Brother MFC990CW Service Manual page 350

This chapter describes the maintenance mode which is exclusively designed for the purpose of checks,
settings and adjustments of the machine using the keys on the control panel*.
* In operations for the maintenance mode in models with touch panel, keys of the software keypad
displayed on the touch panel are also used. Only when a key needs to be limited to the one on the control
panel or on the touch panel, this chapter describes a key, for example, as "the Copy key on the control
panel" or "the Scan key on the touch panel." If a description says just "the 5 key," you can use either the 5
key of the numerical keypad on the control panel or the 5 key of the software keypad on the touch 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 or the paper
feed roller and paper ejection roller in the engine unit, if those units 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).
For models with a cordless handset, the maintenance functions dedicated to cordless handsets are
provided.
NOTE: This chapter includes descriptions of facsimile functions which a DCP does not support.
9.1 MAINTENANCE MODE FOR THE MACHINE ....................................................... 9-1
9.1.1 Entry into the Machine Maintenance Mode ............................................... 9-1
9.1.2 List of Machine Maintenance-mode Functions.......................................... 9-3
9.1.3 User-access to the Machine Maintenance Mode ...................................... 9-4
9.1.4 Detailed Description of Functions in the Machine Maintenance Mode...... 9-5
9.1.4.1 EEPROM Parameter Initialization (Function code 01, 91) .................... 9-5
9.1.4.2 Printout of Scanning Compensation Data (Function code 05) .............. 9-6
9.1.4.3 ADF Performance Test (Function code 08) ........................................... 9-8
9.1.4.4 Test Pattern (Function code 09) ............................................................ 9-9
9.1.4.5 Firmware Switch Setting and Printout
9.1.4.6 Operational Check of LCD and Specifying of the LCD Type
9.1.4.7 Operational Check of Control Panel PCB (Function code 13) .............. 9-18
9.1.4.8 Updating of Firmware Using an External Memory (Function code 28).. 9-20
9.1.4.9 Sensor Operational Check (Function code 32) ..................................... 9-21
9.1.4.10 Addition of Cordless Handsets (Function code 33) (User-accessible) .. 9-23
9.1.4.11 Printout of Dial Log (Function code 37) (User-accessible).................... 9-25
9.1.4.12 Cordless Handset Transmitter Volume (Function code 39)
CHAPTER 9 MAINTENANCE MODE
CONTENTS
(Function codes 10 and 11) (User-accessible)...................................... 9-11
(Function code 12) (User-accessible) ................................................... 9-16
(User-accessible) .................................................................................. 9-25
Confidential