I just repaired this T4000, replaced all of the power supply FETs, drivers, and 10 FETS in the output. The amp is running, plenty of power but have a whine. Sounds like it is coming from 1 of the coils in the power supply.
On the bench with no input, I can hear the whine and when connecting a speaker, the whine can be heard at the speaker. The whine is constant and does not change even when an adjustment is made to the amp. Regular audio comes through but the whine is still there and does not change with volume adjustment.
Anyone have this problem with an RF in the past?
On the bench with no input, I can hear the whine and when connecting a speaker, the whine can be heard at the speaker. The whine is constant and does not change even when an adjustment is made to the amp. Regular audio comes through but the whine is still there and does not change with volume adjustment.
Anyone have this problem with an RF in the past?