Yamaha mc1602 mixer repair

This vintage Yamaha mc1602 mixer was brought in by a friend. Some of its channels didn't work properly and most of the control pots were scratchy or even unusable. The previous owner claimed that the mixer had been thoroughly cleaned. Still, I found quite a lot of dust inside the board, on its back cover and on the pots. First I removed the dust with a piece of cloth and then sprayed the PCBs with compressed air. The pots and jacks were cleaned with contact cleaner spray, one by one to ensure all dust and filth was removed. Luckily, the pots of this mixer are classic open type metallic "guitar" pots, not cheap plastic closed type ones. The pots are not scratchy anymore but there were still a few issues with the VU meters and switches. I noticed that one of the four internal fuses was not making a good contact. I replaced the fuse and tightened up its holder with a pair of pliers. The mixer is now back in service and everything works as it should! What a classic sound it produces!

For more info, check this manual out:  http://lcweb2.loc.gov/master/mbrs/recording_preservation/manuals/Yamaha%20MC802%3B%20MC1202%3B%20MC1602.pdf

Cheers,

Thanos