SELF-DIAGNOSTIC MODE
B156/B220 4-20
SM
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
Font Header Check
Optional NVRAM Check
Real Time Clock Check
Network Check
Engine I/F Check
Interrupt Check
Memory Chip Check
Power-on or
Detailed
ROM Sum Check
Standard RAM Detailed
Check
Optional RAM Detailed
Check
Standard NVRAM
Detailed Check
Optional NVRAM
Detailed Check
Optinoal HDD Check
IEEE1284 Loop-back
Check
Real Time Clock
Detailed Check
Font ROM Sum Check
END
Power-on
Detailed
NG
SC821
NG
SC820
NG
SC838
NG
SC826
NG
SC828
NG
SC829
NG
SC826
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
A
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
NG
Error Logged
A
NG
Not initialized
NG
SC829
NG
SC827
NG
SC824
NG
Not use optional RAM
Error Logged
NG
Error Logged
B156T501.WMF
Summary of Contents for B156
Page 1: ...B156 B220 SERVICE MANUAL 002350MIU...
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Page 5: ...B156 B220 SERVICE MANUAL 002350MIU...
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Page 27: ...INSTALLATION...
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Page 103: ...PREVENTIVE MAINTENANCE...
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Page 111: ...REPLACEMENT AND ADJUSTMENT...
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Page 116: ...SCANNER UNIT B156 B220 3 4 SM B156R999 JPG...
Page 189: ...TROUBLESHOOTING...
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Page 227: ...SERVICE TABLES...
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Page 365: ...DETAILED DESCRIPTIONS...
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Page 449: ...SPECIFICATIONS...
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