2-1
Confidential
CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING
1
INTRODUCTION
This section gives the service personnel some of the troubleshooting procedures to be followed
if an error or malfunction occurs with the machine. It is impossible to anticipate all of the
possible problems which may occur in future and determine the troubleshooting procedures, so
this section covers some sample problems. However, those samples will help service personnel
pinpoint and repair other defective elements if he/she analyzes and examines them well.
1.1
Precautions
Be sure to observe the following to prevent any secondary troubles from happening during
troubleshooting.
(1) When disconnecting the connectors, do not pull the lead wires but hold the connector
housings.
(2) 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 static
mat. Also take care not to touch the conductor sections on the flat cables.
(3) Be sure to observe the warnings.
(4) After repairing the defective section, be sure to check again if the repaired section works
correctly.
DO NOT use flammable substances or organic solvent such as alcohol, benzine, thinner or
any type of spray to clean the inside or outside of the machine. Doing this may cause a fire or
electrical shock.
Always unplug the AC power cord from the outlet when removing the covers and PCBs,
adjusting the mechanisms, or conducting continuity testing with a circuit tester.
WARNING
WARNING
Summary of Contents for DCP-J925DW
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Page 44: ...1 23 Confidential 1 0 08 inches 2 mm or greater curve may cause jams to occur ...
Page 140: ...3 3 Confidential 2 PACKING ...
Page 281: ...4 28 Confidential ADF Copy Chart C A B D ...
Page 292: ...5 8 Confidential Print Pattern for Creating Head Calibration Data ...
Page 294: ...5 10 Confidential Scanning Compensation Data List ...
Page 297: ...5 13 Confidential Nozzle Test Pattern ...
Page 300: ...5 16 Confidential Configuration List ...
Page 303: ...5 19 Confidential MFCJ430W J432W MFCJ625DW J825DW Key Entry Order ...
Page 318: ...5 34 Confidential PF EXIT Adjust Check Pattern Paper feed roller ...
Page 319: ...5 35 Confidential EXIT Adjust Check Pattern 1 ...
Page 320: ...5 36 Confidential EXIT Adjust Check Pattern 2 ...
Page 321: ...5 37 Confidential EXIT Adjust Check Pattern 3 ...
Page 322: ...5 38 Confidential KEISEN2 LF300 EXIT ADJUST PATTERN ...
Page 327: ...5 43 Confidential Vertical Alignment Check Pattern ...
Page 331: ...5 47 Confidential Left Right Top and Bottom Margin Check Pattern ...
Page 367: ...6 4 Confidential Power supply PCB 100 V series ...
Page 368: ...6 5 Confidential Power supply PCB 200 V series ...
Page 369: ...6 6 Confidential Wiring diagrams ...