Marantz 1040 amplifier / Empty fuse socket ?
I have found an empty fuse socket (1A) inside my second hand Marantz 1040 amplifier.
I have owned it for the past 15 years. The sound is great, particularly when I play CDs. However, depending on vinyls, the sound is sometimes a bit distorted in the bass. (I use a project Debut carbon Esprit SB turntable with an Ortofon 2m red cartridge). I recently opened my amplifier chassis in order to try to clean the connectics. In particular, the volume knob crackles a bit. In the process, I noticed, that one of the four fuse sockets, located directly behind the volume knob, is indeed empty. The pattern is as follows "Fuse : 2A (fuse present), 1A (fuse present), 1A (No fuse in the socket), 1A (fuse present)". I am wondering whether this is normal or whether a dead fuse was never replaced by the previous owner. Can anyone help on the matter ? I have no skills in electronics and a bit wary that adding an unfit extra 1A fuse might damage my sound system, or even much worse set it on fire or so. No sure whether I can send a picture of the device on this website ?
Thanks a lot for any comment, help or answer.