Preface - Canon DU-82 Service Manual

I. PREFACE
A. Malfunction Diagnosis Flowchart
The malfunctions that occur in the duplexing unit are classified into five types; "image defects",
"paper jams", "paper transport malfunction", "operation malfunction", and "malfunction status".
If a malfunction occurred in the duplexing unit, the service technician is to find which type
the malfunction falls into using the malfunction diagnosis flowchart and to clear the problem
according to the troubleshooting procedures for each malfunction type.
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.
CHAPTER 4
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