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
Содержание DCP-J925DW
Страница 17: ...xiv Confidential ...
Страница 18: ...xv Confidential ...
Страница 19: ...xvi Confidential ...
Страница 20: ...xvii Confidential ...
Страница 21: ...xviii Confidential ...
Страница 44: ...1 23 Confidential 1 0 08 inches 2 mm or greater curve may cause jams to occur ...
Страница 140: ...3 3 Confidential 2 PACKING ...
Страница 152: ...3 15 Confidential 2 CIS flat cable Cable guides Flat core CIS flat cable Cable guide 3_009 Upper cover Lock arm ...
Страница 262: ...4 9 Confidential Head Inclination Test Pattern Upper single row of blocks Center two rows of blocks ...
Страница 281: ...4 28 Confidential ADF Copy Chart C A B D ...
Страница 292: ...5 8 Confidential Print Pattern for Creating Head Calibration Data ...
Страница 294: ...5 10 Confidential Scanning Compensation Data List ...
Страница 297: ...5 13 Confidential Nozzle Test Pattern ...
Страница 300: ...5 16 Confidential Configuration List ...
Страница 303: ...5 19 Confidential MFCJ430W J432W MFCJ625DW J825DW Key Entry Order ...
Страница 318: ...5 34 Confidential PF EXIT Adjust Check Pattern Paper feed roller ...
Страница 319: ...5 35 Confidential EXIT Adjust Check Pattern 1 ...
Страница 320: ...5 36 Confidential EXIT Adjust Check Pattern 2 ...
Страница 321: ...5 37 Confidential EXIT Adjust Check Pattern 3 ...
Страница 322: ...5 38 Confidential KEISEN2 LF300 EXIT ADJUST PATTERN ...
Страница 327: ...5 43 Confidential Vertical Alignment Check Pattern ...
Страница 331: ...5 47 Confidential Left Right Top and Bottom Margin Check Pattern ...
Страница 367: ...6 4 Confidential Power supply PCB 100 V series ...
Страница 368: ...6 5 Confidential Power supply PCB 200 V series ...
Страница 369: ...6 6 Confidential Wiring diagrams ...