Brother HL-1850 Service Manual page 5

5. CONTROL PANEL OPERATION...........................................................................2-19
5.1 Data LED Indications ..................................................................................................... 2-19
5.2 Panel Switches Functions .............................................................................................. 2-20
5.2.1 Go switch .......................................................................................................................... 2-20
5.2.2 Job Cancel switch............................................................................................................. 2-20
5.2.3 Reprint switch ................................................................................................................... 2-21
5.2.4 + & - switch ....................................................................................................................... 2-24
5.2.5 Set switch ......................................................................................................................... 2-24
5.2.6 Back switch....................................................................................................................... 2-24
5.3 LCD Display ................................................................................................................... 2-24
5.3.1 Backlights ......................................................................................................................... 2-25
5.3.2 Printer status messages ................................................................................................... 2-26
5.4 How to Use the Control Panel........................................................................................ 2-27
5.5 Control Panel Setting Menu ........................................................................................... 2-28
5.5.1 Information ........................................................................................................................ 2-29
5.5.2 Paper ................................................................................................................................ 2-29
5.5.3 Quality............................................................................................................................... 2-30
5.5.4 Setup ................................................................................................................................ 2-30
5.5.5 Print menu......................................................................................................................... 2-31
5.5.6 Network............................................................................................................................. 2-34
5.5.7 Interface............................................................................................................................ 2-34
5.5.8 Reset menu....................................................................................................................... 2-35
5.5.9 Set IP address .................................................................................................................. 2-35
5.5.10 About emulation modes .................................................................................................... 2-36
5.5.11 List of factory settings ....................................................................................................... 2-36
5.6 Other Control Features .................................................................................................. 2-40
5.6.1 Sleep mode....................................................................................................................... 2-40
5.6.2 Inspection mode ............................................................................................................... 2-40
6. NETWORK BOARD OPERATION.........................................................................2-41
6.1 Installing the Network Board .......................................................................................... 2-41
6.2 Functions........................................................................................................................ 2-43
6.2.1 LED functions ................................................................................................................... 2-43
6.2.2 Factory default setting ...................................................................................................... 2-43
CHAPTER 3 THEORY OF OPERATION ................................................ 3-1
1. ELECTRONICS .......................................................................................................3-1
1.1 General Block Diagram .................................................................................................... 3-1
1.2 Main PCB Block Diagram................................................................................................. 3-2
1.3 Main PCB ......................................................................................................................... 3-3
1.3.1 ASIC.................................................................................................................................... 3-3
1.3.2 ROM.................................................................................................................................... 3-5
1.3.3 Flash ROM.......................................................................................................................... 3-6
1.3.4 SDRAM ............................................................................................................................... 3-7
1.3.5 Optional RAM...................................................................................................................... 3-9
1.3.6 PCI bus ............................................................................................................................. 3-10
1.3.7 EEPROM .......................................................................................................................... 3-11
1.3.8 Reset circuit ...................................................................................................................... 3-11
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HL-1850/1870N SERVICE MANUAL