Lexmark X 850 Owners Manual
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Diagnostic information2-133 7500-XXX 843.00 Sensor (scanner HP) failure Step Check Yes No 1 Check the scanner carriage rails. Is there any foreign substance on the scanner rails?Clean and lubricate the scanner carriage rails.Go to step 2. 2 Check the sensor (scanner HP) for operation. Perform the sensor (scanner HP) test. Remove the large platen glass. Go to “Large platen glass removal” on page 4-142. 1. Enter the Diagnostics Menu. 2. Touch SCANNER TESTS. 3. Touch Sensor Tests. 4. Touch Scanner HP. Gently move the scanner carriage side to side. Does the display on the operator panel change every time the sensing area of the above sensor is blocked?Go to step 4. Go to step 3. 3 Check the sensor (scanner HP) for connection. Is the above sensor connected properly?Replace the sensor (scanner HP). Go to “Sensor (scanner HP) removal” on page 4-151.Replace the connection. 4 Check the scanner drive motor assembly. Perform the scanner drive motor test. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Scanner Motor Tests. 4. Touch Scanner drv mtr. 5. Touch Forward or reverse. Does the scanner drive motor assembly operate properly?Go to step 6. Go to step 5. 5 Check the scanner drive motor assembly for connection. Is the above motor connected properly?Replace the scanner drive motor assembly. Go to “Scanner drive motor assembly removal” on page 4-155.Replace the connection. 6 Place media on the large platen and perform a scanner test. Does the error remain?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved.
2-134MFP Service Manual 7500-XXX 843.01 Scanner carriage over run failure 843.10 ADF RAM test failure 843.11 ADF EEPROM failure Step Check Yes No 1 Check the connections of the scanner controller card assembly. Are the connectors of the scanner controller card assembly connected properly?Go to step 2. Connect each connector of the scanner controller card assembly properly. 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No 1 Check the connection between the ADF controller card assembly and the scanner controller card assembly Are the ADF controller card assembly and the scanner controller card assembly connected properly?Replace the ADF controller card assembly. Go to “ADF controller card assembly removal” on page 4-167.Connect the ADF controller card assembly and the scanner controller card assembly properly. 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Go to step 3. Step Check Yes No 1 Check the connection of each ADF controller card assembly connector. Is each connector of ADF controller card assembly connected properly?Go to step 2. Connect each connector of ADF controller card assembly properly.
Diagnostic information2-135 7500-XXX 843.12 ADF pick roll position lift up failure 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the ADF controller card assembly. Go to “ADF controller card assembly removal” on page 4-167.Problem solved. Step Check Yes No 1 Check the feed/pick roll assembly. Remove the left cover media guide. Does The feed/pick roll assembly moves smoothly up/down when the gears are manually rotated?Go to step 2. Replace the feed/ pick roll assembly. 2 Check the sensor (pick roll position HP) for operation. Perform the sensor (pick roll position HP) test. Open the ADF left cover assembly. Remove the ADF left cover media guide. Go to “ADF left cover media guide removal” on page 4-181. 1. Enter the Diagnostics Menu. 2. Touch SCANNER TESTS. 3. Touch Sensor Tests. 4. Touch Pick roll position HP. Manually rotate the gears of the pick roll position motor assembly to raise and lower the pick roll. Does the display on the operator panel change every time the sensing area of the above sensor is blocked?Go to step 4. Go to step 3. 3 Check the sensor (pick roll position HP) for connection. Is the above sensor connected properly?Replace the sensor (pick roll position HP). Go to “Sensor (pick roll position HP) removal” on page 4-177.Replace the connection. 4 Check the pick roll position motor assembly. Perform the pick roll position motor test. Open ADF left cover assembly. Override the switch (ADF left cover interlock). 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Scanner Motor Tests. 4. Touch Pick roll position mtr. Does the pick roll position motor assembly raise and lower properly?Go to step 6. Go to step 5. Step Check Yes No
2-136MFP Service Manual 7500-XXX 843.20 Scanner unit assembly connection failure 843.21 Scanner unit assembly EEPROM failure 5 Check the pick roll position motor assembly for connection. Is the above motor connected properly?Replace the pick roll position motor assembly. Go to “Pick roll position motor assembly removal” on page 4-182.Replace the connection. 6 Place an undamaged document in the ADF, and perform a ADF test. Does the error remain?Replace the ADF controller card assembly. Go to “ADF controller card assembly removal” on page 4-167.Go to step 7. Step Check Yes No 1 Check the connection of each ADF controller card assembly connector. Is each connector of ADF controller card assembly connected properly?Go to step 2. Connect each connector of ADF controller card assembly properly. 2 Check the connection of each RIP card assembly connector. Are the connectors of the RIP card assembly connected properly?Go to step 3. Connect each connector of the RIP card assembly properly. 3 Perform a POR. Does the error remain when the power is turned off/on?Replace the ADF controller card assembly. Go to “ADF controller card assembly removal” on page 4-167.Problem solved. Step Check Yes No 1 Check the connections of the scanner controller card assembly connector Is each connector of scanner controller card assembly connected properly?Go to step 2. Connect each connector of the scanner controller card assembly properly. Step Check Yes No
Diagnostic information2-137 7500-XXX 843.22 Scanner unit assembly EEPROM sub system failure 843.23 Scanner cooling fan failure 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the ADF controller card assembly. Go to “ADF controller card assembly removal” on page 4-167.Problem solved. Step Check Yes No 1 Check the connection of each scanner controller card assembly connector. Are the connectors of the scanner controller card assembly connected properly?Go to step 2. Connect each connector of the scanner controller card assembly properly. 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No 1 Check the scanner cooling fan operation. Perform the scanner cooling fan test. Remove the rear upper cover. Go to “Rear upper cover removal” on page 4-15. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Scanner Motor Tests. 4. Touch Scanner cooling fan. Does the scanner cooling fan speed increase when the test is performed?Go to step 2. Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143. 2 Check the scanner cooling fan for connection. Is the above fan connected properly?Replace the scanner cooling fan. Go to “Scanner cooling fan removal” on page 4-156.Replace the connection. Step Check Yes No
