Service manual

HARDWARE OVERVIEW
B358 2-2 SM
3. ROM memory
1) Flash ROM (4 Mbytes)
This flash ROM includes boot code, operation system code, PCL5e codes,
PCL6 code, and font data for both PCL languages (resident fonts).
2) ROM SIMM (4 Mbytes for the PostScript option)
This ROM SIMM includes the PostScript code and PostScript font data.
4. NVRAM (8 Kbytes)
This NVRAM contains the printer settings, job record data, and error record
data.
5. Network Interface Board Interface
This controls the optional network interface board, and printer MIB is provided
to support the network operations.
6. Hard Disk Drive Interface (Enhanced IDE)
This HDD interface is provided to support storage of fonts downloaded from a
PC.
7. Flash Memory Card Interface
The flash memory card for updating the controller and PostScript firmware is
connected to this flash memory card slot.
8. Power-on Self Diagnostic
When the controller is turned on, the controller performs a self diagnostic test.