Brother MFC640CW - Page 218

8-20 Confidential
If the sensing status are as listed below, the LCD will show "DFDRCVRS P1 " and
"IKIYICIMVTHK ," which can be switched by pressing the Black Start (Mono Start) key.
Given below is the relationship between the LCD indication, sensor name and sensor status.
LCD Sensors Sensing status
DF Document front sensor No document detected.
DR Document rear sensor No document detected.
CV Scanner open sensor Scanner unit closed.
RS Registration sensor No recording paper detected.
P1 Purge cam switch Purge cam switch ON.
IK Black ink cartridge sensor Black ink cartridge loaded (Black ink present).
IY Yellow ink cartridge sensor Yellow ink cartridge loaded (Yellow ink present).
IC Cyan ink cartridge sensor Cyan ink cartridge loaded (Cyan ink present).
IM Magenta ink cartridge sensor Magenta ink cartridge loaded (Magenta ink present).
VT Head driver chip temperature sensor Driver chip temperature within the allowable range.
HK Hook switch* On-hook state.
* MFC640CW
The HK is displayed even on those models not equipped with their related sensors.
(2) Change the detecting conditions (e.g., open the scanner unit or insert paper through the
registration sensor or remove the ink cartridges), and then check that the indication on the LCD
changes according to the sensor states.
(3) To stop this operation and return the machine to the initial stage of the maintenance mode,
press the Stop/Exit key.