Remedy: 1 Turn printer off and remove I/O board shield. Disconnect DCN4 connector from I/O board. Measure resistance between cable pins 5 and 6. Is resistance between 162 and 198 ohms? Replace I/O board. Go to step 5. Go to step 2. 2 Remove items to expose toner retract solenoid. Check toner retract solenoid cable connection. Is cable properly connected? Go to step 3. Properly connect cable. Reassemble and retest printer. 3 Check toner retract solenoid cable and connecting cable for visible damage. Is either cable damaged? Replace damaged cable or toner retract solenoid. Reassemble and retest printer. Go to step 4. 4 Disconnect toner retract solenoid cable from cable that attaches to I/O board. Check cable continuity from DCN4 pins 5 and 6 to connector that attaches to toner retract solenoid. Ensure that pins are not shorted. Is cable okay? Replace toner retract solenoid. Reassemble and retest printer. Replace cable. Reassemble and retest printer. 5 Reassemble and retest printer. Does 906 error reappear? Turn printer off and replace engine controller board. Problem solved.
Remedy: 1 Turn printer off and remove I/O board shield. Disconnect DCN4 connector from I/O board. Measure resistance between cable pins 7 and 8. Is resistance between 162 and 198 ohms? Replace I/O board. Go to step 5. Go to step 2. 2 Remove items to expose toner retract solenoid. Check toner retract solenoid cable connection. Is cable properly connected? Go to step 3. Properly connect cable. Reassemble and retest printer. 3 Check toner retract solenoid cable and connecting cable for visible damage. Is either cable damaged? Replace damaged cable or toner retract solenoid. Reassemble and retest printer. Go to step 4. 4 Disconnect toner retract solenoid cable from cable that attaches to I/O board. Check cable continuity from DCN4 pins 7 and 8 to connector that attaches to toner retract solenoid. Ensure that pins are not shorted. Is cable okay? Replace toner retract solenoid. Reassemble and retest printer. Replace cable. Reassemble and retest printer. 5 Reassemble and retest printer. Does 907 error reappear? Turn printer off and replace engine controller board. Problem solved.
Code: 908
Description: Black toner retract solenoid error (DSLK)
Remedy: 1 Turn printer off and remove I/O board shield. Disconnect DCN4 connector from I/O board. Measure resistance between cable pins 1 and 2. Is resistance between 162 and 198 ohms? Replace I/O board. Go to step 5. Go to step 2. 2 Remove items to expose toner retract solenoid. Check toner retract solenoid cable connection. Is cable properly connected? Go to step 3. Properly connect cable. Reassemble and retest printer. 3 Check toner retract solenoid cable and connecting cable for visible damage. Is either cable damaged? Replace damaged cable or toner retract solenoid. Reassemble and retest printer. Go to step 4. 4 Disconnect toner retract solenoid cable from cable that attaches to I/O board. Check cable continuity from DCN4 pins 1 and 2 to connector that attaches to toner retract solenoid. Ensure that pins are not shorted. Is cable okay? Replace toner retract solenoid. Reassemble and retest printer. Replace cable. Reassemble and retest printer. 5 Reassemble and retest printer. Does 908 error reappear? Turn printer off and replace engine controller board. Problem solved.
