restoring a Pioneer F90, is this component bad?

Vintage Asylum

Classic gear from yesteryear; vintage audio standing the test of time.

I like the sound of the F90 but every 20 minutes or so it produces a medium loud "popping" sound.
So I went ahead and purchased a cap/transistor replacement kit from a guy in Australia(!). Although I haven't checked the kit, I doubt it includes the component shown in the pic, which is the only component that looks bad visually to me.
I guess that will be the first test for my new Hakka desoldering vacuum.
Diode I guess? I have the service manual but I am not trained in electronics and this schematic is a bit complicated for me, I am really just a DEOXIT technician :)
Can anyone advise? Certainly looks bad. It is not broken or crumbly, just has that ugly crust on it.
I do have schematics in the sm I could photograph...

Edits: 01/14/24

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Topic - restoring a Pioneer F90, is this component bad? - ltman 14:57:31 01/14/24 (5)

Funky Looking Component - Triode_Kingdom 07:09:10 01/15/24 (1)

RE: Funky Looking Component - ltman 10:24:47 01/15/24 (0)

RE: close up of the part - ltman 15:51:47 01/14/24 (2)

Given that it's a tuner... - 1973shovel 03:13:21 01/15/24 (1)

RE: Given that it's a tuner... - ltman 10:08:26 01/15/24 (0)

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