel indicator neon lamps are polarized and will notlight when soldered in backwards. The lamps are not marked as to whichway they are to be soldered in.
SonyKV2101
POOR V LINEARITY, R517 INCREASED IN VALUE Poor vertical linearity top 1/3 of picture slightlycompressed. Vertical size control to end of range. Waveform at base ofQ501, blanking pulse 5 msec, it should be 1.2 msec.
SonyKV1714
DEAD Dead set, 1.6 amp fuse blown, horizontal out transistorshorted, B+ regulator shorted.
SonyKV1543R
INTERMITTENT SHUT DOWN, REPLACED R532 The set would intermittently shut down.
SonyKV1201
NO COLOR, RESOLDERED R356 No color. Checked CW signal at the collector of Q307 whichwas not there. Signal was present at the base. I checked the DCvoltage - collector was 18V, that told me that the transistor was notconducting. Base voltage was normal (3V) emitter was 2.8V.
SonyKP5000
GREEN PICTURE, REPLACED C323 Severe bright green screen no control.
SonyKP5000
SHUT DOWN, REPLACED C5112 Immediate shut down - no high voltage.
SonyKP5000
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
SonyFX310
NO AUDIO No audio - any function. Acts like bad function switchbecause if applied additional pressure on knob volume works - releaseknob - no audio.
SonyTPSL2
DEFECTIVE MOTOR Tape player would not run. Motor seemed to draw excesscurrent. A check of the motor revealed the FG winding was shorted to themain winding.


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.

Verifique se o esquema está disponível na área de downloads