• Code: H7-3, H7-4
• Description: Tray 4-5 Control Board Failure - NVM A read/write error has occurred in the NVRAM located on the Tray 4-5 PWB. • Tray 4-5 Control Board Failure - H7-3 NVM Out-of-order • Tray 4-5 Control Board Failure - H7-4 NVM R/W Error
• Causes: • Tray 4-5 PWB • Engine Control Board
• Remedy: 1 Cycle the printer power. Does the error reoccur? Go to Step 3. Problem solved. 2 Check the Tray 4-5 PWB connection. Are P/J413 and P/J541 connected? Go to Step 3. Connect P/J413 and P/541. 3 Check continuity between the Tray 4-5 PWB and the Engine Control Board. 1. Disconnect P/J413 and P/J541. 2. Check for continuity at the following: • P/J413-A1 <=> P/J541-1 • P/J413-A2<=> P/J541-2 • P/J413-A3 <=> P/J541-3 • P/J413-A4 <=> P/J541-4 • P/J413-A5 <=> P/J541-5 • P/J413-A6 <=> P/J541-6 • P/J413-B1 <=> P/J541-7 • P/J413-B2 <=> P/J541-8 • P/J413-B3 <=> P/J541-9 • P/J413-B4 <=> P/J541-10 • P/J413-B5 <=> P/J541-11 • P/J413-B6 <=> P/J541-12 Are these conductive? Go to Step 4. Repair the wiring. 4 Check for +5 V to the Tray 4-5 PWB. Is there +5 V across P/J413-A5 (+) <=> ground? Replace the Tray 4-5 PWB. Replace the Engine Control Board.

• Code: H7-7
• Description: Tray 4-5 Control Board Failure - H7-7 Comm Failure Communications error between 1000-Sheet Feeder and the Engine Control Board.
• Causes: • Tray 4-5 PWB • Engine Control Board
• Remedy: 1 Check the 1000-Sheet Feeder installation. Disconnect P/J413 from the Printer and reconnect it. Does the 1000-Sheet Feeder operate? Problem solved. Go to Step 2. 2 Check the Tray 4-5 PWB connection. Is P/J541 connected? Go to Step 3. Connect P/J413. 3 Check continuity between the Tray 4-5 PWB and the Engine Control Board. 1. Disconnect P/J413 and P/J541. 2. Check for continuity at the following: • P/J413-A1 <=> P/J541-1 • P/J413-A2<=> P/J541-2 • P/J413-A3 <=> P/J541-3 • P/J413-A4 <=> P/J541-4 • P/J413-A5 <=> P/J541-5 • P/J413-A6 <=> P/J541-6 • P/J413-B1 <=> P/J541-7 • P/J413-B2 <=> P/J541-8 • P/J413-B3 <=> P/J541-9 • P/J413-B4 <=> P/J541-10 • P/J413-B5 <=> P/J541-11 • P/J413-B6 <=> P/J541-12 Are these conductive? Go to Step 4. Repair the wiring. 4 Check for +5 V to the Tray 4-5 PWB. Is there +5 V across P/J541-5 (+) <=> ground? Replace the Tray 4-5 PWB. Replace the Engine Control Board.

