LED DISPLAY
SM 2-3 B441
Printer Unit
B441
2.2.2 FATAL ERROR
If the controller detected a fatal error during the Power-On Self-Test, it uses 2
LEDs to notify the cause of the error.
If one of the following fatal errors happens, the LED status changes as shown
(read from the left of the diagram to the right).
Code ROM Error
Turn off the machine and turn it back on. If the controller detects the same error,
replace the controller.
Resident RAM Error
Turn off the machine and turn it back on. If the controller detects the same error,
replace the controller.
CPU Error
Turn off the machine and turn it back on. If the controller detects the same error,
replace the controller.
LED2
(Upper)
LED`1
(Lower)
: ON
: OFF
B441T502.WMF
LED2
(Upper)
LED1
(Lower)
: ON
: OFF
B441T503.WMF
LED2
(Upper)
LED1
(Lower)
: ON
: OFF
B441T504.WMF
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