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January 2000 © TOSHIBA TEC 4 - 39 FC-22 TROUBLESHOOTING
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CA2 H-SYNC abnormal
Is the polygonal motor rotating?
Refer to CA1 , "Polygonal motor rotation abnormal".
Are both A2 and A3 pins of the connector J166 on the IMC board always at the level "L"?
Refer to CA1 , "Polygonal motor rotation abnormal".
Is the harness between the RLY and IMC boards open-circuited?
Are the connector J166 on the IMC board or the connector J180 on the RLY board discon-
nected?
Replace the harness. Reconnect the connectors.
1. Replace the IMC board.
2. Replace the laser optical unit.
CD1 Laser calibration error (K)
CD2 Laser calibration error (C)
CD3 Laser calibration error (M)
CD4 Laser calibration error (Y)
1. Check if the harness between the IMC and RLY boards is open-circuited.
2. Check if the connector J162 on the IMC board is disconnected.
3. Check if the connector J178 on the RLY board is disconnected.
4. Check if the harness between the RLY board and the switching power supply is open-circuited.
5. Check if the connector J179 on the RLY board is disconnected.
6. Check if the connector J161 on the IMC board is disconnected.
7. Check the switching power supply if the connector J705 or J707 is disconnected.
8. Check the RLY board if the harness of the connector J174 (Y), J175 (M), J176 (C) or J177 (K) is
open-circuited.
9. Replace the IMC board.
10. Replace the laser optical unit.
YES
NO
YES
NO
YES
NO