Lexmark C760 Service Manual
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Diagnostic information2-115 5060-4xx Envelopes do not feed from the tray or do not feed correctly Step Action and questions Yes No 1 Check the envelope feeder tray to make sure it is installed correctly. Is the tray installed correctly? Go to step 2 Install the tray correctly 2Check the tray to make sure it has been setup correctly for the size of envelopes being used. Has the tray been setup correctly? Go to step 3 Set the tray up correctly 3Check the tray for any signs of broken or damaged parts. Are there any signs of damage to the tray or parts in the tray? Replace the envelope feeder tray Replace the envelope feeder option
2-116Service Manual 5060-4 xx Finisher service check If a failure is detected by the system board, an error may be displayed. The LEDs on the HCOF system board can help in diagnosing the errors. HCOF error code table LEDs lit by number Description 33 34 35 36 37 38 39 42 x Error detected by Punch Timing Sensor x Error detected by Inverter Jam Sensor x x Error detected by Drop Timing Sensor x Error detected by Exit Timing Sensor x x Error detected for the Jogger Motor x x Error detected for the Punch Motor x x x Error detected for the Stapler Motor x Error detected for the Belt Motor x x Error detected for the Tray Motor x x HCOF detects the front door is open x x x Error detected with the communications to the printer x x Error detected for the Offset Motor x x x Tray Near Full is detected x x x x Tray Full is detected x Error detected with Stapler - Stapler not mounted correctly x x Error detected with Stapler - Stapler Cartridge not installed correctly x x Error detected with Stapler - runs short x x x Error detected with Punch Timing Sensor - media not reaching sensor x x Error detected with Inverter Jam Sensor - media not reaching sensor x x x Error detected with Drop Timing Sensor - media not reaching sensor x x x Error detected with Exit Timing Sensor - media not reaching sensor x x x x Error detected with Chad Box - box full
Diagnostic information2-117 5060-4xx Check Finisher displayed, unable to clear message Step Action and questions Yes No 1 Check for correct printer and finisher installation. Make sure the magnetic bracket is mounted on the printer. Is the magnetic bracket mounted? Go to step 2 If not installed, install the bracket 2Is the pin on the magnetic bracket actuating the joint switch in the finisher? Go to step 3 Find out why the pin is not actuating the switch and repair as necessary 3Check the joint switch cable connection to CN19 on the finisher system board. Is the cable installed correctly? Go to step 4 Install the cable correctly 4Check the joint switch activating spring for any signs of damage. Is the switch activating spring broken? Replace the joint switch assembly Go to step 5 5Check the joint switch for correct operation. The switch can be checked by measuring continuity while actuating the switch. Is the switch operating correctly? Go to step 6 Replace the joint switch assembly 6Check continuity of the joint switch cable. Is there continuity? Replace the finisher system boardReplace the cable
2-118Service Manual 5060-4 xx Finisher is inoperative, or not recognized This problem can be caused by a problem with the autoconnect system between the finisher and the printer. It also can be caused by a problem with the power system in the finisher. Step Action and questions Yes No 1 Check the AC line cord to the finisher to make sure the options and printer are connected properly. Are the printer and options AC line cords connected properly? Go to step 2 Connect the printer and options correctly 2Make sure the communications cable from the finisher to the printer is installed correctly at the output options autoconnect on the printer. Is the cable installed correctly? Go to step 3 Install the cable correctly 3Disconnect the autoconnect cable from J2 on the system board. Check the resistance between J2-6 and J2-7 on the cable connector. The resistance measures between 45 ohms and 50 ohms. Is the resistance correct? Go to step 6 Go to step 4 4Make sure the communications cable is connected properly to CN3 on the LVPS relay board. Is the cable installed correctly? Note : The relay on the relay board is connected to +5 V dc from the printer through the communications cable. When the printer is powered on, +5 V dc is sent to the finisher relay board relay coil which energizes the relay and connects primary AC line voltage to the LVPS. Go to step 5 Install the cable correctly 5Check the resistance of the relay coil by measuring between CN3-1 and CN3-2 on the relay board. The resistance measures between 45 ohms and 50 ohms. Is the resistance correct? Replace the communication cable Replace the relay board/LVPS assembly 6Check the voltage on the output options autoconnect connector Pin 2 located on the top right rear of the printer. The voltage measures approximately +5 V dc. Is the voltage correct? Go to step 7 Go to step 10 7Check the AC line voltage between CN2-1 and CN2-3 on the relay board. The line voltage should be within specifications for the AC power source the printer is connected to. Is there line voltage at CN2?Replace the LVPS assembly Go to step 8 8Check the AC line voltage between CN1-1 and CN1-5 on the relay board. The line voltage should be within specifications for the AC power source the printer is connected to. Is there line voltage at CN1? Replace the relay board assembly Go to step 9 9Check continuity of the AC line cord. Is there continuity? Go to step 10 Replace the line cord
