C49 may be the culprit
Replaced AD 744. Rather scary procedure without hot air gun. Have to use 2 soldering irons.
Problem persists after AD744 change. The pins of the op amp is dirty and refuse to bind to solder. Have to use blade to scrap off the dirt.
Direct attention to C47 to C50.
Remove c49 and immediately TP 9 measure about 2.5v
Replaced AD 744. Rather scary procedure without hot air gun. Have to use 2 soldering irons.
Problem persists after AD744 change. The pins of the op amp is dirty and refuse to bind to solder. Have to use blade to scrap off the dirt.
Direct attention to C47 to C50.
Remove c49 and immediately TP 9 measure about 2.5v
Attachments
I think l need more practise soldering smd.
It sound very very good. Hearing microdetails that l wonder whetherit is my imagination or not.
When music is playing, l hear random low level noise such as switching on and off individual tracks in a multitrack recording. I am uncertain whether this is in the recording or a distortion.
I don't hear this distortion when l pause or stop music. I am using mediamonkey or VLC player
It sound very very good. Hearing microdetails that l wonder whetherit is my imagination or not.
When music is playing, l hear random low level noise such as switching on and off individual tracks in a multitrack recording. I am uncertain whether this is in the recording or a distortion.
I don't hear this distortion when l pause or stop music. I am using mediamonkey or VLC player
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