Sc Table - Ricoh TH-C1b Service Manual

SERVICE CALL

4.1.2 SC TABLE

No.
Definition
101 D Exposure lamp error
The standard white level is not
properly detected when scanning the
shading plate. (The shading data
peak does not reach the specified
threshold.)
120 D Scanner home position error 1
• The scanner home position sensor
does not detect the "off" condition
during scanning.
• The scanner home position sensor
does not detect the "off" condition
during initialization.
121 D Scanner home position error 2
• The scanner home position sensor
does not detect the "on" condition
during initialization.
• The scanner home position sensor
does not detect the "on" condition
when starting to scan.
• The scanner home position sensor
does not detect the "on" condition
when the scanner returns.
142 D White level detection error
The white level cannot be adjusted
within the target during auto gain
control.
144 D SBU communication error
The operation software version for the
SBU does not match the installed
SBU.
Symptom
4-2
Possible Cause
• Exposure lamp defective
• Lamp stabilizer defective
• Exposure lamp connector defective
• Standard white plate dirty
• Scanner mirror or scanner lens out of
position or dirty
• SBU defective
• Scanner I/O board or SBU defective
• Scanner motor defective
• Harness between scanner I/O board
and scanner motor disconnected
• Scanner HP sensor defective
• Harness between SBU and HP sensor
disconnected
• Scanner wire, timing belt, pulley, or
carriage defective
• Scanner I/O board or SBU defective
• Scanner motor defective
• Harness between scanner I/O board
and scanner motor disconnected
• Scanner HP sensor defective
• Harness between SBU and HP sensor
disconnected
• Scanner wire, timing belt, pulley, or
carriage defective
• Dirty exposure glass or optics section
• SBU board defective
• BICU board defective
• Exposure lamp defective
• Lamp stabilizer defective
• Update the BICU software.
• Replace the SBU.
10 February 2005