• Code: 007-273
• Description: Tray 5 Paper Size Sensor Broken (3TM) An abnormal A/D value was detected by the Tray5 Paper Size Sensor.
• Remedy: Ensure Tray 5 is properly closed. Measure the voltage at P/J548-5 (refer to 3T Module (rear) Plug/Jack Locations ) on the Tray Module PWB (PL 15.9). The voltage measured corresponds with the paper size in Table 1. Y↓N→There is +5 VDC between P/J824-1 and 3 on the Paper Size Sensor (PL 16.1). Y↓N→There is +5 VDC between P/J548-6 and 4 on the Tray Module PWB. Y↓N→Go to the +5 VDC Wirenets ( +5 VDC Wirenet ) to troubleshoot the power circuit. Check the wires from P/J548 to P/J824 for damage. Repair or replace as required. Check the wire from P/J548-5 to P/J824-2 for damage. Repair or replace as required. If the wire check out OK, replace the Tray 5 Paper Size Sensor (PL 16.1). • Ensure that the connectors shown in the circuit diagram are securely connected and that the wires are not damaged. • Replace the Tray 5 Paper Size Sensor (PL 16.1). • If the problem persists, replace the Tray Module PWB (PL 15.9).

• Code: 007-274
• Description: Tray 1 (MPT) Paper Size Sensor Broken An abnormal A/D value was detected by the Tray 1 (MPT) Paper Size Sensor.
• Remedy: Check the voltage between P/J265-2 (yellow wire toward rear) and ground. Move the Side Guide for Tray 1 (MPT). The voltage changes from 0 VDC to 3 VDC. Y↓N→+3.3 VDC is measured at P/J265-1 on the Tray 1 Paper Size Sensor (refer to Tray 1 - Plug/Jack Locations ). Y↓N→Check the wires and connectors. If the check is OK, replace the I/F PWB (PL 9.1) Replace Tray 1 (MPT) Assembly (PL 2.12). Check the wires and connectors. If the check is OK, replace the I/F PWB (PL 9.1).

• Code: 007-276
• Description: Tray 4 Paper Size Sensor Broken (TTM) An abnormal A/D value was detected by the Tray 4 Paper Size Sensor.
• Remedy: Ensure Tray 4 is closed. The voltage measured at P/J548-11 (refer to TT Module (rear), Plug/Jack Locations ) on the Tray Module PWB (PL 16.15) corresponds to the paper size in Table 1. Y↓N→There is +5 VDC from P/J820-1 to P/J820-3 on the Tray 3 Size Sensor (refer to TT Module (Tray 3, 4, 5 Paper Size Switch) - Plug/Jack Locations ). Y↓N→There is +5 VDC from P/J548-12 to P/J548-10. Y↓N→Go to the +5 VDC Wirenets ( +5 VDC Wirenet ) to troubleshoot the power circuit Check the wires from J548 to J820. If the check is OK, replace the Tray Module PWB (PL 16.15). Check the wire from J548-11 to J820-2. If the wire is OK, replace the Tray 4 Paper Size Sensor (PL 16.1). Check the wires and connectors for intermittent shorts or loose connections. If the check is OK, replace the Tray Module PWB (PL 16.15). If the problem continues, replace Tray 4 Paper Size Sensor (PL 16.1).

• Code: 007-277
• Description: Tray 5 Paper Size Sensor Broken (TTM) An abnormal A/D value was detected by the Tray 5 Paper Size Sensor.
• Remedy: Ensure Tray 5 is closed. The voltage measured at P/J548-5 (refer to TT Module (rear) - Plug/Jack Locations ) on the Tray Module PWB (PL 16.15) corresponds to the paper size in Table 1. Y↓N→There is +5 VDC from P/J824-1 to P/J824-3 on the Tray 5 Size Sensor (refer to TT Module (Tray 3, 4, 5 Paper Size Switch) - Plug/Jack Locations ). Y↓N→There is +5 VDC from P/J548-6 to P/J548-4. Y↓N→Go to the +5 VDC Wirenets ( +5 VDC Wirenet ) to troubleshoot the power circuit. Check the wires and connectors. If the check is OK, replace the Tray Module PWB (PL 16.15). Check the wires from J548 to J824. If the check is OK, replace Tray 5 Paper Size Sensor (PL 16.1). Check the wire from J824-2 to J548-5. If the wire is OK, replace Tray 5 Paper Size Sensor (PL 16.1). Check the wires and connectors for intermittent shorts or loose connections. If the check is OK, replace the Tray Module PWB (PL 16.15). If the problem continues, replace Tray 5 Paper Size Sensor (PL 16.1).

