Brother DCP-7090, Руководство по обслуживанию

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CH CH AP AP TE TE R 2 R 2 ER ER RO RO R I R I ND ND IC IC A A TIO TIO NS NS AN AN D D
TROUBLESHOOTING TROUBLESHOOTING
1 1 . . I I N N T T R R O O D D U U C C T T I I O O N N
Troubleshooting is the countermeasure procedures that the service personnel should follow if 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
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
troubles which may occur in future and determine the troubleshooting procedures, so this
chapter covers some sample troubles.
chapter covers some sample troubles. However, those samples will help the service personnel However, those samples will help the service personnel
pinpoint and repair other defective elements. pinpoint and repair other defective elements.
1 1..1 1 P Prre ec ca au uttiio on ns s
Be sure to observe and follow all the precautions to prevent any secondary problems from Be sure to observe and follow all the precautions to prevent any secondary problems from
happening during troubleshooting.
happening during troubleshooting.
(1) (1) Always t Always turn OFF the po urn OFF the power and un wer and unplug the po plug the power cabl wer cable before rem e before removing any c oving any covers or overs or
PCBs, adjusting the machine and so on. If you need to take voltage measurements with the PCBs, adjusting the machine and so on. If you need to take voltage measurements with the
power switched on, take the greatest of care not to receive an electric shock.
power switched on, take the greatest of care not to receive an electric shock.
(2) (2) When con When connectin necting or discon g or disconnectin necting cable co g cable connector nnectors, make su s, make sure that you h re that you hold the old the
connector body and not the cables. connector body and not the cables.
(3) (3) St Static elec atic electricit tricity charged in you y charged in your body may damag r body may damage electron e electronic part ic parts. Before hand s. Before handling the ling the
PCBs, touch a metal portion of the machine to discharge static electricity charged in your PCBs, touch a metal portion of the machine to discharge static electricity charged in your
body
body. When transporting PCB . When transporting PCBs, be sure to wrap s, be sure to wrap them in conductive sheets. them in conductive sheets.
When replacing the PCBs, put on a grounding wrist band and perform the job on an When replacing the PCBs, put on a grounding wrist band and perform the job on an
antistatic mat. Also take care not to touch the conductor sections on the flat cables.
antistatic mat. Also take care not to touch the conductor sections on the flat cables.
(4) (4) Fol Follow low the the war warnin ning by a g by all m ll mean eans. s.
Warning Warning
Hazard labels as shown below are attached to the machine. Fully understand the Hazard labels as shown below are attached to the machine. Fully understand the
descriptions on the hazard labels and observe them during troubleshooting.
descriptions on the hazard labels and observe them during troubleshooting.
Take extreme care not to remove or damage the hazard labels.
Take extreme care not to remove or damage the hazard labels.