1 Introduction 5
1.1. Specifications
5
1.2. Indicators
10
1.3. Parts Identification
12
1.4. Component Layout and Paper Path
13
1.5. Electrical Components and Sensor Boards
14
1.6. Switches and Solenoids
15
1.7. Print Process
16
1.8. Paper Feed
18
1.9. Laser Scan Unit ( Exposure )
19
1.10. Fuser Unit
21
1.11. Paper Ejection and Paper Switchback
22
2 Installation, Setup, and Repacking
23
2.1. Installation Requirements
23
2.2. Setup
23
2.3. Repacking
26
3 Removal and Replacement Procedures
29
3.1. Front and Rear Covers
29
3.2. Right, Left and Top Covers
31
3.3. Laser Scanning Unit ( LSU )
32
3.4. Relay Board (B)
32
3.5. High Voltage Board and Power Supply Unit
33
3.6. Indicator Board
35
3.7. Engine Control Board and Toner Empty Sensor Board
35
3.8. 2nd Feeder I / F Board and Main Control Board
37
3.9. Fuser Drive Gear
38
3.10. Fan Motor
38
3.11. Gear Support Bracket, Relay Board ( A ), Motor, Drive
Gear Unit and Paper Empty Sensor Board
39
3.12. Upper Exit Roller Holder
41
3.13. Fuser Unit
42
3.14. Pickup, Paper Feed, Registration and Transfer Rollers
46
3.15. Transfer Roller Assembly
48
3.16. Auto Duplex Unit, ADU Registration Roller and ADU Pinch
Roller
49
3.17. Registration Sensor Lever, Paper Top Detection Sensor
Lever and Registration & Paper Top Detection Sensor
Board
51
3.18. Paper Empty Sensor Lever
53
4 Electronic Circuit Description and Diagrams
54
4.1. Block Diagram
54
4.2. Connection Diagram
56
4.3. Power Supply
57
4.4. Engine Control Board
58
4.5. Main Control Board
74
5 Schematic Diagram
87
5.1. Main Control Board
89
5.2. Engine Control Board
99
5.3. Sensors, Indicator and Relay Boards
103
5.4. Paper Empty Sensor Board and 2nd Feeder I / F Board
105
6 Explanation of Connectors
107
6.1. Main Control Board
107
6.2. Engine Control Board
112
6.3. Registration & Paper Top Sensor Board
117
6.4. Paper Exit / ADU Paper Jam Sensor Board
117
6.5. Indicator Board
117
6.6. Relay Board ( B )
118
6.7. Paper Empty Sensor Board
118
6.8. Toner Empty Sensor Board
118
6.9. 2nd Feeder I / F Board
119
7 Component Reference Guide
120
7.1. Main Control Board
120
7.2. Engine Control Board
127
8 Preventative Maintenance
131
8.1. General
131
8.2. Recommended Tools
131
8.3. Recommended Cleaning
131
8.4. Maintenance Tables
132
9 Troubleshooting
134
9.1. Self-Diagnostic Indicators
134
9.2. Initial Troubleshooting Flowchart
137
9.3. No Operation
138
9.4. Print Quality
139
9.5. Paper Jam
149
9.6. Call Service
155
10 Replacement Parts List with Lubrication Guide
167
10.1. Exterior
167
10.2. Right Side Parts
169
10.3. Left Side Parts ( Power Supply Unit and High Voltage
Board )
174
10.4. Rear and Top Side Parts
175
10.5. Bottom Side Parts
178
10.6. Mechanical Base
180
10.7. Media Tray ( Paper Cassette )
181
10.8. Packing
182
10.9. Main Control Board
183
10.10. Engine Control Board
188
10.11. Registration & Paper Top Detection Sensor Board
192
10.12. Paper Exit / ADU Paper Jam Sensor Board
192
10.13. Indicator Board
192
10.14. Toner Empty Sensor Board
193
10.15. Relay Board (A)
193
10.16. Relay Board (B)
193
10.17. Paper Empty Sensor Board
194
10.18. 2nd Feeder I / F Board
194
11 Schematic Diagram for printing with A4 size
195
11.1. Main Control Board
195
11.2. Engine Control Board
214
11.3. Sensors, Indicator and Relay Boards
221
11.4. Paper Empty Sensor Board and 2nd Feeder I / F Board
224
CONTENTS
Page Page
3
KX-P7105 / KX-P7110
