Brother HL-3450CN Series, Service Manual

Page: 129 / 365

CHAPTER 5 CONTROL PANEL OPERATION
5-4
2. VIDEO CONTROLLER MODE
This section describes the operation and maintenance functions in the Video Controller
Mode.
2.1 Configuration of Operational Mode
This printer has various functions as set out in Table 5-1 for users to easily perform general
test printing, general settings and some maintenance work.
(1) Normal Mode: After turning on the printer, the printer goes into Normal Mode.
This mode provides normal printing for the end user. The following
section describes the toner save mode and the power save mode.
For other modes, refer to the user’s guide.
(2) Line Test Mode: This mode provides a self-test for each function in the Video
Controller Mode mainly for use when replacing the main (video
controller) PCB.
Whenever the video controller is replaced, these checks should be
carried out.
This mode provides performance tests for the engine LCD, control
panel buttons and various sensors.
(3) DRAM Test Mode: This mode is provided to test installed DIMM(s) on the main (video
controller) PCB.
(4) Test Print Mode: This mode allows you to print the selected test pattern in order to
check the engine.
(5) NVRAM Reset Mode:
This mode forces the NVRAM values of the video controller to be
reset to the factory settings.
When replacing the main PCB, the NVRAM value is automatically
reset to the factory setting. However, this mode is effective when the
video controller does not work due to errors.
Table 5-1
Power on Normal Mode
+ - Power on Line Test Mode
Go + Power on DRAM Test Mode
Press the –, + and Set buttons in
this order while holding down the
Go button.
Test Print Mode
Set Power on NVRAM Reset Mode