MFC-8420/8820D/8820DN, DCP-8020/8025D/8025DN
SERVICE MANUAL
7-13
3.8
Operational Check of Control Panel PCB (Maintenance mode 13)
< Function >
This function allows you to check the control panel PCB for normal operation.
< Operating Procedure >
(1) Press
the
1
and
3
keys in this order in the initial stage of the maintenance mode.
The "00 " will appear on the LCD.
(2) Press the keys and buttons in the order designated in the illustration shown below.
The LCD shows the corresponding number in decimal notation each time a key or
button is pressed. Check that the displayed number is correct by referring to the
illustration below.
If a key or button is pressed out of order, the machine beeps and displays the
"INVALID OPERATE" on the LCD. To return to the status ready to accept key &
button entry for operational check, press the
Stop
button.
(3) After the last number key or button is pressed, the machine beeps for one second and
returns to the initial stage of the maintenance mode.
To terminate this operation, press the
Stop
button. The machine returns to the initial
stage of the maintenance mode.
MFC8420/MFC8820D/MFC8820DN
17
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Fig.7-7
DCP8020/DCP8025D/8025DN
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Fig.7-8
Summary of Contents for DCP-8020
Page 264: ...CHAPTER 7 MAINTENANCE MODE 7 6 Fig 7 3 l m a b c d e f g h i j k ...
Page 335: ...APPENDIX 4 CIRCUIT DIAGRAMS A 50 Appendix 4 1 Main PCB Circuit Diagram 1 6 ...
Page 337: ...APPENDIX 4 CIRCUIT DIAGRAMS A 52 Appendix 4 3 Main PCB Circuit Diagram 3 6 ...
Page 339: ...APPENDIX 4 CIRCUIT DIAGRAMS A 54 Appendix 4 5 Main PCB Circuit Diagram 5 6 ...
Page 341: ...APPENDIX 4 CIRCUIT DIAGRAMS A 56 Appendix 4 7 Driver PCB Circuit Diagram ...
Page 343: ...APPENDIX 4 CIRCUIT DIAGRAMS A 58 Appendix 4 9 Engine PCB Circuit Diagram 2 2 ...
Page 345: ...APPENDIX 4 CIRCUIT DIAGRAMS A 60 Appendix 4 11 NCU PCB Circuit Diagram Europe ...
Page 347: ...APPENDIX 4 CIRCUIT DIAGRAMS A 62 Appendix 4 13 NCU PCB Circuit Diagram Oceania ...
