Dicas Reparação




Modelo - Chassis


Pesquisa: Enviar Dica Resolvida
Resultados 73072
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MarcaModeloCh:SintomaCausaSoluçãoPor:
SonyICF2001NO AM All functions worked except AM, found Q41 (2SK107) withintermittent lead.
SonyCFS500TAPE JAM Tape counter belt comes off and jams in take up spindle assy.
SonyCFS500MANUAL ERROR Manual error. P. 30 (2) Ref. #16 shown #16 pointing to spkgrille should be Ref. #14.
SonyCFS45ERROR IN SERVICE MANUAL The IPB on page 37 shows the capstan belt as a take-up belt.Also T/R S/B 66 gives a new P/N for the belt. -HQ COMMENTS: We are issuing a S/B and T/N.
SonyPST22LOW LEVEL NOISE Turntable, develops a low level static-like noise which isinduced into the audio ckt. The cartridge used also affects the level ofthe noise. An ortofon LM-10 produces about twice the amplitude of aSony VL-7. Grounding the motor shaft to ckt. ground el
SonyXR70IMPROVING AMS RESPONSE AMS would not operate for tapes with less than 4 to 6 secondsof silence. Problem appears most often when rewinding close to thebeginning of the tape.
SonyTFM7720WDEFECTIVE OSCILLATOR No FM. All voltages looked good. All transistor wereconducting. Osc. was not working.
SonyPSX45REVOLUTION NOISE This unit produced a HEARTBEAT sound (one per revolution ofthe platter) which increased in intensity as the tonearm moved toward thecenter. This noise was being magnetically induced in the cartridgewindings. Scoping the motor drives revealed spikes on
SonyICR4800NO AM RECEPTION No AM.
SonyICF2001COULD NOT RECEIVE AM STATIONS Pins 2, 11, 12 and 13 of IC201 were inconsistently outputtingdata. Latch IC205 was not able to switch antennas to receive AM stations.
SonyKP5040POOR BLUE RESOLUTION, REPLACED BLUE CRT This unit had poor blue resolution and some bleeding.
SonyKP5000COLOR DISTORTION This unit would change the width of the green raster by twoinches when going from min to max brightness. The unit would alsoconverge OK on internal generator and then when it went back to video, theunit would be misconverged but would still check OK on
SonyKX2501DEAD, REPLACED Q651 AND Q653 Unit came in with Q652 shorted and seven amp fuse blown.Found that excessive current drawn beyond 65V AC when variable inputtransformer turned up. This was with B+ unloaded from power circuit.Individual measurement of power supply components showed both
SonyKX2501LINES ACROSS SCREEN TOP AND BOTTOM, NORMAL (SUPPORT WIRE) When viewing monitor with no video there are faint whitevertical lines across the screen. This appears to be horiz. pulsespossibly from the scan derived B+ voltages. Customer noticed these whilerecording with camera and became very critical. He insist
SonyKV8000SHUT DOWN Set works fine for an hour or so then goes dead. Will comeback on and repeat.






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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