Introduction; Precautions - Brother FAX-2840 Service Manual

1. INTRODUCTION

Troubleshooting is the countermeasure procedures that the service personnel should follow if
an error or malfunction occurs with the machine. It is impossible to anticipate all of the possible
troubles which may occur in future and determine the troubleshooting procedures, so this
chapter covers some sample troubles. However, those samples will help the service personnel
pinpoint and repair other defective elements.
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Precautions

Be sure to observe and follow all the precautions to prevent any secondary problems from
happening during troubleshooting.
(1) Be sure to unplug the AC cord before removing any covers or PCBs, adjusting the
machine, or conducting continuity tests using a tester.
(2) When connecting or disconnecting cable connectors, make sure that you hold the
connector body and not the cables.
(3) Static electricity charged in your body may damage electronic parts.
Before handling the PCBs, touch a metal portion of the machine to discharge static
electricity charged in your body.
When transporting PCBs, be sure to wrap them in conductive sheets.
When replacing the PCBs, put on a grounding wrist band and perform the job on a
conductive mat. Also take care not to touch the conductor sections on the flat cables.
(4) Follow the warning by all means.
WARNING
Hazard labels as shown below are attached to the machine. Fully understand the
descriptions on the hazard labels and observe them during troubleshooting. Take
extreme care not to remove or damage the hazard labels.
DO NOT use flammable substances, any type of spray, or an organic solvent/liquid
containing alcohol or ammonia to clean the inside or outside of the product. Doing so
could cause a fire or electrical shock. Instead, use only a dry, lint-free cloth.
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