Why do electronics actually need to be serviced?

Because all electronic devices and systems, even those found on the international space station for example, contain parts that change, wear, need periodic cleaning, lubrication and adjustment.

When you add in mechanical systems like the levers, switches, belts, pulleys and connectors found in many types of hi-fi gear, you have a combination of parts and systems that wear and need periodic attention and maintenance, over time. Proper periodic maintenance prevents premature failure, improves performance and reliability and therefore enjoyment of your equipment.

It’s a strange quirk of human nature that we sometimes purchase things and expect that they will just keep running without attention. This isn’t even true even for a kettle, let alone complex equipment like turntables and amplifiers. Don’t even get me started on cassette decks!

Mechanical linkages, pulleys, gears, idlers, pinch rollers and motors need cleaning and lubrication and this is fairly easily understood. But electronic parts also change over time, most notably electrolytic capacitors, some semiconductors and resistors.

It requires a really careful eye and lots of experience to know where to look, what to look for and how to correctly service each of these types of electronic and mechanical parts and systems. One thing is for certain, your hi-fi equipment will need money spent on maintenance if it is to keep running reliably.