Head/Carriage Unit Traveling Speed Check (Function Code 69) - Brother MFC640CW Service Manual

8.4.17 Head/Carriage Unit Traveling Speed Check (Function code 69)

Function
This function checks whether or not the traveling speed of the head/carriage unit is within the
specified range.
This procedure should be performed when you replace the head/carriage unit, carriage motor, or CR
encoder strip or when you loosen the timing belt.
Operating Procedure
(1) MFC820CW/640CW
Press the 6 and 9 keys in this order in the initial stage of the maintenance mode.
DCP340CW
Enter 6 and 9 in the initial stage of the maintenance mode by using
(*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 machine starts aging the head/carriage unit, showing the "CR AGING" on the LCD.
In each of travel speeds 40, 33.3, 32.0 and 20, the machine checks whether the maximum and
minimum speeds are within the specified range.
If both are within the range, the machine automatically returns to the initial stage of the
maintenance mode.
If either one is out of the range, the machine beeps and shows some message, e.g., "40O 33X
32X 20O" on the LCD. This sample message indicates that the speed variation is within the
allowable range when the head/carriage unit travels at 40 or 20 inches/sec.; however, it is out of
the range at 33 or 32 inches/sec.
To return to the initial stage of the maintenance mode, press the Stop/Exit key.
8 - 4 0
and Set keys.*
key several times to
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