Hi Tadad1,
the firmare i got from :
http://www.s1mp3.org/en/downloads_fw.php
File Name : 693SCL-org.7z
Working Broad : MP-693 CSL V1.2
Version : V3.5.35
I have try using this firmwarn but failed.
File Name : dump-MP-693C-SL.7z
working Board : MP_693C-SL Main V1.3
Version : 3.5.35