Brother International HL-2600CN Service Manual - Page 127

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. Power on + button + - button + Power on Go button + + button + Power on Press the -, + and Set buttons in this order while holding down the Go button. Set button + Power on Table 5-1 Normal Mode Line Test Mode DRAM Test Mode Test Print Mode NVRAM Reset Mode V-2