• Code: 03-350, 03-351, 03-354
• Description: IOT to Tray 1 and Tray 2 PWB Error RAP 03-350 The IOT has detected no response from the tray 1 and 2 control PWB to the ping request. 03-351 Tray 1 and 2 control PWB has detected a feed buffer overflow. 03-354 Communications failure. Tray 1 and 2 control PWB has detected a communications failure.
• Remedy: 1. Switch off the machine, GP 14. Ensure P/J9 and P/J271 are correctly and securely connected. 2. Go to Flag 1. Check the harness. Repair as necessary, GP 7. 3. Go to Flag 2. Check the +3.3V and 0V lines. Refer to: • P/J271 • 01D +3.3V Distribution RAP. • 01B 0V Distribution RAP. 4. Switch on the machine, GP 14. Perform OF7 IOT PWB Diagnostics RAP. 5. Re-load the software, GP 4 Machine Software. 6. Install new components as necessary: • Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2. • Tray 1 and 2 control PWB, PL 7.10 Item 2.

• Code: 03-359, 03-407
• Description: HCF Communications and Detection Error RAP 03-359 The HCF has failed to respond to tray 1 and 2 control PWB ping requests. 03-407 The system has failed to detect the HCF module at power on.
• Remedy: 1. Ensure the P/Js on the tray 1 and 2 control PWB, PL 7.10 Item 2 and the (W/O TAG 151) HCF PWB, PL 7.20 Item 2 or (W/TAG 151) HCF PWB , PL 7.21 Item 2 are correctly and securely connected. 2. Go to Flag 1. Check the harness. Repair as necessary, GP 7. 3. Go to Flag 1. Check the power supply lines. Refer to: • 01G +24V Distribution RAP. • 01E +5V Distribution RAP. • 01B 0V Distribution RAP. 4. Go to Flag 2. Check for the presence of pulses on the two data lines, using the AC volts range of the meter. NOTE: Pulses should be measured approximately every 20 seconds. Between pulses, the voltage should be approximately 1.5VAC. 5. As necessary, install new components: • Tray 1 and 2 control PWB, PL 7.10 Item 2. • (W/O TAG 151) HCF control PWB, PL 7.20 Item 2. • (W/TAG 151) HCF control PWB, PL 7.21 Item 2. 6. Reload the software, GP 4, Machine Software.

• Code: 03-360, 03-408 ... 03-410, 03-418
• Description: IOT to Output Device Error RAP 03-360 The IOT to output device communications have failed. 03-408 The IOT has failed to detect the OCT at power on. 03-410 The system failed to detect the output device at power on. 03-418 The system has detected that the output device software is not compatible with the image processing software.
• Remedy: NOTE: No parts of the OCT are spared. Where necessary, install a new OCT, PL 12.10 Item 2. NOTE: and show the external connections to the output devices. 1. As necessary, ensure that the connectors that follow are correctly and securely connected: • OCT Only. P/J495 on the OCT PWB, P/J151 on the Power and Control Module and P/J11 on the IOT PWB. • 1K LCSS Only. P/J3 on the 1K LCSS PWB, P/J151 on the Power and Control Module and P/J11 on the IOT PWB. • 2K LCSS Only. P/J301 on the 2K LCSS PWB, P/J151 on the Power and Control Module and P/J11 on the IOT PWB. 2. Go to Flag 1 and Flag 2. Check the harnesses. Repair as necessary, GP 7. 3. Perform the OF7 IOT PWB Diagnostics RAP. 4. OCT Only. If the problem persists install a new OCT, PL 12.10 Item 2. 5. 1K LCSS Only. Perform the following: • Go to the 11C-120 1K LCSS Power Distribution RAP. Check the +5V and +24V supply from the power supply module to the 1K LCSS PWB. Ensure that the voltages are steady. • Ensure that there is a good ground continuity between the power supply module, PL 11.124 Item 2 and the 1K LCSS frame. • Install new components as necessary: – Power supply module, PL 11.124 Item 2. – 1K LCSS PWB, PL 11.124 Item 1. 6. 2K LCSS Only. Perform the following: • Remove fuse F1 from the 2K LCSS PWB. Check the fuse. If the fuse is good, reinstall the fuse. If fuse F1 is blown, install a new 2K LCSS PWB, PL 11.26 Item 1. • Go to the 11D-110 2K LCSS Power Distribution RAP. Check the +5V and +24V supply from the power supply module to the 2K LCSS PWB. Ensure that the voltages are steady. • Ensure that there is a good ground continuity between the power supply module, PL 11.26 Item 2 and the 2K LCSS frame. • Install new components as necessary: – Power supply module, PL 11.26 Item 2. – 2K LCSS PWB, PL 11.26 Item 1 7. HVF and HVF BM Only. Perform the following: • Go to the 11A-171 HVF Power Distribution RAP. Check the +5V and +24V supply from the power supply module to the HVF PWB. Ensure that the voltages are steady. • Ensure that there is a good ground continuity between the power supply module, PL 11.157 Item 1 and the HVF frame. • Install new components as necessary: – Communications cable, PL 11.157. – Power supply module, PL 11.157 Item 1. 8. If the correct output device is not detected, go to Flag 3. Check that the voltages on the device ID lines are correct according to the table. Install new components as necessary: • Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2. • 1K LCSS PWB, PL 11.124 Item 1. • 2K LCSS PWB, PL 11.26 Item 1. • HVF PWB, PL 11.157 Item 2. • OCT, PL 12.10 Item 2.

