Brother International HL-3400CN Service Manual - Page 18

HL-3400CN SERVICE MANUAL 4. DESCRIPTION OF CONTROL PANEL The printer control panel provides control of the printer including test printing, maintenance operations performed by the video controller and also the ones which are performed by the engine controller. The Video Controller Mode and the Engine Controller Mode have some common functions. Under normal circumstances the functions in the Video controller mode will be used. Refer to CHAPTER 5 for further information. 4.1 Video Controller Mode The printer goes into the Video Controller Mode when the power is turned on by pressing the power button. The Video Controller Mode supplies the general test printing and setting functions and some of the maintenance operations. If further engine settings are required, use the Engine Controller Mode. 4.2 Engine Controller Mode The printer goes into the Engine Controller Mode when power is turned on by pressing the power button at the same time as holding down the Mode, Set and Y buttons. (Refer to Fig.1-4.) NOTE: This mode provides unique control panel display and operation functions which are completely different from the ones described on the actual control panel labels or in the user's guide. Refer to CHAPTER 5 for detailed information. 1-9