Diagnostic information2-119 5060-4xx Front door is open, no indication on display Fan in finisher inoperative 10Check the voltage at J2-5 on the system board. The voltage measures approximately +5 V dc. Is the voltage correct? Replace the top options cable Replace the system board Step Action and questions Yes No 1 Make sure the front door is activating the cover switch. Is the door activating the cover switch? Go to step 2 Repair or replace the door assembly 2Check door - door switch activating tab (broken or missing). Is the front door and door activating tab damaged, broken or missing? Replace the front door assembly Go to step 3 3Check the front door magnetic latches to make sure the front door closes correctly. Are the magnetic latches functioning properly? Go to step 4 Replace the magnetic latches 4Check the front door switch cable connection to CN11 on the finisher system board. Is the cable connected correctly? Go to step 5 Install the cable correctly 5Check the continuity of the front switch as the switch is activated. Do you measure continuity? Go to step 6 Replace the front door switch 6Check continuity of the front door switch cable. Do you measure continuity? Replace the finisher system boardReplace the front door switch cable D1 Step Action and questions Yes No 1 Make sure the fan cable, H6, is correctly connected to CN21 on the finisher system board. Is the cable connected correctly? Go to step 2 Install the cable correctly 2Check the cable H6 connection to the fan assembly. Is the cable connected correctly? Go to step 3 Install the cable correctly 3Check the voltage between CN21-1 and CN21-2. The voltage measures approximately +24 V dc. Is the voltage correct? Go to step 4 Replace the finisher system board 4Check continuity of the fan cable H6. Do you measure continuity? Replace the fan assembly Replace cable H6 Step Action and questions Yes No
2-120Service Manual 5060-4 xx No indication that the chad box is full, no message Chad Box Full message when chad box is not full Step Action and questions Yes No 1 Make sure the chad box is correctly installed in the finisher. Is the chad box correctly installed? Go to step 2 Install the chad box correctly 2Make sure the chad box cable S5 is properly connected to CN5 on the finisher system board. Is the cable properly connected? Go to step 3 Install the cable correctly 3Make sure the chad box cable is properly connected to the chad box sensor located above the box. Is the cable properly connected to the sensor? Go to step 4 Install the cable correctly 4Check the chad box sensor with a voltmeter. Empty the chad box. Check the voltages on CN5. The voltages read the following approximate values with the chad box empty: Are the voltages correct? Go to step 5 Replace the finisher system board 5Check the sensor by placing the chad box or a piece of paper in front of the sensor. As the chad box or piece of paper is moved away from the front of the sensor the voltage on CN5-2 should change from +5 V dc to 0 V dc. Does the voltage change? Problem solved Replace the chad box sensor. Step Action and questions Yes No 1 Make sure the chad box is correctly installed in the finisher. Is the chad box correctly installed? Go to step 2 Install the chad box correctly 2Check the chad box sensor with a voltmeter. Empty any material that is in the Chad Box. Measure the voltage on CN5-2. The voltage changes from approximately +5 V dc to 0 V dc as the sensor is activated. Does the voltage change? The sensor is working correctly Replace the finisher system board Connector pin Voltage CN5-1 +5 V dc +5 V dc supply CN5-2 +5 V dc sensor signal CN5-3 0 V dc Ground
Diagnostic information2-121 5060-4xx HCIT 2000-sheet option service check HCIT system board LED error code table If a failure is detected by the system board, an error code may be displayed. If the system board LED is on solid, the HCIT detects that the tray or side door is not closed. The LED on the system board may blink. Count the number of times the LED blinks and use the following table to determine the problem. LED blinks Problem 1 Jam at registration sensor S2 2 Jam before the leading edge of the paper reaches the registration sensor S2 3 Paper jam is still detected in the HCIT after removing the jam 4 Paper jam is still detected even with front of jam door closed 5 Paper jam detected at pick sensor 6 Error detected with the tray 7 Error detected at the registration roller home position 8 Error detected at the pick roller home position sensor (S1) 9 Error detected with the lift motor - no motor lock or loss of lock 10 Not used 11 Communication error 12 Other error - Failure of the adjustment of the mirror reflection sensors or EEPROM initialization
