cros wrote: ↑Wed Dec 08, 2021 5:42 pm
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When I got my current vehicle it had its original radio cassette so I eventually replaced it with this Blaupunkt. Even with very little use it soon packed up so I removed it to have a look inside. Problem solved, they forgot to put the works in there. Utter garbage.
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What's wrong with not having much in? As semiconductor node sizes shrink and become economical to make, more now can be consolidated into single devices.
Heatsink part is the speaker driver (probably containing the overload protection already). Right hand IC by the antenna connection is the combined FM/AM and possibly DAB receiver with almost all the associated (previously bulky) analogue circuitry. Left hand side is mostly power supply. Middle CSC2313F part is the sound processor that takes various audio sources and does things like volume/fading/switching/etc. The part with the H on is the main processor - this does the display interface and very likely the Bluetooth functionality all in one chip. Then there will be a EEPROM for memory storage. Finally there maybe another IC in the display that does the screen driving.
Older radios would have multiple parts to do each function. E.g. instead of that single audio processing chip, it would have analogue circuitry to switch the inputs, another set for volume, another for fading, another for balance, etc, etc.
Also a lot of room is saved by not having the
physical mechanical mechanism of a CD or Tape player.
Basically this is why these are like £50 now, not £150. Might be disappointing to look at the empty space but most people don't open them. Those that don't would be more disappointed if they open the cardboard box to find it was only a couple centimetres thick.
