3-54 Phaser 6121MFP Service ManualError Messages and CodesUsing the Troubleshooting Procedures1. Applicable Status Code(s) lists the error message(s) addressed by eachtroubleshooting procedure.2. Applicable Parts and Wiring and Plug/Jack References assist you in locatinginformation available for a particular part or procedure.3. Follow each step in a troubleshooting procedure sequentially in the ordergiven until the problem is fixed or resolved.4. The Actions and Questions box instructs you to perform a certain action orprocedure. Also included are precautions and/or additional procedures youmust follow to isolate the problem.5. Some actions are followed by a question. If your response to the question isYes, then follow the instructions for a Yes reply. If your response to thequestion is No, then follow the instructions for a No reply.6. Note that two types of photo sensors are used: photo-reflective and photo-receptive. Photo-reflective sensors use light reflected back from an object todetect its presence or absence. Photo-receptive sensors use an actuator or theobject itself to block the light path to detect an object or condition.7. Troubleshooting procedures frequently ask you to take voltage readings ortest for continuity or resistance at certain test points. The Wiring and Plug/JackReferences table provides pointers to the diagrams that provide thisinformation.8. Troubleshooting procedures often ask you to replace a printer component.When instructed to replace a non-spared component and that component ispart of a parent assembly, replace the entire parent assembly.Measurement Techniques1. Unless indicated otherwise, the instruction “switch On printer power” meansfor you to switch On printer power and let the printer proceed through PowerOn Self Test (POST) to a ‘Ready’ condition.2. Conventions used in this manual to represent connectors.3. When instructed to take voltage, continuity or resistance readings on wiringharness, proceed as follows; Check P/J 232–1 to P/J 210–5 by placing the redprobe (+) of your meter on pin 1 of P/J 232, and place the black probe (–) ofyour meter on pin 5 of P/J 210.4. When you are instructed to take resistance readings between “P/J 232 <=>P/J 210” (without specified pin numbers), check all pins. Refer to the section“Wiring Diagrams” for the location of all wiring harnesses and pins.5. When you are instructed to run a test, run the Service Diagnostics testassociated with the component being examined.6. When you are instructed to take a voltage reading, the black probe (–) isgenerally connected to a pin that is either RTN (Return) or SG (Signal Ground).You can substitute any RTN pin or test point in the printer, and you can use FG(frame ground) in place of any SG pin or test point.7. Before measuring voltages make sure the printer is switched On, the ImagingUnit and the paper trays are in place, and the interlock switch is actuated,unless a troubleshooting procedure instructs otherwise.8. All voltage values given in the troubleshooting procedures are approximatevalues. The main purpose of voltage readings is to determine whether or not acomponent is receiving the correct voltage value from the power supply and ifP/JxxYYPlug and Jack
