Dicas Reparação




Modelo - Chassis


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Resultados 81543
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyTAF3A
TRANSISTORS SHORTING TO HEAT SINK After the output transistors have been replaced, and unit hasplayed, the outputs will go out again.
SonyTA4650
DC BALANCE DC balance on the speaker outputs is determined by matchingof Q302 and Q303.
SonyTA2650
REPLACEMENT TRANSISTORS ARE IMPROVED Customer complained of noise with volume control at midposition, standard input levels.
SonyTA2650
SWITCH OUT OF PROPER LOCATION No audio output on any function - function switch (S1) wafers180 degrees out.
SonySTRV55
LEAD DRESSING NEEDED Whining noise from processor with no FM signal and muting off.
SonySTRV55
WIRE NUMBERS ARE REVERSED Incorrect wire number. Numbers #1 and #3 reversed.
SonySTRV35
DEFECTIVE OUTPUTS The NPN output transistor opened on one channel of each ofthese receivers. No other problems found.
SonySTRV2
P/N FOR GLASS Cases of concealed damage to front glass on these models havebeen reported. Present solution is to replace entire front panel assemblybut it is costly. -HQ COMMENTS: A similar situation developed on the STR-4800SD, -5800SD,-6800SD models 3 years ago.
SonySTR7065
PROTECTION TRANSISTORS REVERSED Burned main amplifier board was replaced (X-482-232-50).Amplifier clipped at 1 watt out.
SonySTR212
DEFECTIVE IC20, 301, Q301, 302 No AM or FM - IC201 voltages incorrect, Q301 collector read 11volts. Replacement of individual IC, would knock the other chip out.
SonySTC7000
ADJUSTMENT NEEDED The maximum deflection on tuner input meter did not correspondto center channel on tuning meter. Adjustment of FM discriminator and FMIF was unsuccessful.
SonySQA2030
DEFECTIVE Q701 Noise in back channel outputs. -HQ COMMENTS: Replaced regulator transistor Q701, 2SC1124.
SonyPSX70
WEAK MOTOR Tone arm would not complete return and play cycle wouldstop widway most times.
SonyPSX40
DEFECTIVE MGH Turntable speed erratic. Maximum output from MGH was 15-20MVp-p. Even slight readjustment of the head caused it to scrape theplatter.
SonyPSX30
LOOSE LEAD ON C101 Frequent slowing down of motor. Found one lead of C101loose.


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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