Ricoh D131 Service Manual page 472

Scanner home position error 2
D
The scanner HP sensor does not detect the ON condition during
initialization or copying.

BCU, SIOB defective
SC121

Scanner motor defective

Scanner HP sensor defective
-

Harness between BCU, SIOB, scanner motor disconnected

Harness between scanner HP sensor and BCU disconnected

Scanner wire, timing belt, pulley or carriage installed incorrectly.
Black level detection error
The black level cannot be adjusted within the target during auto gain
control.

Harness between SBU – SIOB is disconnected.

Harness between SIOB – BCU is disconnected.
SC141 D

Defective SBU

Defective BCU

Check the SBU-SIOB/SIOB-BCU harness connections or replace
these harnesses.

Replace the SBU.

Replace the BCU
SM Appendix 2-5
SC100: Scanning
D131/D132/D133