Ricoh A250 Service Manual page 25

6.2 NCU AND SPEAKER................................................................................ 6-1
6.3 FCU .......................................................................................................... 6-2
6.3.1 REMOVAL ....................................................................................... 6-2
6.3.2 SRAM DATA RESTORE FROM FCU .............................................. 6-2
6.3.3 SRAM DATA RESTORE FROM FLASH CARD BACKUP ............... 6-4
6.4 FIRMWARE UPDATE............................................................................... 6-6
6.4.1 FCU FIRMWARE DOWNLOAD ....................................................... 6-6
6.4.2 FCU ROM UPLOAD......................................................................... 6-8
6.5 SRAM DATA BACKUP AND RESTORE ................................................ 6-10
6.5.1 SRAM BACKUP TO A FLASH MEMORY CARD ........................... 6-10
6.5.2 SRAM RESTORE FROM A FLASH MEMORY CARD................... 6-11
7. TROUBLESHOOTING.................................................................. 7-1
7.1 ERROR CODES ....................................................................................... 7-1
7.2 FAX SC CODES ..................................................................................... 7-10
7.2.1 OVERVIEW.................................................................................... 7-10
7.2.2 SC1201 .......................................................................................... 7-10
7.2.3 SC1207 .......................................................................................... 7-10
7.2.4 FAX SC CODE TABLE .................................................................. 7-11
7.3 ROM HISTORY....................................................................................... 7-12
7.3.1 ROM HISTORY – A891 ................................................................. 7-12
SM iii
Rev. 02/2000
A250