Hi everyone.
received a faulty Sony STR-DE598.
As title says, front channels volume is lower (possible more tinny too, not sure) then it should be by quite a lot (still very audible at max volume).
Rear channels and Center are all fine, very good volume at mid volume.
It's not a settings issue, I fiddled with them and even did a factory reset.
Most likely a board issue, I've inspected it visually and all seems fine.
Inputs are likely ok because as said, rears are good (front input upmixed to surround)
this receiver has A and B front, both are effected.
relays seems ok, I've tapped them and no change. they click as they should. each front (A B) has its own relay. Transistors however are shared as the amp is rated 6X150W
I'm far from expert, very much a beginner, they only receiver work I ever did was re-soldering cold joint on similar but older sony.
My thought is that either its a transistor issue or caps.
some more info: the amp is rated 150W per channel which gives quite a lot of headroom for the transistors, I think the amp wasn't driven too hard during its life.
I tried to check the headphones out port, to my surprise, volume seems low there as well. I have to put it at max volume to get to a conformable volume level and even then it tiny bit low.
Compared to another Sony receiver I have here which at mid volume is already too loud. I'm not sure if its related or not.
Then there are the capacitors. I don't know much about how to diagnose that, and which ones will need to be replaced.
Here is a general picture of the inside: I'll gladly provide more pictures and info.
https://imgur.com/g38m38d
Thanks!
received a faulty Sony STR-DE598.
As title says, front channels volume is lower (possible more tinny too, not sure) then it should be by quite a lot (still very audible at max volume).
Rear channels and Center are all fine, very good volume at mid volume.
It's not a settings issue, I fiddled with them and even did a factory reset.
Most likely a board issue, I've inspected it visually and all seems fine.
Inputs are likely ok because as said, rears are good (front input upmixed to surround)
this receiver has A and B front, both are effected.
relays seems ok, I've tapped them and no change. they click as they should. each front (A B) has its own relay. Transistors however are shared as the amp is rated 6X150W
I'm far from expert, very much a beginner, they only receiver work I ever did was re-soldering cold joint on similar but older sony.
My thought is that either its a transistor issue or caps.
some more info: the amp is rated 150W per channel which gives quite a lot of headroom for the transistors, I think the amp wasn't driven too hard during its life.
I tried to check the headphones out port, to my surprise, volume seems low there as well. I have to put it at max volume to get to a conformable volume level and even then it tiny bit low.
Compared to another Sony receiver I have here which at mid volume is already too loud. I'm not sure if its related or not.
Then there are the capacitors. I don't know much about how to diagnose that, and which ones will need to be replaced.
Here is a general picture of the inside: I'll gladly provide more pictures and info.
https://imgur.com/g38m38d
Thanks!
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