Samsung SCX 6220 Operation Instruction & Installation
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4. Summary of Product
This chapter describes the functions and operating principles of the main components.
4.1 Printer Components
4.1.1 Front View
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4.1.2 Rear View
* The network port is not fitted as standard on the machine.
** If your country has a different telephone connection system, this socket may be blocked.
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4.1.3 Control Panel (SCX-6320F & SCX-6220)
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4.2 System Layout
SCX6220/6320F can be divided into the following main constituent parts: Main Controller, Operator’s Panel,
PC Interface, Scanner, DADF, Line Interface and Power Supply. The Main Controller uses the SPGPm
processor. The Operator’s panel (OPE) and the DADF each have their own MICOM which communicates
serially with a UART built into the SPGPm processor. The Scanner uses the CIP4e processor to control the
CIS. The Line Interface is an FM336 integrated with the Main Board which communicates with the LIU at
speeds up to 33.6Kbps.
The Power Supply has both the SMPS and HVPS integrated on one PBA.
4.2.1 Feeding section
There is a universal cassette which automatically loads paper and the manual feed which supplies paper
single sheet at a time. The cassette has a friction pad which separates paper to ensure single sheet feeding, and it has a sensor, which checks when the paper tray is empty.
- Feeding Method: Universal Cassette Type
- Feeding Standard: Center Loading
- Feeding Capacity: Cassette-550 sheets (75g/m2 , 20lb paper standard)
- Multi-function tray: 100 sheet (75g/m2 , 20lb paper standard.)
- Paper detecting sensor: Photo sensor
- Paper size sensor: None
- Driven by gearing from the main motor
4.2.2 Transfer Ass’y
This consists of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL shines a light onto the OPC
drum This lowers the charge on the drum’s surface and improves transfer efficiency.
The transfer roller transfers toner from the OPC drum surface to the paper.
- Life span: 100,000 sheets (in 15~30°C)
4.2.3 Drive Ass’y
- Gear driven power unit. The motor supplies power to the paper feed unit, the fuser unit, and the
toner cartridge.
- Duplex motor drives output roller for forward and reverse functions.
- DADF Unit : the DADF has its own MICOM which controls the paper feed motors.
The two motors are, like the printer drive motors, used to feed the paper through the ADF
mechanism. The ADF duplex motor is used for reversing the paper feed for double sided
originals. Both DADF motors operate a a maximum of 2940pps.
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4.2.5 Scanner
It reads an image with a photosensitive sensor. It consists of a CCD module, Connection board, DADF
board , AFE (Analog Front End), and Image Processor (Located in CPU), platen glass and DADF.
4.2.5.1 General Specification
• The Scanner specification is as follows:
1) Minimum Scan Line Time : 0.68ms
2) Scan Resolution : Max. 600DPI
3) Scan Width : 216mm
4) Primary Function
- Internal 12bit ADC
- White Shading Correction
- Gamma Correction
- CCD Interface
- 256 Gray Scale
4.2.5.2 CCD Imager Control Specification
• CCD Image sensor uses +5V Power and Inverter uses +24Vpower.
- CCD Max. Driving Frequency : 10MHz
- CCD Line time : 0.68ms
- White Data Output Voltage : 0.7V°æ0.5V (Mono Copy, 0.68ms/line)
- Maximum Inverter Current : 600 mA Max.(Power +24V)
4.2.4 Fusing
The temperature change on the heat roller’s surface is measured using a Thermistor. The resistance of the
Thermistor changes as the temperature changes. The value of the resistance is measured using an A to D
converter and the value is sent to the processor. The processor controls the AC power to the heat coil. If
the processor decides that the temperature is out of range an error message is displayed on the KCD
display. Refer to the table below.
Heat Coil Method
Error Description
Open heat error When preheating, it has been lower than 68°C over 15 seconds.
Lower heat error • After finishing the preheating process, the fuser has not reached 100°C (preheating stop
temperature) within 15 seconds of the temperature reaching 68°C.
• Printing
1) When the main motor is on and after 0.92 second, it has not reached 160°C
within 20 seconds.
2) After the second consecutive page, the fuser has been 20°C lower than the fusing
temperature for more than 4 seconds.
Over heat error This error is not displayed immediately when the fuser reaches 220°C.
The temperature is checked after 3 seconds. If it is over 240°C, it is error.
If the temperature has been higher than 220°C for more than 25 seconds, it is an error
even though the temperature doesn't reach 240°C.
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