Ricoh FT4460, Service Manual, Page: 75 / 413

28 February 1989
3.13 SERVICE CALL CONDITIONS
Self Diagnostic Code 11:
Code 11 is displayed if a lamp circuit malfunction is detected during standby
(lamp ON), or if the lamp filament or thermal switch opens.
Self Diagnostic Code 12:
Exposure Lamp Malfunction
Code 12 is displayed if the lamp circuit malfunctions (stays ON), or if the lamp
filament or thermal switch opens for longer than 20 seconds during a copy
cycle.
Self Diagnostic Code 21:
Scanner Malfunction
Code 21 is displayed if the 1st scanner home position sensor is not actuated
within 6 seconds (scanner does not return home).
Self Diagnostic Code 22:
Scanner Malfunction
Code 22 is displayed if the 1st scanner home position sensor remains ac-
tuated (OFF) during the initialization.
Self Diagnostic Code 23:
Code 23 is displayed if the I/O control board does not receive the registration
start signal within 4.9 seconds after the scanner starts.
Self Diagnostic Code 24:
No Scanner Home Position Signal
Code 24 is displayed if the I/O control board does not detect the home posi-
tion signal within 20 seconds after the scanner starts. (The scanner does not
return to the home position.)
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