I suspect intermittent 31V supply, filament supply or bad connections on fluorescent display. Check Q801 31V reg , R802, zener on base of Q801 located on DC board. Inspect all boards for bad solder joints, reflow and tighten pcb grounding screws.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Maybe the Preamp driver IC, looks like a car audio ic on the main board. Often with age the heat generated by the ic will destroy the solder.Makes it look like lava rock in bar-b-que grill. Which causes an open circuit in the preamp driver to the audio power stage. Simply resolder them, most often restores audio. Should have a bottom removalble cover. If not, a fuse normally blows if ic or channel is shorted. Check if display will say Power off, Protect, etc. That means there is a problem with a channel. Most Sony receivers use darlington transistors, they short easily !! I am an old school component level service tech, I think I do have a schematic for this model and many others.
I assume you mean the sony dosen't have a phono input? Then all you need is a Magnetic Cartridge Pre-amp. Your turntable plugs into this and the pre-amp goes into a spare aux on the Sony. Just do a search for the Pre-amp on google by putting in "Magnetic Cartridge Pre-amp".
Maybe, it worked for me. my rear speakers workt ramdomly, often not. so i re solder the relay for the rear speakers, now it works fine everytime, a hole movie and some random on and offs, it can't do any harme to try=)