2-138MFP Service Manual 7500-XXX 843.24 Image processing failure 843.25 Scanner controller card assembly failure 1 3 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No 1 Check the connections of the scanner controller card assembly. Are the connectors of the scanner controller card assembly connected properly?Go to step 2. Connect each connector of the scanner controller card assembly properly. 2 Check the software version for the scanner controller card assembly. Is the version of the software of the scanner controller card assembly correct?Go to step 3. Upgrade the software of the scanner controller card assembly. 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No 1 Check the connection of each scanner controller card assembly connector. Is each connector of scanner controller card assembly connected properly?Go to step 2. Connect each connector of scanner controller card assembly properly. 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No
Diagnostic information2-139 7500-XXX 843.26 Scanner controller card assembly failure 2 844.00 Exposure lamp failure 3 Perform a POR. Does the error remain when the power is turned off/on again?Replace the scanner PS card assembly. Go to “Scanner PS card assembly removal” on page 4-154.Problem solved. Step Check Yes No 1 Check the connection of each scanner controller card assembly connector. Is each connector of scanner controller card assembly connected properly?Go to step 2. Connect each connector of scanner controller card assembly properly. 2 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. 3 Perform a POR. Does the error remain when the power is turned off/on again?Replace the scanner PS card assembly. Go to “Scanner PS card assembly removal” on page 4-154.Problem solved. Step Check Yes No 1 Check the exposure lamp for operation. Perform the exposure lamp test. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Scanner Motor Tests. 4. Touch Exposure lamp. Does the exposure lamp operate properly?Go to step 6. Go to step 3. Step Check Yes No
2-140MFP Service Manual 7500-XXX 844.01 White reference/exposure lamp illumination failure 2 Check the exposure lamp for connection. Is the above component connected properly?Replace the exposure lamp. Go to “Exposure lamp removal” on page 4-158.Replace the connection. 3 Check the exposure lamp PS card assembly. Is the above card properly connected to the scanner controller card assembly?Replace the exposure lamp PS card assembly. Go to “Exposure lamp PS card assembly removal” on page 4-157.Replace the connection. 4 Check the scanner PS card assembly for connection. Is the above card connected properly?Replace the scanner PS card assembly. Go to “Scanner PS card assembly removal” on page 4-154.Replace the connection. 5 Perform a POR. Does the error remain when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No 1Check the large platen glass. Is the large platen glass installed properly?Go to step 2. Remove and clean the large platen glass. Go to “Large platen glass removal” on page 4-142. Reinstall the large platen glass properly. Go to step 3. Step Check Yes No
Diagnostic information2-141 7500-XXX 2Remove the large platen glass. Check the bottom of the large platen glass in the vicinity the white reference strip for contamination. Is the vicinity of white reference strip contaminated?Clean the bottom of the large platen glass in the vicinity of the white reference strip. Reinstall the large platen glass properly. Go to step 3.Go to step 4. 3Perform a POR. Does the error remain?Go to step 4. Problem solved. 4Check the exposure lamp for operation. Perform the exposure lamp test. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Scanner Motor Tests. 4. Touch Exposure lamp. Does the exposure lamp operate properly?Go to step 8. Go to step 5. 5Check the exposure lamp for connection. Is the above component connected properly?Replace the exposure lamp. Go to “Exposure lamp removal” on page 4-158.Replace the connection. 6Check the exposure lamp PS card assembly. Is the above card properly connected to the scanner controller card assembly?Replace the exposure lamp PS card assembly. Go to “Exposure lamp PS card assembly removal” on page 4-157.Replace the connection. 7Check the scanner PS card assembly for connection. Is the above card connected properly?Replace the scanner PS card assembly. Go to “Scanner PS card assembly removal” on page 4-154.Replace the connection. 8Perform a POR. Does the error continue when the power is turned off/on?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No
2-142MFP Service Manual 7500-XXX 845.00 CCD failure 845.01 CCD initialization (lamp on) failure Step Check Yes No 1 Check the CCD/lens assembly connection. Is the CCD/lens assembly connected properly?Go to step 2. Replace the connection. 2 Check all the connections on the scanner controller card assembly. Are all the connections connected properly?Replace the CCD/lens assembly.Replace the connection. 3 Perform a POR. Does the error remain?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143. Step Check Yes No 1 Check the exposure lamp for operation. Perform the exposure lamp test. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Scanner Motor Tests. 4. Touch Exposure lamp. Does the exposure lamp operate properly?Go to step 6. Go to step 3. 2 Check the exposure lamp for connection. Is the above component connected properly?Replace the exposure lamp. Go to “Exposure lamp removal” on page 4-158.Replace the connection. 3 Check the exposure lamp PS card assembly. Is the above card properly connected to the scanner controller card assembly?Replace the exposure lamp PS card assembly. Go to “Exposure lamp PS card assembly removal” on page 4-157.Replace the connection. 4 Check the scanner PS card assembly for connection. Is the above card connected properly?Replace the scanner PS card assembly. Go to “Scanner PS card assembly removal” on page 4-154.Replace the connection.