• Code: H7-8
• Description: Incorrect Tray 4-5 Installed - H7-8 Type Error The 1000-Sheet Feeder is not recognized as the proper type for the printer.
• Causes: • Tray 4-5 PWB • Engine Control Board
• Remedy: 1 Check the Tray 4-5 installation. Disconnect the 1000-Sheet Feeder from the Printer and reconnect it. Does the error still occur? Go to Step 2. Problem solved. 2 Check the settings of the Dip Switch SW1 on the Tray 4-5 PWB. • SW1-1 is in the Left position • SW1-2 is in the Right position • SW1-3 is in the Right position • SW1-4 is in the Left position Are the switches set correctly? Go to Step 3. Correct the Switch settings. If problem persists, go to Step 3. 3 Check Tray 4-5 PWB connections. Is P/J541 connected? Go to Step 4. Connect P/J541. 4 Check continuity between the Tray 4-5 PWB and the Engine Control Board. 1. Disconnect P/J413 and P/J541. 2. Check for continuity at the following: • P/J413-A1 <=> P/J541-1 • P/J413-A2<=> P/J541-2 • P/J413-A3 <=> P/J541-3 • P/J413-A4 <=> P/J541-4 • P/J413-A5 <=> P/J541-5 • P/J413-A6 <=> P/J541-6 • P/J413-B1 <=> P/J541-7 • P/J413-B2 <=> P/J541-8 • P/J413-B3 <=> P/J541-9 • P/J413-B4 <=> P/J541-10 • P/J413-B5 <=> P/J541-11 • P/J413-B6 <=> P/J541-12 Are these conductive? Go to Step 5. Repair the wiring. 5 Check for +5 V to the Tray 4-5 PWB. Is there +5 V across P/J541-5 (+) <=> ground? Replace the Tray 4-5 PWB. Replace the Engine Control Board.

• Code: H8-1, H8-2
• Description: Tray N Failure - H8-1, Tray 2-3 Size Sensor Broken Paper size detection has failed in Tray 2 or Tray 3. NOTE: In cases where a Tray 2 Missing error occurs with Tray 2 inserted, verify the condition of the switches by first removing Tray 3, then testing the Tray 2 Paper Size Switches. • Tray 2 Failure - H8-1 Tray 2 Size Sensor Broken • Tray 3 Failure - H8-2 Tray 3 Size Sensor Broken
• Causes: • Paper Size Switch • Engine Control Board
• Remedy: 1 Check the Paper in the affected tray. Is paper loaded in the tray properly? Go to Step 2. Reload the paper. 2 Check the Paper Size Switch for the affected tray. Is the switch installed correctly? Go to Step 3. Correct the installation. 3 Test the Paper Size Switch for the affected tray. Run the Service Diagnostics Size Sensor test for the affected tray. Does the sensor state change each time the loaded tray is moved in or out? Reconnect the connector of the Engine Control Board. Go to Step 4. 4 Check the Paper Size Switch connection. For Tray 2: Are P/J109 and P/J412 connected? For Tray 3: Are P/J110 and P/J412 connected? Go to Step 5. Connect the Paper Size Switch. 5 Check continuity between the affected Paper Size Switch and the Engine Control Board. For Tray 2: 1. Disconnect P/J109 and P/J412. 2. Check for continuity at the following: • P/J109-1 <=> P/J412-4 • P/J109-2 <=> P/J412-3 • P/J109-3 <=> P/J412-2 • P/J109-4 <=> P/J412-1 For Tray 3: 1. Disconnect P/J110 and P/J412. 2. Check for continuity at the following: • P/J110-1 <=> P/J412-9 • P/J110-2 <=> P/J412-8 • P/J110-3 <=> P/J412-7 • P/J110-4 <=> P/J412-6 Are these conductive? Go to Step 6. Repair the wiring. 6 Check for +5 V to the Paper Size Switch. For Tray 2: Is there +5 V across J109-1 (+) <=> ground? For Tray 3: Is there +5 V across J110-1 (+) <=> ground? Replace the Paper Size Switch for the affected tray. Replace the Engine Control Board

