Self-Diagnostic Mode; Overview - Ricoh B051 Service Manual

SELF-DIAGNOSTIC MODE

4.2 SELF-DIAGNOSTIC MODE

4.2.1 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
B051/B052
CÓPIA NÃO CONTROLADA
Not initialized
NG
SC820
NG
SC821
NG
Standard RAM Detailed
SC827
NG
Optional RAM Detailed
SC829
NG
SC838
NG
SC824
NG
NG
Error Logged
NG
Error Logged
SC826
NG
Font ROM Sum Check
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
4-18
CÓPIA NÃO CONTROLADA
A
Power-on or
Detailed
Detailed
ROM Sum Check
NG
NG
Check
NG
Check
Error Logged
Standard NVRAM
NG
Detailed Check
Error Logged
Optional NVRAM
NG
Detailed Check
Error Logged
Optinoal HDD Check
NG
Error Logged
IEEE1284 Loop-back
NG
Check
Error Logged
Real Time Clock
NG
Detailed Check
NG
Error Logged
END
SC828
SC829
Not use optional RAM
Power-on
SC826
B051T516.WMF
SM