Main Unit (Sensor)

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 1 | Paper Eject Tray Full Front Detection Sensor | EJ | Detects the full stack of the Tray. | Remote type photo interrupter | Paper Eject Tray Full Front Detection Sensor |
| 2 | Font Cover Sensor | Main Unit | Detects opening and closing states of the front cover. | Mechanical contacts | Front Cover Sensor |
| 3 | PG HP Sensor | Motion | Detects the home position for the APG. | Transmission type photo interrupter | --- |
| 4 | Right Cover Sensor | MP/DUP | Detects the open/closed state of the Right Door Unit. | Mechanical contacts | Right Cover Sensor |
| 5 | Inter-Lock Switch | MP/DUP | Stops the printer while the Right Door Unit is opened | Interlock Switch | Inter-Lock Switch |
| 6 | Maintenance Box CSIC | IS | Detects the insertion state of the Maintenance Box | CSIC | Ink System Unit |
| 7 | Maintenance Box Full Sensor | IS | Detects the full waste of the Maintenance box. | Reflective photo interrupter |

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 8 | C1 Paper Size/Width Sensor | ASF | Detects the edge guide position of the cassette to judge the size of the loaded paper.(Judge the paper width at the end guide position) | Mechanical contacts | C1 Paper Size/Cassette Sensor |
| 9 | C1 Cassette Sensor | ASF | Detects the insertion state of the Paper cassette. | ||
| 10 | C1 Lift Up Motor Control Sensor | ASF | Detects a near-end state of paper in the Paper cassette by detecting the position of the lever that moves with the hopper. | Transmission type photo interrupter | C1 Liftup Motor Assy |
| 11 | C1 Lift Up Upper Limit Sensor | ASF | Detects whether paper is present or not in the paper cassette by the position of the lever of C2 Paper Pickup Unit. | ||
| 12 | Ink Leak Sensor 6 | Main Unit | Detects the ink leakage from the Ink path. | Analog sensor | --- |

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 13 | MP Tray Paper Sensor | MP | Detects whether paper is present or not in the MP Tray. | Reflective photo interrupter | MP Tray Paper Sensor |
| 14 | MP Tray Paper Width/Size Sensor | MP | Detects the width and size of the paper loaded in the MP Tray. | Mechanical contacts | Paper Tray Assy |


| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 15 | Post-Reversing Paper Feed Sensor | DUP | Detects whether or not there is paper around the Reversal Roller. | Reflective photo interrupter | Post-Reversing Paper Feed Sensor |
| 16 | Duplex Paper Feed Sensor | DUP |
Detects whether paper is present or not near the Duplex Roller. | Reflective photo interrupter | Duplex Paper Feed Sensor |
| 17 | HP Sensor, MP Tray | MP | Detects the HP of MP Tray to control the Hopper. | Transmission type photo interrupter | MP Tray HP Sensor |
| 18 | C1 Paper Feed Sensor | ASF | Detects the top edge of the paper around the Paper Feed Roller 1. | Reflective photo interrupter | C1 Paper Feed Sensor |
| 19 | C1 Paper Sensor | ASF | Detects whether paper is present or not in the paper cassette by the position of the lever of C1 Paper Pickup Unit. | Transmission type photo interrupter | C1 Pickup Unit |
| 20 | C1 Paper Near-End Sensor | ASF | Detects a near-end state of paper in the Paper cassette by detecting the position of the lever that moves with the hopper. | Transmission type photo interrupter |


| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 21 | Temp./Humidity Sensor | Main Unit | Measures temp/humidity to set the appropriate drying time. | Analog sensor | Temp/ Humidity Sensor |
| 22 | Printing Encoder HP Sensor | PF | Detects the home position for the Printing Encoder. | Transmission type photo interrupter | Belt unit |
| 23 | Belt Cleaner Positioning Sensor | PF | Detects the belt cleaner control position. | Transmission type photo interrupter | |
| 24 | Belt Tension Release HP Sensor | ASF | Detects the home position for driving the Belt Tension Release Motor. | Transmission type photo interrupter | |
| 25 | Belt Cleaner Positioning Sensor | ASF | Detects the home position for the Belt Cleaner. | Transmission type photo interrupter | |
| 26 | PW Sensor | ASF | Detects the width of the paper. | Reflective photo interrupter | PW sensor unit |
| 27 | PW Carriage HP Sensor | ASF | Detects the Paper Width Sensor Carriage is at home position. |
Transmission type photo interrupter |


| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 28 | Tray Pre-Eject Sensor | EJ | Detects whether paper is present or not just before the paper ejection roller that ejects paper to the Face-down output tray. | Reflective photo interrupter | EJ Unit Assy |
| 29 | Post-Belt Sensor | PF | Detects the present or not immediately after paper passed through the Belt Unit. | Reflective photo interrupter | Post-Head Paper Guide Assy |
| 30 | Post-Head Paper Sensor | PF | Detects the present or not immediately after paper passed through the Head Unit. | Reflective photo interrupter | |
| 31 | Pre-Head Paper Sensor | PF | Detects the present or not immediately before paper passed through the Head Unit. | Reflective photo interrupter | Anti Static Brush |
| 32 | Pre-Printing Sensor | ASF | To control start of printing, detects whether paper is near the head or not, and detects the paper top edge. | Reflective photo interrupter |

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 33 | Head APG Cam Touch Sensor 1(Front) | Motion | Detects that the Head Unit has moved to the arrow position. | Transmission type photo interrupter | Head APG Cam Touch Sensor |
| 34 | Head APG Cam Touch Sensor 2(Rear) |

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 35 | Tray Full Upper Detection Sensor | EJ | Detects the full stack of the Tray. | Remote type photo interrupter | Tray Full Upper Detection Sensor |
| 36 | Head HP Sensor | Motion | Controls the Head Unit Up/Down by detecting the HP of the Head Unit. | Transmission type photo interrupter | Head HP Sensor |
| 37 | HP Sensor, Wiper | Motion | Detects the wiper unit HP and controls the drive of the wiper unit. | Transmission type photo interrupter | Wiper HP Sensor |
| 38 | HP Sensor, Cap | Motion | Detects the cap unit HP and controls the drive of the cap unit. | Transmission type photo interrupter | Cap HP Sensor |

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 39 | Pressure Sensor | IS | Detects positive and negative pressure. | Analog sensor | Ink System Unit |
| 40 | CSIC K | Detects the insertion state of ink cartridges. | CSIC | ||
| 41 | CSIC Y | ||||
| 42 | CSIC M | ||||
| 43 | CSIC C | ||||
| 44 | Ink End Sensor K | Detect the amount of ink in the sub tank. | ACES Sensor | ||
| 45 | Ink End Sensor Y | ||||
| 46 | Ink End Sensor M | ||||
| 47 | Ink End Sensor C | ||||
| 48 | Inclination Sensor | Detects the product is tilted. | Acceleration Sensor | ||
| 49 | Ink Flow Path Valve Position Sensor 1 | Detects status of the ink flow path valve 1. | Transmission type photo interrupter | ||
| 50 | Ink Flow Path Valve Position Sensor 2 | Detects status of the ink flow path valve 2. | Transmission type photo interrupter | ||
| 51 | Ink Leak Sensor 1 | Detects the ink leakage from the Ink path. | Analog sensor |


| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 52 | Valve Selection HP Sensor | IS | Detects the HP of the valve selection cam. | Transmission type photo interrupter | Ink System Unit |
| 53 | Ink Leak Sensor 3 | Detects the ink leakage from the Ink path. | Analog sensor | ||
| 54 | Ink Leak Sensor 2 |

| No. | Name | Element | Function | Type | Replacement procedure |
|---|---|---|---|---|---|
| 55 | Ink Leak Sensor 4 | IS | Detects the ink leakage from the Ink path. | Analog sensor | Ink System Unit |
| 56 | Ink Leak Sensor 5 |