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Kyocera Mita
Printer
FS-6750
Kyocera Mita FS-6750 User Manual
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SERVICE
MANUAL
2
Table of Contents
Conventions/Preface
7
Default Chapter
7
Table of Contents
7
Chapter 1 PRODUCT INFORMATION
8
Printer Identification Labeling
8
Printer Specifications
9
Expansion Memory (DIMM)
10
Memory Card (Compactflash)
11
Hard Disk (Microdrive)
12
Front and Internal Views
13
Internal Component
14
Safety Information
16
Laser Caution Label on the Scanner Unit
16
Ozone Concentration
16
Installation
17
Environmental Requirements
17
Clearance
17
Places to Avoid
18
Notes on Power
18
About the Toner
19
Toner Container Handling
19
Toner Storage
20
Chapter 2 I N S T a L L a T I O N
21
Unpacking
22
Installing Toner
23
Installing the Waste Toner Bottle
25
Developer Initialization
26
Expanding Memory
27
Minimum Memory Requirements
27
DIMM to be Used
27
Notes on Handling the Main Circuit Board and DIMM
28
Installing the DIMM
29
Testing the Expansion Memory
30
Installing the Option Hard Disk (Microdrive)
31
Installing the Option Memory Card (Compactflash)
32
Installing the Option Network Interface Card
33
Using the Operator Panel
34
Operator Panel
34
Indicators and Keys
34
Interface Indicator
36
Paper Size Indicator
36
Paper Type Indicator
37
Message Display
38
Menu Selection System
39
Menu Selection and Sequence
39
Chapter 3 M a I N T E N a N C E
43
Toner Container
45
When to Replace the Toner Container
45
Notes on Changing the Toner Container
45
Toner Container Replacement
46
Waste Toner Bottle
46
Toner Saver Mode (Ecoprint)
46
Cleaning the Printer
47
Main Charger Unit
47
Paper Feed Unit
49
Handling the Developer Unit
51
Removing the Developer Unit
51
Shipping the Developer Unit
51
Initializing the Developer
53
Updating the Firmware
54
Format for the Firmware Files
54
Downloading Firmware Via the Parallel Interface
55
Downloading Firmware Using the Memory Card
56
Downloading Message Data
57
Downloading Errors
58
Table of Contents
59
Chapter 4 OPERATION THEORY
60
Electrophotographics System
60
Electrophotographic System
60
OPC Drum
60
Charging the Drum
61
Toner
62
Exposure
62
Scanner Unit
63
Scanning Laser
65
Development
65
Developing Roller Bias
66
Toner Sensor
67
Transfer
67
Fusing
68
Drum Cleaning and Erasing Static Charge
69
Typical Photo Process Timing Chart
70
Print Timing Charts
71
Paper Feeding System
79
Cassette Feeding
80
Multi Purpose Tray Feeding
80
Paper Jam Sensing
81
Basic Engine Functions
82
Basic Sequence of Operation
82
Engine Controller System
83
Flash Memory
83
Print Density Control
83
High-Voltage Generator
83
Laser Scanner Control
83
Polygon Motor Control
83
Safety Interlock
84
The Engine Gate Array
85
Pin Assignment
85
Power Supply
89
Logic Controller System
90
Printing Data Processing
92
System ROM
92
Main RAM
92
Memory Card/Hard Disk(Microdrive) Slot Interface
93
Option Interface
93
Parallel Interface
94
Serial Interface
95
Engine Interface
95
Signals Used for the Engine Interface
96
Chapter 5 D I S a S S E M B L y
97
General Instructions
98
Screws/Hardware
98
Disassembly: Main Unit Printer
99
Removing the Developer Unit
99
Shipping the Developer Unit
100
Installing a New Developer
100
Removing the Paper Feed Unit
101
Removing the Transfer Roller
102
Cleaning the Transfer Roller
102
Rreplacing the Transfer Roller
102
Removing the Registration Rollers
103
Removing the Drum Unit
104
Replacing the Drum Unit
105
Main Charger Unit
105
Top Side Cover
106
Removing Covers
106
Removing Front Cover
108
Removing the Main Motor
109
Removing the Drive Assembly
109
Removing the Fuser Unit
110
Removing the Heater Lamp
110
Installing the Fuser Roller
111
Removing the Thermistor and Thermal Cutout
112
Replacing the Heat Roller
113
Removing the Controller Box
113
Removing the Face-Down Pulley Assembly
116
Disassembly: Option Paper Feeder
117
Removing the Feed Roller
117
Removing the Top Cover
118
Removing the Motor Assembly
118
Disassembly: Option Paper Feeder
121
Chapter 6 TROUBLESHOOTING
122
Board Layouts
122
Scanner Interface Board
123
Connect Board Connector
123
Fuser Board
124
Overall Wiring Diagram
125
General Error Handling
126
Maintenance Messages
126
Error Messages
128
Diagnostic
131
0420-Option Paper Feeder PF-26 Communication Error
132
0460-Option Duplexer DU-25 Communication Error
132
2000-Main Motor Error
133
4000-Laser Scanner Unit (Polygon Motor) Error
133
4200-Laser Scanner Unit (Pin Photo Diode Sensor) Error
133
5300-Eraser Disconnection Detection
134
6000-Fuser Unit Error
134
6020-Abnormal High Temperature Error
134
7001-Toner Motor Error
135
7350-Toner Refreshing Mode Error
135
F0/F000-Main Board Error
135
F010-System DIMM [Board] Error
136
F020-Main or Expanded Memory Error
136
F030-Main Board System Error
136
F040-Communication Error
136
F070-Flash ROM Write Error
136
F080-Engine Board Flash ROM Error
137
False Error-Feed Unit Cover Open
138
Print Quality Problems
142
Completely Blank Printout
142
All-Black Printout
142
Dropouts, Horizontal Streak, Black Dots
143
Black Vertical Streaks
143
Unsharp Printing
144
Grey Background
144
Dirt on the Top Edge or Back of the Paper
145
Incorrect Printing Registration
145
Checking Cassette Size Sensors
146
Drum Cleaning
147
Repetitive Defects Gauge
147
Troubleshooting Print Quality Problems
148
Appendix A PRINTER INTERFACE
150
Parallel Interface
150
Port Pin Assignment
150
Parallel Interface Connection
150
Serial Interface
152
Serial Interface Specifications
152
Data Error Information (Snn)
153
Changing the Serial Interface Configuration
153
Serial Port Pin Assignment
154
RS-232C Interface Voltage Levels
155
Connector Configurations
155
RS-232C Protocol
156
4
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Kyocera Mita FS-6750 Specifications
General
Print Technology
Laser
Duplex Printing
Optional
Interface
USB
PDL
PCL 6
Resolution
1200 x 1200 dpi
Memory
16 MB
Supported OS
Windows, Mac OS, Linux
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