Error Messages and Codes 21Using the Troubleshooting Procedures1. Each Step in a Troubleshooting Procedure instructs you to perform a certain actionor procedure. The steps are to be followed sequentially in the order given until theproblem is fixed or resolved.2. The Actions and Questions box contains additional information and/or additionalprocedures you must follow to isolate the problem.3. When a procedure instructs you to test a component using service diagnostics, See"Service Diagnostics" on page 23 for the detailed steps and functions for testingparts of the printer.4. The action is followed by a question. If your response to the question is ìYesî,then follow the instructions for a ìYesî reply. If your response to the question isìNoî, then follow the instructions for a ìNoî reply.5. Troubleshooting Procedures may ask you to take voltage readings or test forcontinuity at certain test points within the printer. For detailed diagrams, refer tothe section "Plug/Jack Locator Maps" on page 341 and "Wiring Diagrams" onpage 351 for complete information on test point locations and signal names.6. Troubleshooting Procedures often ask you to replace a printer component. Thesection "FRU Disassembly - Removal and Replacement Procedures" on page 119provides detailed steps for removing and replacing all major parts of the printer.The section "FRU Parts List" on page 253 details the location, quantity and partnumber for all spared parts of the printer.General Notes on Troubleshooting1. Unless indicated otherwise, the instruction ìswitch ON printer main powerî meansfor you to switch ON printer power and let the printer proceed through POST to aëReadyí condition.3. When instructed to take voltage, continuity or resistance readings on wiringharness, proceed as follows; Check P/J 232ñ1 to P/J 210ñ5 by placing the redprobe (+) of your meter on pin 1 of P/J 232, and place the black probe (ñ) of yourmeter on pin 5 of P/J 210.4. When you are instructed to take resistance readings between ìP/J 232 <=> P/J210î (without specified pin numbers), check all pins. Refer to the the section"Wiring Diagrams" on page 351 for the location of all wiring harnesses and pins.5. When you are instructed to take a voltage reading, the black probe (ñ) is generallyconnected to a pin that is either RTN (Return) or SG (Signal Ground). You cansubstitute any RTN pin or test point in the printer, and you can use FG (frameground) in place of any SG pin or test point.6. Before measuring voltages make sure the printer is switched ON, the Imaging Unitand the paper trays are in place, and the interlock switches are actuated, unless atroubleshooting procedure instructs otherwise.2. Conventions used to represent connectorsPlug JackS6200-282
