Has anyone had any joy silencing these supplies?
I don't know if they buzz from new but glue on almost every through hole component do not ooze any confidence.
If i put a wooden chopstick like stick on C806 (picture 4) the buzzing gets noticeably louder without having to put your ear on the stick.
Now i don't have any schematics or do i know enough about PSU design to work out what value it should be so i changed all the through hole diodes and the standby cap but not the 2 little caps on the left side of picture 3 and the buzzing continues.
R803A, B and C all test ok @ 33k and R801 @ 100k
Other than the 2 small caps on the topside that i have not yet changed where do i go next?
I don't know if they buzz from new but glue on almost every through hole component do not ooze any confidence.
If i put a wooden chopstick like stick on C806 (picture 4) the buzzing gets noticeably louder without having to put your ear on the stick.
Now i don't have any schematics or do i know enough about PSU design to work out what value it should be so i changed all the through hole diodes and the standby cap but not the 2 little caps on the left side of picture 3 and the buzzing continues.
R803A, B and C all test ok @ 33k and R801 @ 100k
Other than the 2 small caps on the topside that i have not yet changed where do i go next?
Attached Files
Comment