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Posted by Franc Zabkar on 09/30/42 11:46
On Mon, 24 Apr 2006 21:58:06 -0000, arvak <qft0@lycos_no_spam.com> put
finger to keyboard and composed:
>I have an old samsung dvd-709 player, and it's never had the eeprom
>upgraded. It has a lot of problems with freezing and skipping, and I was
>about to chuck it, but thought maybe I should at least try to upgrade it.
>If it's fixable, the kids can use it. Samsung doesn't seem to acknowledge
>they ever made this now, so if I want it upgraded I'm on my own.
>
>Does anybody have enough details, i.e. an eeprom hex or bin file, and the
>details of the IC required?
>
>I'm comfortable pulling the old chip off the board, so long as its not a bga
>package, and I have a decent device programmer. Looking through the service
>manual for the player, I can see there's a serial EEPROM on it (ssop8), and
>a much larger device, an M28C801 in a 32-pin DIP package. I'm guessing the
>DIP part is the one I want. I'm in Canada, if that helps any with region
>details and/or pal vs. ntsc display.
I'm betting the 8-pin serial EEPROM contains region coding stuff while
the M28C801 (an OTPROM ?) contains the firmware. If the latter is
indeed an OTPROM, then it is not flashable and will need to be
replaced with a pin compatible 1Mx8 (?) device.
That said, freezing and skipping usually indicates a problem with the
laser or the spin motor. Try cleaning the lens with a cotton bud
moistened with water. Avoid pressing too hard so that you don't damage
the focus or tracking coils.
- Franc Zabkar
--
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