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December 2002 TOSHIBA TEC 4 - 39 e-STUDIO160/200/250 TROUBLESHOOTING
4.1.10 Optical system service call
C21 Carriage initialization error
Is the wire or belt inside the scanner unit broken? Does the wire or belt inside the scanner unit
unfasten?
Replace the wire or belt.
When the original glass is removed and the carriage is moved to the center, does the drive
system operate abnormally, such as racing or getting stuck?
Repair or replace the drive system.
Does the carriage move to the home position when the power is turned on?
1. Check if the home position sensor is not properly installed.
2. Check if the connector of the home position sensor is disconnected.
3. Check if the connector pin is removed or the harness is disconnected.
4. Check if any conductor pattern on the scanner control PWA is open- or short-
circuited.
5. Replace the home position sensor.
6. Replace the scanner control PWA.
7. Replace the main PWA.
1. Check if the scanner motor cable is damaged, short-circuited, or the connector pin is re-
moved.
2. Check if any conductor pattern on the scanner control PWA is open- or short-circuited.
3. Replace the scanner motor.
4. Replace the scanner control PWA.
5. Replace the main PWA.
YES
NO
YES
NO
YES
NO