Samsung SCX-4521F Reference Information

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Reference Information
Samsung Electronics
Service Manual
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11. Reference Information
This chapter describes the reference information for applying this training manual, and it is consist-ed of the tool list, the abbreviation table, the outline of model, and so on.
11.1 Troubleshooting Tool
The following tools are recommended safe and easy troubleshooting as described in this service manual.
DVM(Digital Volt Meter)
Standard : Indicates more than 3 digits.
• Driver
Standard : "-" type, "+" type (M3 long, M3 short, M2
long, M2 short).
• T weezers
Standard : For general home use, small type.
• Cotton Swab
Standard : For general home use, for medical service.
• Cleaning Equipments
Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or
a gentle neutral detergent and lint-free cloth.
• Vacuum Cleaner
• Spring Hook
Standard : For general use
• Software (Driver) installation CD ROM
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11.2 Acronyms and Abbreviations(1)
The table below explains the abbreviations and acronyms used in this service manual. Where abbreviations or acronyms are used in the text please refer to this table.
Abbreviations Explanation
AP Access Point AC Alternating Current APC Auto Power Control ASIC Application Specific Integrated Circuit ASSY assembly BIOS Basic Input Output System BLDC Brush-less Direct Current CMOS Complementary Metal Oxide Semiconductor CN connector CON connector CPU Central Processing Unit dB decibel dbA decibel A dBM decibel milliwatt DC direct current DCU Diagnostic Control Unit DPI Dot Per Inch DRAM Dynamic Random Access Memory DVM Digital Voltmeter ECP Enhanced Capability Port EDC Embedded Diagnostic control EEPROM Electronically Erasable Programmable Read Only Memory EMI Electro Magnetic Interference EP electrophotographic EPP Enhanced Parallel Port FPOT First Printout Time F/W firmware GDI graphics device interface GND ground HBP Host Based Printing HDD Hard Disk Drive H/H High temperature and high marshy place HV high voltage HVPS High Voltage Power Supply I/F interface I/O Input and Output IC integrated circuit IDE Intelligent Drive electronics or Imbedded Drive Electronics
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Acronyms and Abbreviations(2)
Abbreviations Explanation
IEEE Institute of Electrical and Electronics Engineers. Inc IP A Isopropy Alcohol IPM Images Per Minute LAN local area network lb pound(s) LBP Laser Beam Printer LCD Liquid Crystal Display LED Light Emitting Diode L/L Low temperature and low marshy place LSU Laser Scanning Unit MB megabyte MHz megahertz MPF Multi Purpose Feeder NIC Network Interface Card N/N Normal temperature and normal marshy place NVRAM nonvolatile random access memory OPC Organic Photo Conductor OPE Operate Panel Equipment PBA Printed Board Assembly PCL Printer Command Language , Printer Control Language PDL Page Discription Language PPM Page Per Minute PPS Pulse Per Second PS Post Script PTL Pre-Transfer Lamp PWM Pulse Width Modulation Q-PID Quick Printer Initiating Device Q ty quantity RAM Random Access Memory ROM Read Only Memory SCF Second Cassette Feeder SMPS Switching Mode Power Supply SPGP Samsung Printer Graphic Processor SPL Samsung Printer Language Spool Simultaneous Peripheral Operation Online SW switch sync synchronous or synchronization USB Universal Serial Bus WECA Wireless Ethernet Compatibility Alliance
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11.3 Selecting printer locations
• Leave enough room to open the printer trays, covers, and allow for proper ventilation. (see diagram below)
• Provide the proper environment :
- Afirm, level surface
- Away from the direct airflow of air conditioners, heaters, or ventilators
- Free of extreme fluctuations of temperature, sunlight, or humidity
- Clean, dry, and free of dust
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11.4 Sample Tests Patterns
The sample patterns shown below are the standard test patterns used in the factory. The life of the toner cartridge, developer cartridge and printing speed are measured with the pattern shown below (5%). The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4 size.
A4 ISO 19752 Standard Patterns
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