SERVICEMANUALPublished in April 2015

842N41172N4SM067

Rev. 7

TASKalfa 3051ciTASKalfa 3551ciTASKalfa 4551ciTASKalfa 5551ci

2L6/2N6/2N5/2N4-4

1-1-2

Light source LEDScanning system Flat bed scanning by CCD image sensorPhotoconductor a-Si (drum diameter 30 mm)

Image write system Semiconductor laserCharging system Charger roller

Developing systemTouch down developing systemDeveloper: 2-componentToner replenishing: Automatic from the toner container

Transfer system Primary: Transfer beltSecondary: Transfer roller

Separation system Small diameter separation, Separation electrodeCleaning system Drum: Counter blade, Cleaning roller

Transfer belt: Fur brushCharge erasing system Exposure by cleaning lamp (LED)

Fusing systemBelt fusingHeat source: IHAbnormally high temperature protection devices: thermostat

CPU Dual Core (Freescale QorIQ P1022) 800MHz

Dual Core (Freescale QorIQ P1022) 1067MHz

Memory 3.5GB (When the Document Processor (dual scan DP) is installed, 4GB.)Hard Disk 160 GB (standard) 320 GB or more(HDD x 2) (standard)

Interface

StandardUSB Interface Connector: 1 (USB Hi-Speed)Network interface: 1 (10 BASE-T/100 BASE-TX/1000 BASE-T)USBPort: 4 (Hi-Speed USB)

OptionFax: 2Network interface: 1 (10 BASE-T/100 BASE-TX/1000 BASE-T)A maximum of two interface options can be installed.Only one network interface can be installed.When a network interface is installed, only one fax line can be installed.

Resolution 600 × 600 dpi

Operatingenvironment

Temperature 10 to 32.5 °C/ 50 to 90.5 °FHumidity 15 to 80% RHAltitude 2,500 m/ 8,202 ft or less

Brightness 1,500 lux or less

Dimensions(W × D × H)

machine only

25 1/2 × 30 3/16 × 29 13/32648 × 767 × 747 mm

with paper feeder

25 1/2 × 30 3/16 × 48 5/8�648 × 767 × 1,235 mm

Space required (W × D)(using MP tray)

36 13/32 × 30 3/16� 925 × 767 mm

Weight 114.4 kg / 252.2 lb (without toner container)

Item Specifications30 ppm 35 ppm 45 ppm 55 ppm

2L6/2N6/2N5/2N4

2-3-1

2-3 Operation of the PWBs2-3-1 Main PWB

Figure 2-3-1 Main PWB silk-screen diagram