• Code: 007-281
• Description: Tray 2 Lift Fail The Tray 2 Level Sensor does not detect that the Tray has lifted. Examine the trays and paper feed assemblies for any physical damage before starting the troubleshooting procedure.
• Remedy: 1 Is the problem with Tray 2? Go to step 2. Go to step 7. 2 1. Remove and then reseat Tray 2. 2. Does the Lift Motor operate? Go to step 3. Go to step 4. 3 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 4 1. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Run Tray 2 Sensor test: Tray Sensors > Tray2. 2. Does the level indicate H? Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. Engine Interface Board 4. Engine Control Board (MCU PWB) Go to step 5. 5 1. While still in Service Diagnostics, remove Tray 2. 2. Does SW1-4 indicate LLLL? Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 6. 6 1. Reseat the Paper Tray. 2. Does SW1-4: indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) 7 1. Remove and then reseat the problem tray. 2. Listen for the Motor. Does the Lift Motor operate? Go to step 8. Go to step 9. 8 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 9 Using Service Diagnostics, check the Level Sensor and No Paper Sensor. Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. LTA HCF Control Board 4. Engine Interface Board 5. Engine Control Board (MCU PWB) Go to step 10. 10 While still in Service Diagnostics, remove Tray 2. Replace in order until resolved: 1. Paper-Select Switch Assy. 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 11. 11 1. Reseat the Paper Tray. 2. Does SW1-4 indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB)

• Code: 007-282
• Description: Tray 3 Lift Fail The Tray 3 Level Sensor does not detect that the Tray has lifted. Examine the trays and paper feed assemblies for any physical damage before starting the troubleshooting procedure.
• Remedy: 1 Is the problem with Tray 3? Go to step 2. Go to step 7. 2 1. Remove and then reseat Tray 3. 2. Does the Lift Motor operate? Go to step 3. Go to step 4. 3 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 4 1. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Run Tray 3 Sensor test: Tray Sensors > Tray3. 2. Does the level indicate H? Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. Engine Interface Board 4. Engine Control Board (MCU PWB) Go to step 5. 5 1. While still in Service Diagnostics, remove Tray 3. 2. Does SW1-4 indicate LLLL? Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 6. 6 1. Reseat the Paper Tray. 2. Does SW1-4: indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) 7 1. Remove and then reseat the problem tray. 2. Listen for the Motor. Does the Lift Motor operate? Go to step 8. Go to step 9. 8 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 9 Using Service Diagnostics, check the Level Sensor and No Paper Sensor. Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. LTA HCF Control Board 4. Engine Interface Board 5. Engine Control Board (MCU PWB) Go to step 10. 10 While still in Service Diagnostics, remove Tray 3. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 11. 11 1. Reseat the Paper Tray. 2. Does SW1-4 indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB)

• Code: 007-283
• Description: Tray 4 Lift Fail The Tray 4 Level Sensor does not detect that the Tray has lifted. Examine the trays and paper feed assemblies for any physical damage before starting the troubleshooting procedure.
• Remedy: 1 Is the problem with Tray 4? Go to step 2. Go to step 7. 2 1. Remove and then reseat Tray 4. 2. Does the Lift Motor operate? Go to step 3. Go to step 4. 3 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 4 1. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Run Tray 4 Sensor test: Tray Sensors > Tray4. 2. Does the level indicate H? Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. Engine Interface Board 4. Engine Control Board (MCU PWB) Go to step 5. 5 1. While still in Service Diagnostics, remove Tray 4. 2. Does SW1-4 indicate LLLL? Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 6. 6 1. Reseat the Paper Tray. 2. Does SW1-4: indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) 7 1. Remove and then reseat the problem tray. 2. Listen for the Motor, does the Lift Motor operate? Go to step 8. Go to step 9. 8 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB). Replace the Engine Control Board (MCU PWB). 9 Using Service Diagnostics, check the Level Sensor and No Paper Sensor. Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. LTA HCF Control Board 4. Engine Interface Board 5. Engine Control Board (MCU PWB) Go to step 10. 10 While still in Service Diagnostics, remove Tray 4. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 11. 11 1. Reseat the Paper Tray. 2. Does SW1-4 indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB)

• Code: 007-284
• Description: Tray 5 Lift Fail The Tray 5 Level Sensor does not detect that the Tray has lifted. Examine the trays and paper feed assemblies for any physical damage before starting the troubleshooting procedure.
• Remedy: 1 Is the problem with Tray 5? Go to step 2. Go to step 7. 2 1. Remove and then reseat Tray 5. 2. Does the Lift Motor operate? Go to step 3. Go to step 4. 3 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 4 1. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Run Tray 5 Sensor test: Tray Sensors > Tray5. 2. Does the level indicate H? Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. Engine Interface Board 4. Engine Control Board (MCU PWB) Go to step 5. 5 1. While still in Service Diagnostics, remove Tray 5. 2. Does SW1-4 indicate LLLL? Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 6. 6 1. Reseat the Paper Tray. 2. Does SW1-4: indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) 7 1. Remove and then reseat the problem tray. 2. Listen for the Motor, does the Lift Motor operate? Go to step 8. Go to step 9. 8 Did the error clear from the Control Panel? Complete. This could be an intermittent problem. If the problem returns, replace in order: 1. Tray Level Sensor 2. Engine Control Board (MCU PWB) Replace the Engine Control Board (MCU PWB). 9 Using Service Diagnostics, check the Level Sensor and No Paper Sensor. Replace in order until resolved: 1. Tray Level Sensor 2. No Paper Sensor 3. LTA HCF Control Board 4. Engine Interface Board 5. Engine Control Board (MCU PWB) Go to step 10. 10 While still in Service Diagnostics, remove Tray 5. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB) Go to step 11. 11 1. Reseat the Paper Tray. 2. Does SW1-4 indicate H in any position? Replace the Paper Feed Motor. Replace in order until resolved: 1. Paper-Select Switch Assembly 2. Engine Interface Board 3. Engine Control Board (MCU PWB)