Sony str-de 685

[vksamael]

Hello
I have this receiver and right channel is quieter than left i changed uPC2581V ( 2 pieces transistor driver ) and problem is same all transistor is ok
i need schematic and little help with this
thanks

[sakis]

this one will not be easy ... schematic is availble ...email me to have it ... then the best will be to seperate pre and main to find out where tha fault is coming from

regards sakis

[sakis]

measuring the voltage on the pins of the ic will only tell you things about the electrical status of the circuit

this will provide you no information regarding how much an what type of signal comes in and out

then again in your pm you are talking about some electrical noise that i didnt understand much you will need to clarify this

in a few words if your problem is diferent levels of sound from chanel A to B this might come from the preamplifier section ....you will need scope and signal generator to check this

it could be anything and nothing .... as about this buzz you re talking about it could be a ground or plug issue so you need to check this also

sorry but it seems to me that you dont have the skills to troubleshoot that ....i would like to help you but we need to understand the same language for starts (electronics ) ....i will try though

please check your e mail for the schematic

[vksamael]

Yes i know what you mean but dont worry i need schematic and i think that is enough i have some of skill but my english is not god sorry
thanks for schema when i try some i will post here