4.6
4.7
4.8
5.
5.1
5.1.1 LEDs ................................................................................................................................. 2-28
5.1.2 Control Panel Buttons ....................................................................................................... 2-28
5.2
5.3
Service call indications ...................................................................................................2-31
5.4
5.5
Other Control Features ...................................................................................................2-33
5.5.1 Sleep mode....................................................................................................................... 2-33
5.5.2 Print a test page................................................................................................................ 2-34
5.5.3 Print Settings..................................................................................................................... 2-34
6.
NETWORK FUNCTIONS ...................................................................................... 2-36
6.1
LED functions .................................................................................................................2-36
6.2
7.
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 CPU .................................................................................................................................... 3-3
1.3.2 USB..................................................................................................................................... 3-5
1.3.3 IEEE 1284........................................................................................................................... 3-6
1.3.4 Network Interface ................................................................................................................ 3-7
1.3.5 ROM.................................................................................................................................... 3-8
1.3.6 Flash ROM .......................................................................................................................... 3-9
1.3.7 SDRAM ............................................................................................................................. 3-10
1.3.8 Optional RAM.................................................................................................................... 3-11
1.3.9 EEPROM........................................................................................................................... 3-13
1.3.10 Reset Circuit ..................................................................................................................... 3-13
1.3.11 Engine I/O ......................................................................................................................... 3-14
1.3.12 Panel I/O ........................................................................................................................... 3-14
1.3.13 Video I/O ........................................................................................................................... 3-15
1.3.14 Power Supply .................................................................................................................... 3-16
1.4
Engine PCB ....................................................................................................................3-17
1.5
Power Supply..................................................................................................................3-18
2.
MECHANICS ......................................................................................................... 3-20
2.1
2.2
Paper Transfer................................................................................................................3-21
2.2.1 Paper supply ..................................................................................................................... 3-21
2.2.2 Paper registration.............................................................................................................. 3-21
HL-5030/5040/5050/5070N SERVICE MANUAL
iii