• Code: 03-365
• Description: IOT Bus Failure RAP 03-365 The communications driver has failed. NOTE: This fault code can occur when the driver fails because of system electrical noise.
• Remedy: NOTE: The IOT controller should clear an I2C bus fault indication after five seconds. 1. Ensure the P/Js on the IOT PWB, PL 1.10 Item 2 are correctly seated. 2. Check that there is continuity between the upper and lower registration guide. Ensure that the screw that secures the upper and lower registration guides is tight. 3. Check that there is continuity between the halo guide and the registration guide. Raise and lower the short paper path assembly, PL 10.15, several times to ensure that the continuity is consistent. If the continuity is inconsistent, perform the following: • Examine the registration and halo guide bias contact for deformation or damage, PL 8.15 Item 23. • Ensure the transfer / detack harness is routed correctly at the rear of the short paper path, refer to. 4. This fault may be caused by a ground fault, perform 01A Ground Distribution RAP. 5. Reload the software, GP 4 Machine Software. 6. Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2.

• Code: 03-366
• Description: IOT to Tray 5 Module Communication Failure RAP 03-300 The IOT PWB has detected a communications failure with the tray 5 module.
• Remedy: 1. Go to Flag 1 and check the wiring. Repair the wiring as necessary, GP 7. 2. As necessary, perform the following: • Perform OF7 IOT Diagnostics RAP. • Install a new tray 5 control PWB, PL 7.68 Item 8. • Install a new IOT PWB, PL 1.10 Item 2.

• Code: 03-371, 03-372
• Description: Fuser and Xerographic CRUM Communication Error RAP 03-371: The fuser CRUM communications have failed. 03-372: The xerographics CRUM communications have failed.
• Remedy: 1. Ensure the P/Js on the IOT PWB, PL 1.10 Item 2 and the main drive motor and PWB assembly, (35-55 ppm) PL 4.15 Item 6 or (65-90 ppm) PL 4.10 Item 6 are correctly and securely connected. 2. Perform OF7 IOT PWB Diagnostics RAP. 3. Switch off the machine, GP 14. Go to Flag 1. Disconnect P/J8 on the IOT PWB. Switch on the machine, GP 14. Make a copy. Check the fault history for new occurrences of 03- 371 and 03-372 faults. If new occurrences are not listed, install a new IOT PWB, PL 1.10 Item 2. 4. Go to Flag 1. Check the harness, GP 7 and measure the voltages. As necessary, refer to: • 01B 0V Distribution RAP. • 01E +5V Distribution RAP. NOTE: PJ141 and PJ144 are in-line connectors on the rear panel, (refer to Flag 2 and Flag 3). They are connected when the module is installed and are susceptible to damage. Remove any torn paper / debris from the contacts. 5. 03-371 Only: Go to Flag 2. Check the harness. Remove any torn paper / debris from the fuser CRUM connector, (35-55ppm) PL 4.17 Item 12 or (65-90ppm) PL 4.12 Item 12. Repair as necessary. 6. 03-372 Only: Go to Flag 3. Check the harness. Remove any torn paper / debris from the xerographic CRUM connector, (35-55ppm) PL 4.17 Item 4 or (65-90) PL 4.12 Item 4. Repair as necessary. 7. Install new components as necessary: • 03-371 Only: Fuser connector assembly, (35-55 ppm) PL 4.15 Item 9 or (65-90 ppm) PL 4.10 Item 9. • 03-371 Only: Fuser Module, (35-55 ppm) PL 10.8 Item 1 or (65-90 ppm) PL 10.10 Item 1. • 03-372 Only: Xerographic module, PL 9.20 Item 2. • Main drive motor PWB assembly, (35-55 ppm) PL 4.15 Item 6 or (65-90 ppm) PL 4.10 Item 6. • Main Drive Module, (35-55 ppm) PL 4.15 Item 1 or (65-90 ppm) PL 4.10 Item 1. 8. Reload the software, GP 4 Machine Software.

