Ricoh A250 Service Manual page 547

FCU
6.3 FCU
6.3.1 REMOVAL
Note: If the machine has an optional printer controller installed, remove it before
starting the following procedure.
[A]
1. Remove the rear cover and the left side cover.
2. Remove the FCU bracket [A] (4 screws), then the FCU. (6 screws, 4
connectors)
Turn on SW3 and turn off SW1 on the new FCU.
NOTE: Do not turn off SW3 on the old FCU if you will use it to restore SRAM
data to the new FCU.
3. Go to one of the following procedures:
• To restore SRAM data from the old FCU (if you do not have the latest data
backup) – Go to section 6.3.2.
• To restore SRAM data from a flash memory card backup – Go to section
6.3.3.
6.3.2 SRAM DATA RESTORE FROM FCU
Before restoring the SRAM data, install a new FCU and initialize the SRAM on the
new FCU using the following procedure.
1. Install a new FCU in the machine (see section 6.3.1)
Do not put back the EXFUNC and EXMEM boards yet, if they were present.
2. Turn on the machine. The machine displays "SC1201".
NOTE: The machine always displays "SC1201" the first time a new FCU with
no RAM data is installed. Please ignore it.
3. Press YES to initialize the SRAM.
A250
A891R502.WMF
6-2
17 May, 1999
A891R503.WMF
SM