Samsung M2070F - LSU (Laser Scanner Unit)

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2.Productspecicationanddescription

2.2.4.5.LSU(LaserScannerUnit)

ItisthecorepartoftheLBP(LaserBeamPrinter)whichswitchesfromthevideodatareceivedtothecontrollertothe

electrostaticlatentimageontheOPCdrumbycontrollinglaserbeam,exposingOPCdrum,andturningprincipleofpolygon

mirror.TheOPCdrumisturnedwiththepaperfeedingspeed.TheHSYNCsignaliscreatedwhenthelaserbeamfromLSU

reachestheendofthepolygonmirror,andthesignalissenttothecontroller.ThecontrollerdetectstheHSYNCsignalto

adjusttheverticallineoftheimageonpaper.Inotherwords,aftertheHSYNCsignalisdetected,theimagedataissentto

theLSUtoadjusttheleftmarginonpaper.Theonesideofthepolygonmirrorisonelineforscanning.

Main Page

Table of Contents2
Precautions5
Safety Warning5
Caution for Safety6
Toxic Material6
Electric Shock and Fire Safety Precautions6
Handling Precautions8
Assembly and Disassembly Precautions8
Disregarding this Warning May Cause Bodily Injury9
ESD Precautions10
Product Specification and Description11
Product Specification11
Product Overview11
Specifications11
General Print Engine11
Copier12
Scan Specification13
Fax14
Controller and Software15
Paper Handling17
Consumables18
Maintenance Part18
Reliability and Service18
Environment19
Accessories20
Model Comparison Table21
System Overview22
Front View22
Rear View24
Paper Path26
System Layout27
Feeding Part28
Transfer Roller29
Drive Unit29
Fuser Unit30
LSU (Laser Scanner Unit)32
Toner Cartridge33
Hardware Configuration34
Main Board35
OPE Board36
Fax Board38
Wireless LAN Board (Wireless Model Only)38
SMPS/HVPS Board39
Electrical Parts Location41
NFC Tag Sticker43
Engine F/W Contol Algorithm44
Feeding44
Transfer44
Fusing45
Lsu45
Software Descriptions46
Software System Overview46
Architecture46
Data and Control Flow47
Disassembly and Reassembly49
Precautions When Replacing Parts49
Precautions When Assembling and Disassembling49
Preautions When Handling PBA49
Releasing Plastic Latches50
Screws Used in the Printer51
Replacing the Main SVC Parts52
Right and Left Cover52
Scanner Unit53
ADF Unit54
OPE Unit55
CIS Unit and Scan Drive Unit56
Front Cover57
Middle Cover58
Rear Cover59
Main Board59
WLAN Board60
Fax Board60
SMPS/HVPS Board61
Fuser Unit62
Drive Unit62
Lsu63
Feed Sensor PBA64
Pick up Roller64
Motor65
Transfer Roller66
Alignment and Troubleshooting67
Alignment and Adjustments67
Control Panel67
Understanding the Status LED70
JAM Removal71
Clearing Original Document Jams71
Clearing Paper Jams73
Useful Menu Item for Service76
Periodic Defective Image77
Useful Management Tools78
Using Samsung Easy Printer Manager (Windows and Macintosh Only)78
Using Samsung Printer Status (Windows Only)80
Using Syncthru Web Service (SWS)81
Updating Firmware83
Update the Firmware by Using the USB Port83
Update the Firmware by Using the Network84
Tech Mode (SVC Mode)86
Troubleshooting90
Procedure of Checking the Symptoms90
Basic Check List91
Error Code and Troubleshooting92
Image Quality Problem103
Other Errors109
System Diagram110
Block Diagram110
Connection Diagram111
Reference Information112
Tool for Troubleshooting112
Glossary113
The Sample Pattern for the Test119
Selecting a Location120
Document Revision List121

Samsung M2070F - LSU (Laser Scanner Unit)

Table of Contents

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