Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 76239
Pedir dica reparação
OPEN R36 When the unit is turned on after a couple of minutes aclicking noise is heard at the speaker.
OUT OF ALIGNMENT High-frequency SQUEAL through audio system with CDP-101 inany mode (STOP/PLAY/PAUSE). Checked completely and looked at output withoscilloscope. No high frequencies were audible.
LOOSE RIGHT RAIL ON SLED Loose right rail on sled. Holder bracket missing.
DEFECTIVE CX-79034 Static noise in both channels after 8 to 10 minutes. Foundnoise being generated at output of CX-79034.
OUT OF ALIGNMENT Rumble in audio. Checked unit and found no problem. Problemcould be in software or playback system. Did complete alignment for unit,focus servo slightly out of range. Returned to customer.
SHORTED WIRE -10 volt line (from CN542 to CN536) was shorted to chassisnear bracket (bottom) to the rear of the sled assy.
LARGE DISTORTION Unit produced large distortion during tape operation withoutboard display No. 'DPL -EL.
HIGH TORQUE MEASURED After installing new take-up arm assembly, forward torquemeasures 55 to 65 q/cn. This may be contributing to tape skew problems,by requiring increased back tension.
PROBLEMS AROUND IC501 Unit will not lock into play mode and the service manualschematic does not agree with its own board layout in the book andneither agree with the board in the unit. -HQ COMMENTS: Release from play could be initiated by reset pulseor slow oscillator (R-C
GROUNDING SPRING NEEDED Intermittent static noise was recorded when humidity levelsare low, erase and R/P heads were eliminated by grounding to chassis thisproblem occurs both on record and playback. -HQ COMMENTS: 1) Please apply grounding spring to erase head as outlinedin Ta
OPEN C410 The 78V line was reading about 110V on this unit and thesound was distorted. Adjusting RT401 had little effect. We found C410to be open and causing the problem.
SHORTED D406 The 15V line was down on this unit. We found D406 shorted(located in regulator circuit).
POOR CONNECTIONS ON Q414 This unit had a dim display and erratic tuning Q414 was foundto be poorly soldered on the base and emitter leads.
ARM NEEDED ADJUSTMENT Cantilever of cartridge was being pulled to one side, bendingit eventually also mistracking in one channel, poor dynamic range, etc.
ERROR IN PCB DIAGRAM When RD amp fails, technician replaces Q52 as labeled on PCB,diagram is incorrect.

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