Table of Contents
Advertisement
Chapter 2
5) write/read operation to and from EEPROM
6) control of memory controller
c. Reset IC (IC6)
The reset IC serves to reset the CPU and ASIC at power-on with reference to the +3.3V voltage.
d. EEPROM(IC5)
The EEPROM is used to store various backup data.
2.8.2.3 Fan/Motor Control
LBP5000
The DC controller PCB serves to control 4 motors.
The following shows the specifications of the various motors used in the machine:
Name
Fixing/delivery motor
Motor
Pickup motor(M3)
2.8.2.4 Fan/Motor Control
LBP5100
The DC controller PCB serves to control 5 motors.
The duplexing driver PCB controls 2 motors.
The following shows the specifications of the various motors used in the machine:
- DC controller PCB
Name
Fixing/delivery motor
Motor
Pickup motor(M3)
Cartridges fan
- Duplexing driver PCB
Name
Reverse motor
Motor
Duplexing feed motor
2.8.2.5 Main Motor Fault Detection
LBP5000 / LBP5100
The CPU will identify any of the following conditions as the presence of a fault in the main motor, and will stop the printer engine and, at the same time, indicate
'E012' in the status window.
1) Main Motor Start-Up Fault (E012-0000)
The interval of the main motor speed detection signal (/MAINMFG) is not as specified 1000 msec after the start of the main motor drive.
2) Main Motor Rotation Fault (E012-0001)
The /MINMFG signal occurs at the specified intervals, but thereafter deviates continuously for 100 msec.
2.8.2.6 Fan Motor Fault Detection
LBP5000 / LBP5100
The CPU will identify any of the following conditions as the presence of a fault in the main motor, and will stop the printer engine and, at the same time, indicate
'E806' in the status window.
1) While the fan motor is rotating, the fan lock detection signal (FANLCK) is continuously High for about 10 sec or more.
2.8.3 Video Controller PCB
2.8.3.1 Outline
LBP5000 / LBP5100
The video controller receives print information from external devices (e.g., host computer) by way of interface cables. The information contains a CAPT command
used to communicate printer status and printer-specific characteristics and dot data, which is the result of conversion of print data by the host computer.
The data is sent to the DC controller circuit for control of laser diode activation.
If properly connected with a bi-directional interface, an external device may be used to check the printer status.
2-38
Main motor
Drives the ETB, photosensitive drum,
(M1)
and developing cylinder.
Drives the pressure roller, delivery
roller, and fixing assembly release
(M2)
mechanisms.
Drives the pickup roller and registration
roller
Fan
Cools the area around the cartridges.
(FM1)
Main motor
Drives the ETB, photosensitive drum,
(M1)
and developing cylinder.
Drives the pressure roller, delivery
roller, and fixing assembly release
(M2)
mechanisms.
Drives the pickup roller and registration
roller
Cools the area around the cartridges.
Fixing fan
Cools the area around the fixing unit.
(FM2)
To drive reverse roller
(M7)
To drive duplexing feed roller
(M6)
T-2-8
Function
Type
DC motor
Stepping motor
Stepping motor
DC motor
T-2-9
Function
Type
DC motor
Stepping motor
Stepping motor
DC motor
DC motor
T-2-10
Function
Type
Stepping motor
Stepping motor
Direction of
Fault detection
rotation
Clockwise
Yes
Clockwise/
No
counterclockwise
Clockwise
No
-
Yes
Direction of
Fault detection
rotation
Clockwise
Yes
Clockwise/
No
counterclockwise
Clockwise
No
-
Yes
-
Yes
Direction of
Fault detection
rotation
Clockwise/
No
counterclockwise
Clockwise
No
0010-6173
0015-7827
0010-6174
0010-6178
0010-8662
Advertisement
Table of Contents
