Remedy: 1 Check LCN connection on laser assembly LDU board. Is connector properly connected? Go to step 2. Properly connect LCN cable. If error clears, problem solved, otherwise go to step 2. 2 Check LCN connection on engine controller board. Is cable properly connected? Go to step 3. Properly connect LCN cable. If error clears, problem solved, otherwise go to step 3. 3 Check cable that connects engine controller board LCN and LDU LCN connectors for continuity and shorted pins. Is cable okay? Replace laser unit assembly. “Laser unit assembly (printhead) removal”. Go to step 4. Replace cable. Go to step 4. 4 Does error clear? Problem solved. Replace engine controller board. See “Engine controller board removal”.
Code: SVC LL
Description: Laser power error
Causes: Laser power is lower than the output limit.
Remedy: 1 Check LCN connection on laser assembly LDU board. Is connector properly connected? Go to step 2. Properly connect LCN cable. If error clears, problem solved, otherwise go to step 2. 2 Check LCN connection on engine controller board. Is cable properly connected? Go to step 3. Properly connect LCN cable. If error clears, problem solved, otherwise go to step 3. 3 Check cable that connects engine controller board LCN and LDU LCN connectors for continuity and shorted pins. Is cable okay? Replace laser unit assembly. “Laser unit assembly (printhead) removal”. Go to step 4. Replace cable. Go to step 4. 4 Does error clear? Problem solved. Replace engine controller board. See “Engine controller board removal”.
Code: SVC N3
Description: HVU (HVPS) connection error
Causes: Improper connection between engine controller board and HVPS.
Remedy: 1 Turn printer off and remove engine controller board shield. See “Engine controller board removal” for steps to remove shield. Is cable properly connected to engine controller board HVCN connector? Go to step 2. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 2. 2 Turn printer off and remove items to expose HVPS. See “High voltage power supply (HVPS) removal” for steps. Check for continuity and pin shorts of cable that connects engine controller board HVCN and HVPS BCN1. Is cable okay? Replace HVPS. See “High voltage power supply (HVPS) removal”. Retest printer. If error clears, problem solved, otherwise turn printer off and replace engine controller board. See “Engine controller board removal”. Replace cable. Retest printer. If error clears, problem solved, otherwise turn printer off and replace engine controller board. See “Engine controller board removal”.
Code: SVC N4
Description: Toner empty sensor error 1
Causes: Improper connection between engine controller board and toner sensor sender board.
Remedy: 1 Turn printer off and remove engine controller board board shield. See “Engine controller board removal” for steps to remove engine controller board shield. Is cable properly connected to engine controller board connector MCN8? Go to step 2. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 2. 2 Check the following for continuity between engine controller board MCN8 cable and toner empty sensor (sender-TPD) cable. See “Toner sensor (sender) removal” for steps to gain access to sensor cable. MCN8 Toner empty sensor sender pin 1 pin 1 pin 3 pin 2 pin 5 pin 3 Also check for shorted pins. Is cable okay? Go to step 3. Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 3. 3 Replace toner empty sensor (sender-TPD). See “Toner sensor (sender) removal” for steps. Retest printer. Does error clear? Problem solved. Go to step 4. 4 Replace engine controller board. See “Engine controller board removal”. POR printer. Does error clear? Problem solved. Contact higher level support.
Code: SVC N5
Description: Toner empty sensor error 2
Causes: Improper connection between engine controller board and toner sensor receiver board.
Remedy: 1 Turn printer off and remove engine controller board board shield. See “Engine controller board removal” for steps to remove engine controller board shield. Is cable properly connected to engine controller board connector MCN8? Go to step 2. Properly connect cable. Retest printer. If error clears, problem solved, otherwise go to step 2. 2 Check the following for continuity between engine controller board MCN8 cable and toner empty sensor receiver-TTR) cable. See “Toner sensor (receiver) removal” for steps to gain access to sensor cable. MCN8 Toner empty sensor sender pin 2 pin 1 pin 4 pin 2 pin 6 pin 3 pin 8 pin 4 pin 9 pin 5 pin 10 pin 6 Also check for shorted pins. Is cable okay? Go to step 3. Replace cable. Retest printer. If error clears, problem solved, otherwise go to step 3. 3 Replace toner empty sensor (receiver-TTR). See “Toner sensor (receiver) removal” for steps. Retest printer. Does error clear? Problem solved. Go to step 4. 4 Replace engine controller board. See “Engine controller board removal”. POR printer. Does error clear? Problem solved. Contact higher level support.