Ricoh D158 - Page 272

Service Call Conditions
D158/D159/D160/D161/D170 5-8 SM
No.
Definition
Symptom Possible Cause
120 B
Scanner home position error 1
The scanner home position
sensor does not detect the off
condition during initialization
or copying.
 Scanner home position sensor
 Scanner drive motor
 Scanner home position sensor
connector
 Scanner drive motor connector
 BICU board
121 B
Scanner home position error 2
The scanner home position
sensor does not detect the on
condition during initialization
or copying.
 Scanner home position sensor
 Scanner drive motor
 Scanner home position sensor
connector
 Scanner drive motor connector
 BICU board
141 B
Black level correction error
Black level is over prescribed
rate.
 Defective SBU
 Defective BICU
 Defective harness
142 B
White level correction error
White level is over prescribed
rate.
 Defective SBU
 Defective LED
 Defective LED driver
 Defective BICU
 Defective harness
 Scanner unit condensation
 Dirty scanner mirror or lens
 Dirty platen sheet