• Code: CA20
• Description: H-sync detection error: Laser beam cannot be detected at the SNS board.
• Remedy: Is the harness connecting the connector (J207) on the PLG board and the connector on the LDR1 board open circuited? Are the connectors damaged or disconnected? Is the harness connecting the connector (CN202) on the PLG board and the connector on the SNS board open circuited? Are the connectors damaged or disconnected? (e-STUDIO850) Is the harness connecting the connector (J207) on the PLG board and the connector on the LDR1 board open circuited? Are the connectors damaged or disconnected? Is the harness connecting the connector (J208) on the PLG board and the connector on the LDR1 board open circuited? Are the connectors damaged or disconnected? Is the harness connecting the connector (J210) on the PLG board and the connector on the SNS board open circuited? Are the connectors damaged or disconnected? ↓ → NO. (e-STUDIO520,e-STUDIO600,e-STUDIO720) 1) Replace the harness. Reconnect the connector. 2) Check if the connector(J207) on PLG board hold the harness securely? 3) Check if the following signals are transmitted on the pin of the connector( CN1) on the PLG board? Pin 1: 5V, Pin 3: 0V 4) Replace the laser optical unit. (e-STUDIO850) 1) Replace the harness. Reconnect the connector. 2) Check if the connector(J207,J208) on PLG board hold the harness securely? 3) Replace the laser optical unit. YES 1) Check if the conductor pattern on the PLG board is short circuited or open circuited. 2) Check if the grounding wire of the high-voltage unit (e.g. developer unit, transfer unit) is grounded securely. 3) Check if the bias contact point of the high-voltage unit is contacted securely. (Check if the point is not stained either.) 4) Check if the metal plates of the transport system are grounded securely. 5) Check if the equipment is grounded securely? 6) Replace the laser optical unit.

• Code: CA30
• Description: Secondary scanning coarse adjustment error [e-STUDIO850]
• Remedy: Is any harness between the PLG board and galvanic mirror, PLG board and laser drive PC board and PLG board and H-Sync detection PC board open circuited or any connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the laser optical unit.

• Code: CA41
• Description: Window comparator abnormality (error during secondary scanning control) [e-STUDIO850
• Remedy: Is any harness between the PLG board and galvanic mirror, PLG board and laser drive PC board and PLG board and H-Sync detection PC board open circuited or any connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the laser optical unit.

• Code: CA42
• Description: Sensor signal busy error (error during secondary scanning control) [e-STUDIO850]
• Remedy: Is any harness between the PLG board and galvanic mirror, PLG board and laser drive PC board and PLG board and H-Sync detection PC board open circuited or any connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the laser optical unit.

• Code: CA43
• Description: Comparator abnormality [e-STUDIO850]
• Remedy: Is any harness between the PLG board and galvanic mirror, PLG board and laser drive PC board and PLG board and H-Sync detection PC board open circuited or any connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the laser optical unit.

• Code: CA44
• Description: Beam sensor detection error [e-STUDIO850]
• Remedy: Is any harness between the PLG board and galvanic mirror, PLG board and laser drive PC board and PLG board and H-Sync detection PC board open circuited or any connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the laser optical unit.

• Code: CA50
• Description: Laser power adjustment error [e-STUDIO850]
• Remedy: Is any harness between the PLG board and galvanic mirror, PLG board and laser drive PC board and PLG board and H-Sync detection PC board open circuited or any connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the laser optical unit.

• Code: CA90
• Description: Image data transmission error of SYS board: Communication error has occurred between the PLG board and the SYS board.
• Remedy: Is the harness between the PLG board and SYS board open-circuited or the connector disconnected? → YES . Replace the harness. Reconnect the connector. NO 1) Replace the PLG board. 2) Replace the SYS board.