2-122Service Manual 5060-4 xx Printer does not recognize that the HCIT 2000-sheet option is installed. Step Action and questions Yes No 1 Is the HCIT 2000-sheet option the only paper input option that is not recognized? Go to step 5 Go to step 2 2Make sure that the printer and any option above the HCIT 2000-sheet option are installed correctly. Are the printer and any options installed correctly?Go to step 3 Install the options correctly and recheck performance 3Check for correct installation of the lower options autoconnect cable to system board connector J37. Is the cable to J37 installed correctly? Go to step 4 Install the cable correctly and recheck performance 4Disconnect J37 from the system board and check the voltages on connector J37 on the system board. Note: All voltages are approximate values: Are the voltages correct? Go to step 5 Replace the system board 5Autoconnect cables - Check the autoconnect from the printer or option above the HCIT 2000-sheet option. Check for any signs of cuts, pinched wiring, or damage to the contacts in the connector. Are there any problems with the autoconnect cables? Repair or replace as necessary Go to step 6 6HCIT autoconnect cable - Check the HCIT autoconnect cable for correct installation at the HCIT system board. Is the cable installed correctly? Go to step 7 Install the cable correctly 7HCIT autoconnect cable continuity - Check the continuity of the HCIT autoconnect cable(s). Is there continuity? Replace HCIT system board Replace the HCIT autoconnect cable Connector pin Voltage J37-1 +5 V dc J37-2 Ground J37-4 +5 V dc J37-5 +24 V dc J37-7 +5 V dc J37-8 +5 V dc
Diagnostic information2-123 5060-4xx HCIT inoperative Before proceeding with this service check make sure the 2000-sheet tray option is properly connected to AC power. If a finisher is installed: The AC jumper should go from the HCIT to the finisher. The finisher AC power cord should attach to the AC voltage source. The base printer power cord should plug into the AC output connector on the HCIT. If a finisher is not installed: The printer power cord plugs into the HCIT AC outlet and the power cord from the HCIT plugs into the AC voltage source. Note: Make sure the electrical outlet is working properly and all power cords are plugged in correctly. Make sure the slide switch on the LVPS is toward the right. The system board status LED can be observed by removing the rear cover. The LED is mounted on the HCIT system board. Step Action and questions Yes No 1 Does the printer power up and work normally when plugged into the AC outlet on the HCIT? Go to step 2 Go to step 5 2Check the system board LED. Is it is on solid or blinking? On solid means that the HCIT has detected the front door or side door open. Blinking means that the system is operating. Is the LED on solid or blinking? If the LED is on solid, check the front and side doors. If the LED is blinking, replace the HCIT system boardGo to step 3 3Measure the voltage at TP3 (+5 V dc test point) on the HCIT system board. The voltage should measure approximately +5 V dc. Is the voltage correct? Replace the HCIT system board Go to step 4 4Measure the voltage at CN2 pin 2 on the HCIT system board. The voltage should measure approximately +5 V dc. Is the voltage correct? Replace the HCIT system board Go to step 5 5Check the AC line voltage at the input to the LVPS. Is the voltage correct? Replace the HCIT LVPS Go to step 6 6Check the AC cable from the HCIT AC inlet to the LVPS. Are the cables good? Determine where the AC line voltage is being lost to the HCIT. Repair as necessary.Replace the cables
2-124Service Manual 5060-4 xx HCIT 2000-sheet option does not recognize the size paper selected. Fuser drive assembly noise check Excessive fuser drive motor assembly noise Step Action and questions Yes No 1 Make sure the media loaded in the tray meets specifications. Is the media loaded properly and meet specifications? Go to step 2 Load the media properly or inform the customer that the media does not meet specifications 2Check the paper tray guide for correct installation. Is the paper tray guide installed correctly for the selected paper size? Go to step 3 Reinstall the guide if installed incorrectly 3Check for correct installation of the paper size sensor cable to the HCIT system board at CN7. Is the cable installed correctly? Go to step 4 Install the cable correctly. 4Check for a broken, loose, or missing paper size sensor flag spring. Is a sensor flag spring broken, loose, or missing? Reconnect the spring if it is loose. Replace the spring if broken or missing.Go to step 5 5Check the paper size sensor flag for sticking or broken parts. Is the paper size sensor flag sticking or broken? Replace the paper size flag Go to step 6 6Check continuity of the sensor cable. Do you measure continuity? Replace the sensor. If this does not fix the problem, replace the HCIT system board.Replace the sensor cable Step Action and questions Yes No 1 Excessive noise from the fuser drive motor assembly - Check for correct installation of the fuser drive assembly. Is the fuser drive installed correctly? Go to step 2 Correctly install the “Fuser drive assembly” on page 4-37 2Install a new “Fuser assembly” on page 4-35 . Is there still excessive noise from the fuser drive motor assembly? Replace the “Fuser drive assembly” on page 4-37Problem resolved.