Update - the source of the protection fault has been located. One of the NEC voltage amplifier ICs was faulty and dumping full B+ into the right channel output transistors. After removing it and swapping over the surround IC, the receiver is back to its original problem. We fixed nothing. Very likely something on the digital board is fried on this guy.
What problem is that? No sound? I was never able to find out what's causing that on this unit. Going into protection was caused by a faulty IC501. After removing it, it no longer goes into protection but is back to the original problem. To diagnose, you will find five large white ceramic double resistors near the power amp output transistors. They'll be big white blocks with three metal pins coming out of them. Measure between the center pin and ground - you shouldn't find DC voltage of any significance, maybe around 4-5V. I got 47VDC on one of them, which traced back to one of the outputs on IC501. Resolder any bad joints first to rule that out.
Hello, I have a question for you regarding a sony home stereo receiver model da5600es! Unfortunately I did a factory reset an did the sony suggestion memory clearing in there manual. Anyway now the receiver is stuck on memory clearing all of a sudden, I'm totally bummed out at this time sir. Can you help with this issue, is it a common problem with sony an this memory clearing issue? Thank you.....
Update - the source of the protection fault has been located. One of the NEC voltage amplifier ICs was faulty and dumping full B+ into the right channel output transistors. After removing it and swapping over the surround IC, the receiver is back to its original problem. We fixed nothing. Very likely something on the digital board is fried on this guy.
As far as AV amplifiers go, the DB940 and 840 are tthe BEST ive ever heard for stereo, unfortunately the wave soldering process sony used was terrible
Why was it so terrible?
Hello everyone, I have the sony str DB 940. I have the same problem does anyone know where I can get the replacement parts
Digikey
What problem is that? No sound? I was never able to find out what's causing that on this unit. Going into protection was caused by a faulty IC501. After removing it, it no longer goes into protection but is back to the original problem. To diagnose, you will find five large white ceramic double resistors near the power amp output transistors. They'll be big white blocks with three metal pins coming out of them. Measure between the center pin and ground - you shouldn't find DC voltage of any significance, maybe around 4-5V. I got 47VDC on one of them, which traced back to one of the outputs on IC501. Resolder any bad joints first to rule that out.
Hello, I have a question for you regarding a sony home stereo receiver model da5600es! Unfortunately I did a factory reset an did the sony suggestion memory clearing in there manual. Anyway now the receiver is stuck on memory clearing all of a sudden, I'm totally bummed out at this time sir. Can you help with this issue, is it a common problem with sony an this memory clearing issue? Thank you.....
Sorry, I don't work on these often enough to be familiar with that one.
??? new problem came out