Może tu: http://hamradio.online.ru/ftp3/All_YAESU_mods_from_mods_dk_in_ONE_file.pdf FT-757 "The Display became dimmer more and more". Q01/Q4001 2SC496Y.
http://www.albinarrate.com/index.php?option=com_content&task=view&id=18&Itemid=30
http://www.albinarrate.com/index.php?option=com_content&task=view&id=18&Itemid=30