Dicas Reparação




Modelo - Chassis


Pesquisa: Enviar Dica Resolvida
Resultados 79655
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyKV1913
DARK PICTURE Dark picture.
SonyKV1913
SOUND DISTORTION After warm-up sound would distort and change in volume.
SonyKV1714
SET LOCKS ON CH 2 Set locked on Ch. 2 defective CX804 (IC033) decreasing 35Vsupply.
SonyKV4000
NO TUNING ON VHF LOW No automatic nor manual tuning on VHF low, VHF high andUHF band. Found no voltages at VC terminal of tuner - resistancemeasurement showed short to ground - tracing back found short at M1 plugon M board - Pin 8 shorted to Pin 9.
SonyKV2645R
SNOW PICTURE, REPLACED X001 Intermittently, TV reception would stop except for a verypoor channel 6, snow on all other channels. Address line A always high(11.9V) regardless of channel selected.
SonyKV2643R
PICTURE SHIFTS, DEMAGNETIZED CRT Graphics were shifted to the right. When unit was taken toservice shop and center-cross generator placed on set the centering wasoff approx. 2 inches to the right. All associated circuitry was checkedand found to be in proper operating condition. Repl
SonyKV2643R
NO PICTURE, REPLACED C607 The following parts were bad in this set: Q901, Q902, Q601,R605 open, R609 open, R232 open, connector A-10 on PC board arcing.After all these parts were replaced, the set would come on and thepicture would blink severely, both horizontally and verticall
SonyKV1945R
NO PICTURE, C1008 IN PRESCALER SHORTING TO FRAME The following notes were made in determining problem. 1) Nowave train at PLL IN, TP59. 2) No voltage on Pin 15, IC003. 3) Voltageat tuning point on tuner went to 31.5V and would not vary. Cause - C1008on prescaler was shorting to adjacent frame on p
SonyKV9300
INCORRECT BRIGHTNESS The set has an excessive brightness. The screen control ishigh and cannot be adjusted, R706 is open.
SonyKV9300
RETRACE LINES Retrace lines, no screen control.
SonyKV2645R
AUDIO CRACKING, REPLACED T207 Intermittent audio cracking.
SonyKV2643R
NO SOUND No sound, picture OK.
SonyKV2643R
CHANNEL LOCK, REPLACED L001 Right after turn-on, tuner would lock on a channel. Wouldnot change channels manually or by hand unit. It had no clock on Pins12 and 13 of IC001 (volume and on/off OK).
SonyKV1945R
POOR REMOTE OPERATION, RESOLDERED X002 ON MD BOARD Poor response from remote control. Poor range - missesfunctions.
SonyKV1945R
POOR REMOTE OPERATION, RESOLDERED SHIELD TO N BOARD Weak remote range. This unit had poor shield ground on theN board causing the short range of remote control.


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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