Service manual

Service Call Conditions
SM 6-3 M052/M053/M054
Trouble-
shooting
SC1xx: Scanning
101 D
Exposure lamp error 1
The standard white level setting dropped below the specified range during
scanning.
 White plate dirty
 Spurious electrical noise on power supply line
 Exposure lamp connection loose, broken, defective
 Exposure lamp defective
 Lamp stabilizer connection, loose, broken, defective
 Lamp stabilizer defective
 High voltage power supply harness loose, broken, defective
 SBU defective
 BCU defective
 SIO defective
120 D
Scanner home position error 1
The scanner HP sensor did not turn off during scanner initialization or
copying.
121 D
Scanner home position error 2
The scanner HP sensor did not turn on during scanner initialization or
copying.
 Scanner motor harness loose, broken, defective at scanner motor or
at BCU
 Scanner HP sensor harness, loose, broken, defective at HP sensor or
at BICU
 Scanner motor or motor driver board defective
 Scanner motor drive board defective
 Scanner HP sensor defective