Sharp AR-810 Manual do Utilizador descarregar pdf (Página 76)

AR-651/810 TROUBLE SHOOTING 5 - 76

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

[CA1] Abnormal polygonal motor

Is the polygonal motor rotating?

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.

YES

Are the pins-3 and -4 of the connector J203 on the POL board always level “L”?

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.

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

Replace the harness. Connect the disconnected connectors.

1. Replace the LGC board.

2. Replace the laser optical unit.

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Sharp AR-810 Manual do Utilizador Página 76