• Code: H8-3, H8-4
• Description: Tray N Failure - H8-3, 4-5 Tray Size Sensor Broken Paper size detection has failed in Tray 4 or Tray 5. • Tray 4 Failure - H8-3 Tray 4 Size Sensor Broken • Tray 5 Failure - H8-4 Tray 5 Size Sensor Broken
• Causes: • Paper Size Switch • Tray 4-5 PWB • Engine Control Board
• Remedy: 1 Check the Paper in the affected tray. Is paper loaded in the tray properly? Go to Step 2. Reload the paper. 2 Check the Paper Size Switch for the affected tray. Is the switch installed correctly? Go to Step 3. Correct the installation. 3 Test the Paper Size Switch for the affected tray. Run the Service Diagnostics Size Sensor test for the affected tray. Does the sensor state change each time an individual switch is activated? Replace the Engine Control Board. Go to Step 4. 4 Check the Paper Size Switch connection. For Tray 4: Are P/J820 and P/J548 connected? For Tray 5: Are P/J824 and P/J548 connected? Go to Step 6. Connect the Paper Size Switch. 5 Check continuity between the affected Paper Size Switch and the Engine Control Board. For Tray 4: 1. Disconnect P/J820 and P/J548. 2. Check for continuity at the following: • P/J820-1 <=> P/J548-14 • P/J820-2 <=> P/J548-13 • P/J820-3 <=> P/J548-12 • P/J820-4 <=> P/J548-11 For Tray 5: 1. Disconnect P/J824 and P/J548. 2. Check for continuity at the following: • P/J824-1 <=> P/J548-7 • P/J824-2 <=> P/J548-6 • P/J824-3 <=> P/J548-5 • P/J824-4 <=> P/J548-4 Are these conductive? Go to Step 7. Repair the wiring. 6 Check for +3.3 V to the Paper Size Switch. For Tray 4: Is there +3.3 V across P/J820-1 (+) <=> ground? For Tray 5: Is there +3.3 V across P/J824-1 (+) <=> ground? Replace the Paper Size Switch for the affected tray. Replace the Engine Control Board. 7 Check the Tray 4-5 PWB connection. Are P/J413 and P/J541 connected? Go to Step 9. Connect P/J413 and P/541. 8 Check continuity between the Tray 4-5 PWB and the Engine Control Board. 1. Disconnect P/J541 and P/J413. 2. Check for continuity at the following: • P/J541-1 <=> P/J413-A1 • P/J541-2 <=> P/J413-A2 • P/J541-3 <=> P/J413-A3 • P/J541-4 <=> P/J413-A4 • P/J541-5 <=> P/J413-A5 • P/J541-6 <=> P/J413-A6 • P/J541-7 <=> P/J413-B1 • P/J541-8 <=> P/J413-B2 • P/J541-9 <=> P/J413-B3 • P/J541-10 <=> P/J413-B4 • P/J541-11 <=> P/J413-B5 • P/J541-12 <=> P/J413-B6 Are these conductive? Go to Step 10. Repair the wiring. 9 Check for +5 V to the Tray 4-5 PWB. Is there +5 V across P/J413-A5 (+) <=> ground? Replace the Tray 4-5 PWB. Replace the Engine Control Board. 10 Check the Paper Size Switch connection. For Tray 4: Are P/J820 and P/J548 connected? For Tray 5: Are P/J824 and P/J548 connected? Go to Step 6. Connect the Paper Size Switch.

