Ricoh FT6645 Manual page 355

12 April 1993
1.2 EXPOSURE
SC101 - Exposure lamp malfunction - abnormal On/Off
Definition: [level: A]
During the lamp off condition, the optics control board detects a lamp voltage.
Possible causes
•
Exposure lamp open
•
Triac shorted
•
Exposure lamp thermoswitch open
•
Optics control board defective
SC103 - Power source frequency detection error
Definition: [level: D]
Detects frequencies out of the 45Hz to 65Hz range.
Possible causes:
•
Abnormal power source
•
Electrical noise
•
AC drive board defective
•
Optics control board defective
SC104 - Exposure lamp malfunction - abnormal off
Definition: [level: D]
The scanner start signal is received even if the main relay off condition is
detected.
Possible causes:
•
Main relay defective
•
Communication error between the main control board and the optics
control board because of a poor harness connection.
•
Optics control board defective
1.3 SCANNER
SC120 - Scanner home position sensor abnormal - stays off
Definition: [level: D]
The scanner home position sensor does not detect the on condition even if
the scanner returns home.
Possible causes:
•
Scanner home position sensor defective
•
Optics control board defective
SERVICE CALL CONDITIONS
6-3