Marantz Model 140 power amp.

Marantz Model 140 power amp has a loud hum on one side. Anyone know what might be going on and would it be worth fixing?

manowar196603-31-2018 4:55pm

Post removed Apr 07, 2018
manowar1966 OP Details Discussions Posts This discussion Message User 1 posts 04-08-2018 at 04:44pm Copy Comment URL Report Comment Edit Delete Well I took the cover off and you will not believe what I found. Don't know if it is the prob but I found a fuse supposed to be 4 amp 250 volt but whoever had this amp b4 me had the wrong fuse in it it was blown and they had the silver gum wrapper wrapped around it. Could that be my prob?
Post removed Apr 08, 2018
jasonbourne52 Details Discussions Posts This discussion Message User 2,863 posts 01-20-2023 at 11:31am Copy Comment URL Report Comment Edit Delete Replace the fuse, power it on and see if it blows. If it's OK but the hum is still there in one channel it is likely the power supply cap/caps for that channel. An easy fix! Buy similar caps and replace all the old ones in both channels. Some soldering is required.