Laser Optical Unit Related Service Call; Abnormal Polygonal Motor; Is The Polygonal Motor Rotating?; H-Sync Detection Error - Toshiba e-STUDIO650 Service Handbook

5. 1. 13. Laser optical unit related service call

[CA1] Abnormal polygonal motor

Is the polygonal motor rotating?

NO
YES
Are the pins-3 and -4 of the connector J203 on the POL board always level "L"?
NO
YES
1. Check if the conductor pattern on the LGC board is short- or open-circuited.
2. Replace the LGC board.
[CA2] H-Sync detection error
Are the harness connecting the connector (J308) on the LGC board and connector (J202) on the
SNS board open-circuited? Are the connectors disconnected?
YES
NO
1. Replace the LGC board.
2. Replace the laser optical unit.
e-STUDIO550/650/810 TROUBLE SHOOTING
1. Check if the connector J302 on the LGC board is disconnected.
2. Check if the connector J203 on the POL board is disconnected.
3. Check if the harness is open-circuited and the connector pin is disconnected.
4. Check if the conductor pattern on the LGC board is short- or open-circuited.
5. Replace the laser optical unit.
6. Replace the LGC board.
1. Check if the conductor pattern on the LGC board is short- or open-circuited.
2. Replace the laser optical unit.
3. Replace the LGC board.
Replace the harness. Connect the disconnected connectors.
5 - 76 JUNE 2002 © TOSHIBA TEC