Power On Self-Test; Controller Self-Diagnostic; Overview - Ricoh G092 Service Manual

5.5 POWER ON SELF-TEST

5.5.1 CONTROLLER SELF-DIAGNOSTIC

Overview

There are three types of self-diagnostics for the controller.
• Power-on self-diagnostics: The machine automatically starts the self-diagnostics
just after the power has been turned on.
• Detailed self-diagnostics: The machine does the detailed self-diagnostics by
using a loop-back connector (P/N G0219350)
• SC detection: The machine automatically detects SC conditions at power-on or
during operation.
The following shows the workflow of the power-on and detailed self-diagnostics.
Power ON
Diagnostic RAM Check
CPU Check
ASIC Check
Standard RAM
Conection Check
Optional RAM
Connection Check
Clock Generator Check
Standard NVRAM
Check
Optional NVRAM Check
Font Header Check
Real Time Clock Check
Network Check
Engine I/F Check
Interrupt Check
Memory Chip Check
A
SM
Not initialized
NG Power-on or
SC820
NG
ROM Sum Check
SC821
NG
Standard RAM Detailed
SC827
NG
Optional RAM Detailed
SC829
NG
Standard NVRAM
Detailed Check
SC838
NG
Optional NVRAM
Detailed Check
SC824
NG
Optinoal HDD Check
NG
Error Logged IEEE1284 Loop-back
NG
Error Logged Real Time Clock
Detailed Check
SC826
NG
Font ROM Sum Check
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
5-33
POWER ON SELF-TEST
A
Detailed
Detailed
SC828
NG
SC829
NG
Check
NG
Check
Not use optional RAM
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Check
Error Logged
SC826
NG
NG
Error Logged
END
G081S516.WMF
Power-on
G081/G092