Preface; Malfunction Diagnosis Flowchart - Canon LBP-800 Service Manual

I. PREFACE
A. Malfunction Diagnosis Flowchart
The malfunctions that occur in the printer are mainly classified to five factors; "image defects",
"jams", "transport defect", "malfunction", and "malfunction status".
If a malfunction occurred in the printer, the service technician is to identify the factor accord-
ing to the flowchart and then to rectify the problem according to the action procedures of 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 speci-
fied terminal of the connector.
•Before handling PCBs, be sure to touch metal part of the printer to discharge static elec-
tricity, as it can cause damage to the PCBs.
•The laser/scanner unit cannot be adjusted in the field, so do not attempt to disassemble it.
CHAPTER 4
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