Dicas Reparação

Modelo - Chassis STRV25

Pesquisa: STRV25 Enviar Dica Resolvida
Resultados 6
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DEFECTIVE RELAY When the unit is cold, the speaker protection relay (RY601)clicks, but no audio comes out. Opened the case of the relay and foundthe flux from PC board which was preventing the contact of the switchinside the relay.
AGED RESISTORS The customer has owned this unit for 16 months and has hadit serviced by an independent servicer 4 times. She said it would playfor a while and then one or both channels would go out and it would stopworking. The relay would kick out.
ERROR IN MANUAL Page 7 Procedure 2, error adjust RT101 for 76 kHz +/- 100 Hz.This is opposite STR-V2/-V3/-V4.
MODIFICATION ON MOUNTING FLAME PROOF RESISTORS Q652 failed causing flame proof resistors R633, 664, 665 tooverheat and open. This type resistor gets very hot before opening sincethese are mounted tight against the board. Damage will occur when theyget hot.
MODIFICATION FOR RELIABILITY 2SA979 transistor (Q605/655) fails. -HQ COMMENTS: See upcoming S/B: 100 ohm emitter resistor gets replacedby 150 ohms (also in Technical Newsletter #8110).
ERROR ON PCB SILK SCREEN Q605/655/606/656/607/657/608/658/609/659/610/660/612/613/614/615/616 are all marked wrong on PC board.

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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