• Code: J1-2
• Description: Toner Empty - J1-2 Toner Empty The Toner Cartridge is empty.
• Causes: • Toner Cartridge • Toner Dispense Assembly • Toner Dispense Motor • Toner CRUM PWB • Engine Control Board
• Remedy: 1 Check remaining toner. Does the Toner Cartridge contain sufficient toner? Go to Step 2. Replace the Toner Cartridge. 2 Check the Toner Cartridge installation. Remove the Toner Cartridge and reinstall. Does it operate properly? Problem solved. Go to Step 3. 3 Check the gear of the Toner Dispense Assembly. Does the gear of the Toner Dispense Assembly rotate smoothly? Go to Step 4. Restore proper operation. 4 Check the Toner Dispense Assembly for clogging. Is the tube located at the lower part of the Toner Dispense Assembly clogged? Check the tube. Go to Step 5. 5 Check the Toner CRUM PWB installation. Is the Toner CRUM PWB installed correctly? Go to Step 6. Correct the installation. 6 Check the Toner CRUM PWB connections. Are P127 and P/J419 connected? Go to Step 7. Connect P127 and P/J419. 7 Check continuity between the Toner CRUM PWB and Engine Control Board. 1. Disconnect P/127 and P/J419. 2. Check for continuity at the following: • P127-6 <=> P/J419-6 • P127-5 <=> P/J419-7 • P127-4 <=> P/J419-8 • P127-3 <=> P/J419-9 • P127-2 <=> P/J419-10 • P127-1 <=> Not connected Are these conductive? Go to Step 8. Repair the wiring. 8 Check for +5 V to the Toner CRUM PWB. Is there +5 V across P127-6 (+) <=> ground? Go to Step 9. Replace the Engine Control Board. 9 Test the Toner Dispense Motor. Run the Service Diagnostics Toner Dispense Motor test. Does the motor rotate? Replace the Engine Control Boar. Go to Step 10. 10 Check Toner Dispense Motor connections. Are P/J216 and P/J420 connected? Go to Step 11. Connect P/J216 and P/J420. 11 Check continuity between the Toner Dispense Motor and Engine Control Board. 1. Disconnect P/J420 and P/J216. 2. Check for continuity at the following: • P/J420-1 <=> P/J216-2 • P/J420-2 <=> P/J216-1 Are these conductive? Go to Step 12. Repair the wiring. 12 Check for +24 V to the Toner Dispense Motor. Is there +24 V across P/J216-1 (+) <=> ground? Replace the Toner Dispense Motor. Replace the Engine Control Board.

• Code: J3-1
• Description: No Drum Cartridge - J3-1 Drum Not Installed The Drum Cartridge is not detected by the Drum Cartridge Detect Switch.
• Causes: • Drum Cartridge • Drum Cartridge Detect Switch • Engine Control Board
• Remedy: 1 Check the Drum Cartridge installation. Was the Drum Cartridge replaced? Go to Step 2. Replace the Drum Cartridge. If the error persists, go to Step 2. 2 Test the Drum Cartridge Detect Switch. Run the Service Diagnostics Detect DRUM Cartridge Switch test. Does the switch status change when the Drum Cartridge is moved in and out? Replace the Engine Control Board. Go to Step 3. 3 Check the Drum Cartridge Detect Switch connection. Is P/J404 connected? Go to Step 4. Connect P/J404. 4 Check Drum Cartridge Detect Switch continuity. Is there continuity between P/J404-1 <=> P/ J404-3 when the Drum Cartridge is installed? Go to Step 5. Repair the wiring. 5 Check for +5 V to the Drum Cartridge Detect Switch. Is there +5 V across P/J404-3 (+) <=> ground? Replace the Drum Cartridge Detect Switch. Replace the Engine Control Board.

• Code: J4-1
• Description: Drum Cartridge Failure - J4-1 ATC Sensor Detect The ATC Sensor is defective.
• Causes: • Drum Cartridge • Front Harness A • Drum Cartridge Detect Switch • Engine Control Board
• Remedy: 1 Replace the Drum Cartridge. Does the error reoccur? Go to Step 2. Problem solved. 2 Test the Front Harness A. Run the Service Diagnostics DRUM Cartridge Detect Switch test. Does the switch status change when the Drum Cartridge is moved in and out? Replace the Engine Control Board. Go to Step 3. 3 Check the DRUM Cartridge Detect Switch connection. Is P/J404 connected? Go to Step 4. Connect P/J404. 4 Check DRUM Cartridge Detect Switch continuity. Is there continuity between P/J404-1 <=> P/ J404-3 when the Drum Cartridge is installed? Go to Step 5. Repair the wiring. 5 Check for +5 V to the DRUM Cartridge Detect Switch. Is there +5 V across P/J404-3 (+) <=> ground? Replace the Drum Cartridge Detect Switch. Replace the Engine Control Board.