Brother MFC-9420CN Panduan Servis - Halaman 3

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CHAPTER 8

MAINTENANCE MODE

Describes the maintenance mode which is exclusively designed for the purpose of checks, settings

and adjustments using the keys on the control panel.

In the maintenance mode, you can update memory (EEPROM: electrically erasable programmable

read-only memory) contents for optimizing the drive conditions of the head/carriage unit, paper

feed roller or paper ejection roller (if they have been replaced) or for setting the CIS scanner area,

for example. You can also customize the EEPROM according to the shipment destination of the

machine concerned. In addition, you can perform operational checks of the LCD, control panel

PCB or sensors, perform a print test, display the log information or error codes, and modify

firmware switches (WSW).

CHAPTER 9

ERROR INDICATION AND TROUBLESHOOTING

Details error messages and codes that the incorporated self-diagnostic functions display if any

error or malfunction occurs. If any error message appears, refer to this chapter to find which

components should be checked or replaced.

The latter half of this chapter provides sample problems that could occur in the main sections of

the machine and related troubleshooting procedures. This will help service personnel pinpoint and

repair defective components.

APPENDIX 1 SERIAL NUMBERING SYSTEM

Shows the location of serial number labels put on some parts and lists the coding information

pertaining to the serial numbers.

APPENDIX 2 FIRMWARE INSTALLATION

Provides instructions on how to update firmware stored in the flash ROM on the main PCB or load

firmware to a new main PCB from the host PC.

No hardware replacement is required for updating.

APPENDIX 3 CUSTOMIZING CODES ACCORDING TO SHIPPING DESTINATION

Lists the customizing codes for the various preferences exclusively designed for each destination

(e.g. language). Those codes are stored in the memory (EEPROM) mounted on the main PCB. If

the main PCB is replaced with a new one, therefore, you will need to set the proper customizing

codes with the machine in the maintenance mode.

APPENDIX 4 FIRMWARE SWITCHES (WSW)

Describes the functions of the firmware switches, which can be divided into two groups: one is for

customizing preferences designed for the shipping destination (as described in

the other is for modifying preferences that match the machine to the environmental conditions.

Use the latter group if the machine malfunctions due to mismatching.

APPENDIX 5 WIRING DIAGRAM

Provides the wiring diagram that helps you understand the connections between PCBs.

APPENDIX 6 CIRCUIT DIAGRAMS

Provides the circuit diagrams of the NCU PCB and power supply PCB.

APPENDIX 7 VIEWING THE EVENT LOG FILE

When installing the printer driver, the installer logs events that occur during the installation

process in the event log file. This appendix views a sample of the event log file. Selecting Start |

Program | Brother | MFL-Pro Suite model name | Installation Diagnostics reads out the event log

file.

This manual describes the models and their versions destined for major countries.

The specifications and functions are subject to change depending upon each destination.

Appendix

3) and

Confidential