Samsung ML-2251N Service Manual
  1. Manuals
  2. Brands
  3. Samsung Manuals
  4. Printer
  5. ML-2251N
  6. Service manual
Samsung ML-2251N Service Manual

Samsung ML-2251N Service Manual

Hide thumbs Also See for ML-2251N:
Table of Contents

Advertisement

Quick Links

See also: User Manual , Manual
4
4

4. Summary of Product

This chapter describes the functions and operating principals of the main components.

4.1 Printer Components

4.1.1 Front View
Output Support
Front Cover
Multi Purpose Feeder
Samsung Electronics
Top output tray
(Face down)
Control Panel
Paper level indicator
Tray
Summary of product
Power switch
Service Manual
4-1

Advertisement

Table of Contents
loading

Related Manuals for Samsung ML-2251N

Summary of Contents for Samsung ML-2251N

  • Page 1: Summary Of Product

    This chapter describes the functions and operating principals of the main components. 4.1 Printer Components 4.1.1 Front View Top output tray (Face down) Control Panel Output Support Front Cover Power switch Multi Purpose Feeder Paper level indicator Tray Service Manual Samsung Electronics...

  • Page 2: Rear View

    Summary of Product 4.1.2 Rear View Rear output tray (Face up) Power receptacle USB port Parallel port Service Manual Samsung Electronics...

  • Page 3: Control Panel

    If you press this button once again this LED is off and the Toner Save mode is disabled. If the On Line/Error and Toner Save LEDs blink at the same time your system has experi- enced an internal problems. Refer to Section 6.6 Service Manual Samsung Electronics...
  • Page 4 In Manual Feed mode it is not possible to cancel the print job by pressing this button. Toner Save mode on/off In Ready mode, press this button to turn the Toner Save mode on or off. Service Manual Samsung Electronics...

  • Page 5: System Construction

    (2) Memory parts (Flash Rom containing the control program and DRAM for working memory) (3) Engine interface parts (motor control, fuser control, HVPS control, sensors etc) (4) PC Interface (USB , Parallel, Network – wired and wireless) (5) Bus, DMA and I/O handling ii) Operators panel iii) PC Interface Service Manual Samsung Electronics...

  • Page 6: System Layout

    Summary of Product 4.2.2 System Layout L S U Fuser Toner Cartridge EXIT Sensor MP Sensor MP Sensor Cassette Fuser Manual Feeder LSU(Laser Scan Unit) Transfer Roller Toner Cartridge Service Manual Samsung Electronics...

  • Page 7: Paper Feed

    4.2.5 Driver Ass'y Power is provided to the paper drive assembly under the control of the main PWA. The main motor powers the paper feed, toner cartridge, fuser unit and all pick-up, feed and exit rollers. Service Manual Samsung Electronics...

  • Page 8: Thermistor And Thermostat

    There are two methods of fusing toner onto the paper: the existing heat lamp process and the Q-PID process developed by Samsung. ML2250 export models, both 110V and 220V, use the heat lamp process. This consists of a heat lamp, heat roller, pressure roller, thermistor and thermostat. By use of heat and pressure toner is caused to melt and adhere to the paper surface in order to complete the printing process.

  • Page 9: Toner Cartridge

    - Management of waste toner: Collected using an electro-static process and retained within the toner cartridge --> no waste toner to dispose of. - OPC Drum protecting Shutter: No. - Classifying device for toner cartridge: ID is classified by interruption of the frame channel. Service Manual Samsung Electronics...
  • Page 10 PARALLEL PORT SINGLE TERMINATION NETWORK(ST1284) U23 LOW VOLTAGE IEEE 161284 TRANSLATING TRANSCEIVER(161284) U22 VIDEO X-TAL(19.6MHz) OSC3 USB 2.0(NET2270) U25 USB X-TAL(30MHz) OSC4 LOW VOLTAGE OCTAL D-TYPE FLIP-FLOP(74LVX273) U14, U19 LOW VOLTAGE BIDIRECTIONAL TRANSCEIVER(74LCX245) U10 FLASH MEMOTY(29LV160DB) U13 Service Manual 4-10 Samsung Electronics...

  • Page 11: Flash Memory

    It stores the system program, this can be updated by downloading the system program through the PC Interface. In export models PCL fonts are also sred in the flash memory. • Capacity :2M Byte • Access Time :70 nsec Service Manual 4-11 Samsung Electronics...

  • Page 12: Sensor Input Circuit

    The main motor drives the paper feed, developing unit, Fuser and Exit ass'y. It is driven by software which controls the acceleration, constant speed and deceleration profiles. The Motor is driven using an A3977 driver IC. Service Manual 4-12 Samsung Electronics...
  • Page 13 If the two conditions are not satisfied, the error shown in the table below occurs. Error Type Description DCU Display Value Polygon Motor Error When the polygon motor speed doesn't become steady Hsync Error The polygon motor speed is steady but the Hsync is not generated Service Manual 4-13 Samsung Electronics...
  • Page 14 The HVPS part uses the 24V and outputs the high voltage for THV/MHV/BIAS and the outputted high voltage is supplied to the toner, OPC cartridge and transfer roller. Service Manual 4-14 Samsung Electronics...

  • Page 15: Hvps (High Voltage Power Supply)

    - Output Voltage Rise Time : 50 ms Max - Output Voltage Fall Time : 50 ms Max - Output Loading range : 10 MΩ ~ 1000 MΩ - Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low. Service Manual 4-15 Samsung Electronics...

  • Page 16: Smps(Switching Mode Power Supply)

    3) Consumption Power Item System (+3.3V) (+5V) (24V) Stand-By 1.0 A 0.07A 0.4 A AVG : 55 Wh PRINTING 1.0 A 0.14A 2.0 A AVG : 280 Wh Service Manual Training Manual 4-16 4-16 Samsung Electronics Samsung Electronics...
  • Page 17 *The paper exists between the feed sensor and the exit sensor. JAM 2 -After the trailing edge of the paper passes the feed sensor the trailing edge of the paper does not pass the exit sensor within a certain time. Service Manual 4-17 Samsung Electronics...
  • Page 18 Summary of Product MEMO Service Manual 4-18 Samsung Electronics...

Table of Contents