Jolida JD100 winbond chip & 220v to 110v questions

Archived from groups: rec.audio.high-end (More info?)

tony@thsoftware.com wrote:
> Hi,
>
> In pictures of the tube output of the Jolida CD player, I see a winbond
> chip. Isn't this Winbond chip used in computers for I/O? Does anyone
> know what this chip is used for in the Jolida CD player?
>
> Also, could a 220volt model of the Jolida JD100 player work in the US
> with a simple modification of the player? I assume the player sold in
> 220V countries is the same one as the one in 110V countries, except the
> transformer is wired up differently, right? Or do they use different
> parts? The reason I'm asking is because I have found a good offer on a
> used 220Volt unit. Thanks!
>
> - Tony

My guess is that the Winbond chip is an EEPROM (electrically erasable
and programmable read-only-memory) that holds the firmware, i.e., the
programs that run the CD player. Similar to a BIOS chip on a motherboard.