• Code: 03-374
• Description: Power Off Failure RAP 03-374 The single board controller PWB has detected that the LVPS is still on, 30 seconds after a power off request.
• Remedy: Ensure the P/Js on the IOT PWB, PL 1.10 Item 2 and the single board controller PWB, PL 3.24 Item 3 are correctly and securely connected. The fault is still present. Y↓N→Perform SCP 6 Final Actions. Remove the left hand cover, PL 8.10 Item 3. Go to Flag 1. Measure the voltages at the on/off switch terminals. The voltages are +3.3V and 0V. Y↓N→Go to: • GP 13 How to check a switch. • P/J5. • 01B, 0V Distribution RAP. • 01J Power On and LVPS Control Signals RAP. • If necessary, install a new on/off switch, PL 1.10 Item 8. NOTE: The LVPS is software controlled. When the voltage on PJ26 is low, the LVPS should be on. When the voltage on PJ26 pin 7 is high, the LVPS should be off. Go to Flag 3. Measure the voltage at P/J26 pin 7 on the IOT PWB. Operate the on / off switch. Select power down then confirm from the UI. The voltage changes from low to high within 30 seconds. Y↓N→Install new components as required: • Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2. • Single board controller PWB, PL 3.24 Item 3. Check the state of the LVPS by observing the power indication LEDs on the IOT PWB, (refer to the OF7 IOT PWB Diagnostics RAP). The LVPS has switched off. Y↓N→Install a LVPS and base module, PL 1.10 Item 3. Go to Flag 2. Measure the voltage at P/J1 pin 15 on the IOT PWB. Operate the on / off switch. A single low pulse is detected. Y↓N→Go to Flag 2. Check the wiring. Repair as necessary, GP 7. Install new components as necessary: • Single board controller PWB, PL 3.24 Item 3. • Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2. Go to Flag 2. Set the meter to measure frequency. Check the pulses at P/J1 pin 13, on the IOT PWB. These are approximately 1Hz pulses. The pulses have stopped. Y↓N→Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2. Perform the following: • Check that all associated wiring is in good condition, GP 7. • Reload the software, GP 4, Machine Software. • Install a new single board controller PWB, PL 3.24 Item 3.

• Code: 03-395, 03-396, 03-852, 03-853
• Description: IOT PWB Fault RAP 03-395 The IOT has cycled without printing. 03-396 The photoreceptor is detected not turning while the laser is on. 03-852 IOT has detected that it is out of timers. 03-853 IOT has detected that it is nearly out of timers. Also use this RAP for fault code 06-350 ROS Laser Not Under Control.
• Remedy: 1. Ensure all the P/Js on the IOT PWB, PL 1.10 Item 2 are correctly and securely connected. 2. 03-395 Only: This fault can be caused by a poor ground on the duplex tray or a paper path problem. Check the active fault list for an 08-XXX or 09-XXX. Go to the indicated RAP. 3. 03-395 Only: This fault can also be caused by a paper guide in a paper tray being set to the wrong paper size. Check the paper guide settings in the paper trays. 4. Perform the OF7 IOT PWB Diagnostics RAP. 5. Reload the software set, GP 4, Machine Software. NOTE: The supply harness is a flying lead that is a part of the LVPS and is not spared separately. 6. Go to Flag 1. Check the voltages. As necessary, refer to: • 01G +24V Distribution RAP. • 01F +12V Distribution RAP. • 01E +5V Distribution RAP. • 01D +3.3V Distribution RAP. • 01B 0V Distribution RAP. 7. 03-853 Only: Print off a fault history report then troubleshoot any codes that coincide with the 03-853 fault, refer to SCP 1. 8. 03-396 Only: If necessary, go to the 04A Main Drive Motor and Photoreceptor Motor RAP. Perform the photoreceptor motor checkout. 9. As necessary, install new components: • Perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is installed, PL 1.10 Item 2. • LVPS and base module, PL 1.10 Item 3.