Operational Check Of Control Panel Pcb (Function Code 13) - Brother MFC640CW Service Manual

8.4.6 Operational Check of Control Panel PCB (Function code 13)

Function
This function allows you to check the control panel PCB for normal operation.
Operating Procedure
(1) MFC820CW/640CW
Press the 1 and 3 keys in this order in the initial stage of the maintenance mode.
DCP340CW
Enter 1 and 3 in the initial stage of the maintenance mode by using the
(*To enter a numerical code on models having no numerical keypad, press the
display the numerical code to be entered and then press the Set key. Repeat this operation for each
numerical code.)
The "00
(2) Press the keys in the order designated in the illustration shown below.
The LCD shows the corresponding number in decimal notation each time a key is pressed.
Check that the displayed number is correct by referring to the illustration below.
If a key 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 entry for operational check, press the
Stop/Exit key.
(3) After the last number key is pressed, the machine beeps and returns to the initial stage of the
maintenance mode.
To terminate this operation, press the Stop/Exit key. The machine returns to the initial stage of
the maintenance mode.
MFC820CW
MFC640CW
1
2
" will appear on the LCD.
2 3
1
13
4
5 6
14
7
8
9
15
10
11
12
16
8 9 10
4
11 12 13
5
14 15 16
6
17 18 19
3 7
20 23
21 22
Key Entry Order (1)
8 - 1 7
and Set keys.*
key several times to
23
17
22
21
18
24
19
20
27
25 26
26
24 25
27
29
30
28
29
28
30
31
32
31
33
34
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