Ricoh B089 Service Manual page 424

SELF-DIAGNOSTIC MODE
7.2 SELF-DIAGNOSTIC MODE
7.2.1 SELF-DIAGNOSTIC MODE AT POWER ON
As soon as the main machine is powered on, the controller waits for the initial
settings of the copy engine to take effect and then starts an independent self-
diagnostic test program. The self-diagnostic test follows the path of the flow chart
shown below and checks the CPU, memory, HDD, and so on. An SC code is
displayed in the touch panel if the self-diagnostic program detects any malfunction
or abnormal condition.
Self-Diagnostic Test Flow
B089/B093
Power On
Initialization
Memory Check for
Self-Diagnostic Test
Self-Diagnostic
Mode Selection
CPU Check
ASIC Check
Memory Check
Program ROM,
DIMM CRC Check
SSCG Check
OPC Check
NVRAM Check
HDD Check
IEEE1284
I/F Check
Font ROM Check
RTC Check
IC Card
I/FCheck
Network Check
Engine I/F Check
Illegal Interrupt
Check
System OS,
Application Check
B089T900.WMF
7-16 SM