Preface - Canon CLBR 460ps Service Manual

I. PREFACE
A. Malfunction Diagnosis Flowchart
The malfunctions that occur in the printer are mainly classified to five factors; "image defects",
"paper jams", "paper transport troubleshooting", "malfunction troubleshooting", and "malfunc-
tion status 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 metal part of the printer to discharge static electric-
ity, 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.
In some cases, the cause of malfunction cannot be distinguished between the printer and the
video controller as the specifications of the video controller differ depending on the OEM.
Therefore, in this chapter, it is assumed that the video controller installed in the printer is nor-
mal.
CHAPTER 4
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