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Samsung
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ML-1665
Service Manual
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Alignment and T
roubleshooting
Service Manual
4-34
Samsung Electronics
1
1) Ghost (4)
Description :
Ghost occurs at 47 mm intervals.
The temperature of the fuser
is maintained high.
Disassemble the fuser and
remove the contaminated toner
particles on the roller and clean
the foreign matter between
Thermistor and Heat roller
.
( Caution : can be deformed)
47mm
81
83
Table of Contents
Main Page
Default Chapter
1
Default Chapter
1
Laser Printer
1
Table of Contents
3
Chapter 1 Precautions
6
Safety Warning
6
Caution for Safety
7
Electric Shock and Fire Safety Precautions
7
Toxic Material
7
Assembly / Disassembly Precautions
8
Handling Precautions
8
Disregarding this Warning May Cause Bodily Injury
9
ESD Precautions
10
Chapter 2 Product Overview
11
Product Specifications
11
Product Overview
11
Specifications
12
Paper Handling
13
Model Comparison Table
17
System Overview
18
Front View
18
Rear View
19
System Layout
20
Driver Assy
22
Transfer Roller
22
Pressure Roller
23
Heat Roller
23
Toner Cartridge
26
Engine H/W Specifications
27
Main Board
30
Engine F/W Contol Algorithm
33
Lsu
34
S/W Descriptions
35
Block Diagram
36
Chapter 3 Maintenance and Disassembly
38
Precautions When Replacing Parts
38
Preautions When Handling PBA
38
Precautions When Assembling and Disassembling
38
Releasing Plastic Latches
38
Screws Used in the Printer
39
Cover
40
Left/Right Cover
40
Rear Bracket
40
Cover-Open
41
Top
41
Main PBA
42
SMPS/HVPS Board
43
Fuser Unit
44
Lsu
45
Top View
45
Drive Unit
46
Step Motor
47
Pick up Roller
48
Chapter 4 Alignment and Troubleshooting
49
Alignment and Adjustments
49
Control Panel
49
Understanding the Control Panel
50
JAM Removal
51
Printing a Report
53
Demo Page
54
Periodic Defective Image
56
Firmware Upgrade
57
Using the Smart Panel Program
58
Changing the Smart Panel Program Settings
59
Opening the Troubleshooting Guide
59
Troubleshooting
60
Procedure of Checking the Symptoms
60
Basic Check List
61
Initial Inspection
62
Bad Discharge
63
Malfunction
67
Bad Image
72
Error Messages
86
Chapter 5 System Diagram
108
Block Diagram
108
Connection Diagram
109
Chapter 6 Reference Information
110
Tool for Troubleshooting
110
Acronyms and Abbreviations
111
Acronyms
111
Service Parts
113
A4 ISO 19752 Standard Pattern
117
Selecting a Location
118
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