CHAPTER 4
I.PREFACE
A.Malfunction Diagnosis Flowchart
The malfunctions that occur in the printer fall into five main factors; “image defects,” “paper jams,” “paper transport troubleshooting,” “malfunction troubleshooting,” and “malfunction sta- tus troubleshooting.”
If a malfunction occurred in the printer, the service technician is to find the factor according to the malfunction diagnosis flowchart and to clear the problem following the action procedure for each malfunction.
Make sure the following points at the execution of troubleshooting.
•Be sure that the connector has no poor contact when measuring the voltage at the specified terminal of the connector.
•Before handling PCBs, be sure to touch a metal part of the printer to discharge static elec- tricity, as it can cause damage to the PCBs.
•Do not attempt to disassemble the laser/scanner unit as it cannot be adjusted in the field.
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