User-Access To The Machine Maintenance Mode - Brother MFC990CW Service Manual

9.1.3 User-access to the Machine Maintenance Mode

Basically, the maintenance-mode functions listed on the previous page should be accessed by
service personnel only. However, you can allow end users to access some of these under the
guidance of service personnel (e.g., by telephone).
The user-accessible functions (codes 10 to 12, 33, 37, 39, 46, 52, 53, 66, 75, 76, 80, 82, 87, 88,
and 91) are shaded in the table given on the previous page. Function code 10 accesses the
firmware switches, each of which has eight selectors. You should not allow end users to access
all of those selectors, but you can allow them to access user-accessible selectors which are
shaded in the firmware switch tables in
The service personnel should instruct end users to follow the procedure given below.
(1) Models without touch panel
Press the Menu, Black Start (Mono Start), and Menu keys in this order.
TIP: For models with numerical keypad on the control panel, you may press the Menu,
Black Start (Mono Start), and 0 keys instead in the same way as conventional models.
Models with touch panel
Press the Menu key on the touch panel (or the Scan and Copy keys on the control panel
simultaneously) and the Black Start (Mono Start) key in this order. Next, press the Scan
and Copy keys simultaneously (or press the Photo Capture key).
TIP: For models with numerical keypad on the control panel, you may press the Menu key
on the touch panel (or the Scan and Copy keys on the control panel simultaneously), the
Black Start (Mono Start) key, and the 0 key on the numerical keypad instead in the same
way as conventional models.
(2) When the machine shows "
machine is ready to accept a function code number, enter a desired user-accessible code.
(3) To make the machine return to standby, press the Stop/Exit key. When each of the user-
accessible functions is completed, the machine automatically returns to standby.
Appendix 4.
" on the LCD, indicating that the
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