10.2. Troubleshooting-2 (According to error message on PC)10.2.1. Error CodeError Code Possible Cause Check Point RemarksClassified Code ST1 ST2 ST3 ST4Error Message“No paper!”“Please set thepaper.”(No paper error)- - - - 1. Documents are not set on theHopper tray.Set the documents on the tray.2. Paper dust exists on or aroundthe Paper sensor.Blow off the dirt with the accessory blower.(See Sec.7.)3. Paper Sensor is not workingcorrectly.1. Execute “Key / Sensor” test in theSec.9.3.6 to check the sensor condition.2. Check the sensor attachment condition.(whether the sensor attachment directionfaces to paper on the Hopper.)3. Check the following connection andsoldering condition on each connector.a. Paper Sensor to CN5021 (SIZEDETECTOR Board)b. CN5016 (SIZE DETECTOR Board) toCN5015 (HOPPER HOME Board)c. CN5012 (HOPPER HOME Board) toCN5010 (RELAY (LOWER) Board)d. CN5007 (RELAY (LOWER) Board) toCN1013 (CONTROL Board)4. Check the signal “*PAPER” condition: 0 V when paper exists.→ Monitor points: CN5021-2 nd pin,CN5016-7 th pin, CN5015-7 th pin,CN5012-2 nd pin, CN5010-2 nd pin,CN5007-5 th pin, CN1013-5 th pin5. Check the soldering condition of IC1034-2 nd and 18 th pins on the CONTROL Boardand repair it.6. Replace faulty parts or boards.U11(Paper feed jam:Paper did notreach the WaitingSensor)11 00 00 00 1. Paper Feed Roller Module orRetard Roller are not assembledcorrectly.1. Reassemble the rollers.2. Check the paper feed mechanism fromthe Paper Feed Motor’s gear to PaperFeed Roller’s gear. (See 6.4.)2. Rollers (Paper Feed, Separation,Retard) are dirty.1. Clean the rollers. (See Sec.7.)2. Clear counter for cleaning roller to zerowith the service utility’s operation in Sec.9.3. Rollers have reached their lifeexpectancy.1. Replace the Paper Feed, Separation, andRetard Rollers after checking each rollerconfiguration and Scanner Counter ofService Utility software.2. Clear counter for replacing roller to zerowith the above service utility.4. Paper dust exists on or aroundthe Waiting Sensor.1. Blow off the dirt with the accessoryblower. (See Sec.7.)2. Execute Key / Sensor and SensorSensitive Level tests in Sec.9.3.6 tocheck the sensor condition.99KV-S3065CLSERIES / KV-S3065CWSERIES