Ricoh D143 MPC4502A AP-C3
Troubleshooting. Electrical Component Defects 1
Sensors
Note:
• The CN numbers in the following table are the connector numbers on the IOB.
No. | Sensor Name/ Sensor Board Name |
Active | CN | Condition | Symptom |
SW1 | Right Door Open Switch | L | CN204/1 | Open | "Open Cover" is displayed. |
Shorted | "Open cover" cannot be detected. | ||||
S9 | Duplex Door | L | CN232/B11 | Open | "Open Cover" is displayed. |
Shorted | "Open cover" cannot be detected. | ||||
ID Sensor: Front | A | CN219/1 | Open/ Shorted |
SC370 | |
S1 | ID Sensor: Center and K | A | CN219/2 | Open/ Shorted |
SC370 |
ID Sensor: Rear | A | CN219/3 | Open/ Shorted |
SC370 | |
S12 | Registration Sensor | L | CN224/A2 | Open | Jam A (Jam8, 17) |
Shorted | Jam A, B (Jam1) | ||||
S30 | Drum Gear Position Sensor-K |
H | CN222/A2 | Open/ Shorted |
SC390-01/SC396-01 |
S31 | Drum Gear Position Sensor-C |
H | CN222/ A5 | Open/ Shorted |
SC390-02/SC396-02 |
S32 | Drum Gear Position Sensor-M |
H | CN222/ A8 | Open/ Shorted |
SC390-03/SC396-03 |
S33 | Drum Gear Position Sensor-Y |
H | CN222/ A11 | Open/ Shorted |
SC390-04/SC396-04 |
S26 S27 S28 S29 |
Toner End Sensor - K Toner End Sensor - Y Toner End Sensor - C Toner End Sensor - M |
L | CN207/B14 CN207/B3 CN207/ B9 CN207/ B6 |
Open | Toner end cannot be detected. |
Shorted | Toner end is detected when there is enough toner. |
||||
S34 | Image Transfer Belt Rotation Sensor | H/L | CN206/3 | Open/ Shorted |
SC443 |
S19 | Vertical Transport Sensor 1 |
L | CN230/A7 | Open | Jam A (Jam3, 11) |
Shorted | Jam A, B (Jam1) | ||||
S20 S24 |
Paper End Sensor 1, 2 |
L | CN230/ A10, B10 |
Open | Paper end is not detected when there is no paper in the paper tray. |
Shorted | Paper end is detected when there is paper in the paper tray. | ||||
S21 S25 |
Paper Lift Sensor 1,2 | H | CN230/ A13, B13 |
Open/ Shorted |
SC501, SC502 |
S23 | Vertical Transport Sensor 2 |
L | CN230/B7 | Open | Jam A (Jam4, 12) |
Shorted | Jam A, B (Jam1) | ||||
S14 S15 |
Tray 1 Paper Height Sensor 1, 2 | L | CN224/ B2, B5 |
Open/ Shorted |
Remaining paper volume on the LCD is wrong. |
S16 S17 |
Tray 2 Paper Height Sensor 1, 2 | L | CN224/ B10, B13 |
Open/ Shorted |
Remaining paper volume on the LCD is wrong. |
S18 | Tray 1 Paper Feed Sensor |
L | CN230/A4 | Open/ Shorted |
Jam A, B |
S22 | Tray 2 Paper Feed Sensor |
L | CN230/B4 | Open/ Shorted |
Jam A, B |
SW4 | Tray 1 Set Switch | L | CN224/A9 | Open | Tray 1 is not detected when tray 1 is set. |
Shorted | Tray 1 is detected when tray 1 is not set. | ||||
S11 | By-pass Paper Size Sensor |
L | CN232/ B16, B17, B19, B20 |
Open/ Shorted |
Paper size error |
SW2 | By-pass Paper Detection | L | CN232/ A10 |
Open | Paper on the by-pass tray is not detected when paper is set. |
Shorted | Paper on the by-pass tray is detected when paper is not set. |
||||
S10 | By-pass Paper Length Sensor | L | CN232/ B14 |
Open | Paper size error |
Shorted | |||||
S8 | Fusing Entrance Sensor | L | CN232/B2 | Open | Jam C (Jam 18) |
Shorted | Jam C (Jam 1) | ||||
S6 | Duplex Entrance Sensor | L | CN232/A2 | Open | Jam Z (Jam 26/27) |
Shorted | Jam Z (Jam 1) | ||||
S7 | Duplex Exit Sensor | L | CN232/ B8 |
Open | Jam Z (Jam 25) |
Shorted | Jam Z (Jam 1) | ||||
S39 | TD Sensor - K | A | CN227/A7 | Open/ Shorted |
SC360-01 |
S40 | TD Sensor - C | A | CN227/ A15 |
Open/ Shorted |
SC360-02 |