Code: 910
Description: Developing motor (DM) error
Remedy: 1 Are there any unusual noises heard around developer motor or developer drive assembly before error posts? Replace toner cartridge (customer ordered supply). Go to step 2. Go to step 4. 2 Does noise go away? Problem solved. Replace developer motor and developer drive assembly. Go to step 3. 3 Does noise go away? Problem solved. Go to step 4. 4 Turn printer off and remove right cover. Is cable properly connected to developer motor? Go to step 5. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 5. 5 If waste toner bottle is removed, reinsert it. Ensure rear cover assembly is shut. Override top and front cover interlock switches. For location, Reconnect operator panel. Turn printer on. Allow printer to run until error posts. Disconnect connector from developer motor and check the following on disconnected cable connector: Pin 4 to pin 5—24VDC Pin 6 to pin 5—24VDC Pin 10 to pin 5—5VDC Are voltages present? Replace developer motor. Go to step 8 Go to step 6. 6 Remove I/O board shield. Disconnect DCN11 from I/O board. Check for continuity and shorted pins on cable that connects DCN11 to developer motor. Is cable okay? Go to step 7. Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 7. 7 Disconnect cable from DCN13 on I/O board. Check the following on disconnected cable connector: Pin 1 to pin 2—24VDC Pin 9 to pin 12—5VDC Are voltages present? Replace I/O board. Go step 8. Replace cable that connects ACN1 on LVPS to DCN13 on I/O board. Remove RIP board cage to gain access to cable. Go to step 8. 8 Reassemble and retest printer. Does error clear? Problem solved. Go to step 9. 9 Check cable that connects engine controller board connector I2CN to I/O board connector DCN3 for continuity and pin shorts. Is cable okay? Replace engine controller board. Replace cable.
Code: 911
Description: Main motor (MM) error
Remedy: 1 Turn printer off and remove right cover. Open top cover and override top cover interlock switch. Restart printer and observe main motor and photodeveloper cartridge OPC belt. Does main motor attempt to turn but OPC belt will not rotate? Replace photodeveloper cartridge. Note: Photodeveloper cartridge is a customer ordered supply. Go to step 2. 2 Observe main motor and fuser. Does main motor attempt to turn but fuser will not? Replace fuser assembly. Note: Fuser is a customer ordered supply. Go to step 3. 3 Are there any unusual noises around main motor before error posts? Replace main motor. Go to step 4. Go to step 5. 4 Does noise go away? Problem solved. Go to step 5. 5 Is cable properly connected to main motor? Go to step 6. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 6. 6 If waste toner bottle is removed, reinsert it. Ensure rear cover assembly cover is shut. Override top and front cover interlock switches. For location, Reconnect operator panel. Turn printer on. Allow printer to run until error posts. Disconnect connector from main motor and check the following on disconnected cable connector: Pin 4 to pin 5—24VDC Pin 6 to pin 5—24VDC Pin 10 to pin 5—5VDC Are voltages present? Replace main motor. Go to step 9. Go to step 7. 7 Remove I/O board shield. Disconnect DCN12 from I/O board. Check for continuity and shorted pins on cable that connects DCN12 to main motor. Is cable okay? Go to step 8. Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 8. 8 Disconnect cable from DCN13 on I/O board. Check the following on disconnected cable connector: Pin 1 to pin 2—24VDC Pin 9 to pin 12—5VDC Are voltages present? Replace I/O board. Go step 10. Replace cable that connects ACN1 on LVPS to DCN13 on I/O board. Remove RIP board cage to gain access to cable. Go to step 9. 9 Reassemble and retest printer. Does error clear? Problem solved. Go to step 10. 10 Check cable that connects engine controller board connector I2CN to I/O board connector DCN3 for continuity and pin shorts. Is cable okay? Replace engine controller board. Replace cable.
Code: 912
Description: Power supply fan (PSFAN) error
Remedy: 1 Turn printer off and remove I/O board shield. Is cable properly connected to I/O board connector DCN20? Go to step 2. Properly connect cable. 2 Ensure rear cover assembly cover is shut. Override top and front cover interlock switches. For location, Reconnect operator panel. Turn printer on and check for 24VDC between DCN20 pin 1 and power ground (you can touch negative lead of voltmeter to metal bracket that holds I/O board to obtain ground.) Is voltage present and correct? Replace power supply fan assembly. Retest printer. If error clears, problem solved, otherwise go to step 3. Replace I/O board. Retest printer. If error clears, problem solved, else go to step 3. 3 Turn printer off and check cable that connects engine controller board connector I1CN to I/O board connector DCN1 for continuity and pin shorts. Is cable okay? Replace engine controller board. Replace cable.