Ricoh A250 Service Manual page 643

6.3.2 FATAL ERROR
If the controller detected a fatal error during the power-on self-test, it uses two
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).
Flash ROM Error
LED2
(Upper)
LED1
(Lower)
O N
O F F
Turn off the machine and turn it back on. If the controller detects the same error,
download new firmware from a IC card (refer to section 4.5.3). If the problem still
remains, replace the controller.
SDRAM Error
LED2
(Upper)
LED1
(Lower)
O N
O F F
Turn off the machine and turn it back on. If the controller detects the same error,
replace the controller.
CPU Error
LED2
(Upper)
LED1
(Lower)
O N
O F F
Turn off the machine and turn it back on. If the controller detects the same error,
replace the controller.
SM 6-3
LED DISPLAY
B305T502.WMF
B305T503.WMF
B305T504.WMF
A250