Self-Diagnostic Mode; Self-Diagnostic Mode At Power On; Self-Diagnostic Test Flow - Ricoh A-P3 Service Manual

6 November, 2001

5.5 SELF-DIAGNOSTIC MODE

5.5.1 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

Power On
RAM Check*
CPU Check
ASIC Check
Resident RAM
Connection
Optional RAM
Connection
Generator
NV-RAM
Font ROM
Network
Interface
Allocation
Detailed Self-
Diag. Mode?
NO
Self-Diag. End
* Checks only the area used by
the self-diagnostic test.
NG: SC820
NG: SC821
NG: SC827
Check
NG: SC829
Check
Clock
NG: SC838
Check
NG: SC824
Check
Header
Check
Check
Check
YES
SELF-DIAGNOSTIC MODE
Detailed Self-Diagnosis
ROM Device
CRC Check
Resident
RAM Total
Area Check
Optional
RAM Total
Area Check
NVRAM
Total Area
Check
HDD Check
IEEE1284
Loop-back
Check
Font ROM
CRC Check
Detailed Self-
Diag. End
5-41
NG: SC828
NG: SC829
G065S903.WMF