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User Manuals: Canon NP-70 Photocopier
Manuals and User Guides for Canon NP-70 Photocopier. We have
1
Canon NP-70 Photocopier manual available for free PDF download: Service Manual
Canon NP-70 Service Manual (243 pages)
Brand:
Canon
| Category:
Copier
| Size: 61.14 MB
Table of Contents
Table of Contents
6
Guide to the
16
1.1 Features of the Np-70 Copier
17
1.2 Appearance
18
Fig. 1-2 Control Panel
19
1.3 Specifications
20
Performance Specifications
20
Physical Specifications
20
Paper Specifications
21
Colors of Paper Available from Canon
21
Fig. 1-3 Original Positioning on Copyboard
21
1.4 Operating Procedures
22
Preparation
22
Placing of Original
22
Loading of Paper
22
Copying Operations
22
Image Density
23
Handling of Paper &Loading of Paper Cassette
23
Image Forming Process of the
24
Breakdown of the
26
2.2 Parts Nomenclature
26
2.3 Outline of Main Assemblies
26
Copyboard Assembly
26
Illumination Assembly
26
Optical Assembly
26
Drum Assembly
26
Corona Assemblies
26
Developer Assembly
26
Drum Cleaner Assembly
26
Fig. 2-1 Breakdown of the
28
Fig. 2-2 NP-70 Parts Nomenclature
30
Paper Pickup Roller Assembly
33
2.3-10 Copy Conveying Assembly
33
2.3-11 Heater Assembly
33
2.3-12 Blowers and Fans
33
2.3-13 Copy Selector Subassembly
33
2.3-14 Safety Assembly
33
Fig. 2-3 General Diagram of the Drive System
35
Fig. 2-4 Components of the Drive System
36
Fig. 2-6 Movement of the Original
38
Fig. 2-7 Movement of Copy Paper
39
Fig. 2-8 Conveying Drive Mechanism
40
Table 3-2 Explanation of ~START~ Flowchart
53
Table 3-3 Explanation of ~COPY~ Flowchart
61
Fig. 3-2 (COPY) Flowchart
65
Table 3-4 Explanation of ~JAM~ Flowchart
70
Fig. 3-4 Significant Operation Times
77
Fig. 3-7 Voltage Regulator
79
Fig. 3-8 Original Illumination Circuit
80
Table 3-5 Explanation of "Heater Wait" Flowchart
82
Fig. 3-11 Developer Monitoring Circuitry
85
Fig. 3-12 "Toner Feed" Flowchart
86
Fig. 3-13 "Developer Low"Flowchart
86
Fig. 3-16 Paper Cassette Monitoring Circuitry
89
Fig.3-17 "Cassette Empty"Flowchart
90
Fig. 3-18 "Cassette Not Seated" Flowchart
91
Fig. 3-19 Heater Control Circuit &Associated Components
92
Table 3-6 Explanation of Heater Operation Flowchart
93
Fig. 3-20 Heater Operation Flowchart
95
Fig. 3-22 1/4 Zero -Cross Circuit
97
Fig. 3-23 1/4 "Zero-Cross" Waveforms
98
Fig. 3-24 1/1 Zero-Cross Circuit
99
Fig. 3-25 1/1 "Zero-Cross" Waveforms
100
Fig. 3-26 Voltage Adapter Pedestal -Schematic Diagram
101
Table 3-7 Voltage Converter Specifications
101
Outline of Assembly Operation
103
Assembly Main Components
103
Fig. 4-1 Copyboard Assembly Main Components
103
Fig. 4-3 Rear Rail Components
105
Fig. 4-4 Roller Unit Positioning
106
Removal/Installation Actions
107
Fig. 4-6 Copyboard Wire Installation (B)
108
Fig. 4-7 Copyboard Wire Installation (C)
108
Fig. 4-8 Copyboard Wire Installation (D)
108
Repair/Servicing Actions
109
Fig. 49 Measuring of Wire Tension
109
Fig. 4-10 Wire Tension Adjustment
109
Fig. 4-12 Paper Feed Cam Adjustment
110
Outline of Assembly Operation
111
Assembly Main Components
111
Fig. 4-13 Illumination Assembly Main Components
111
Fig. 4-14 Lamp Illumination Pattern
112
Fig. 415 Electromagnetic Field Radiator Mounting
112
Removal/Installation Actions
113
Fig. 4-16 Removal of Lamps
113
Repair/Servicing Actions
114
Fig. 417 Block Diagram of Light Travel
115
Fig. 4-18 Optical Assembly Main Components
116
Fig. 4-19 Exposure Mask Removal
117
Fig. 4-20 Adjust Line Replacement (A)
119
Fig. 4-21 Adjust Line Replacement (B)
119
Fig. 4-22 Adjust Line Replacement (C)
120
Fig. 4-23 Adjust Line Replacement (D)
120
Fig. 4-24 Exposure Mask Adjustment
121
Fig. 4-25 Drum Assembly Main Components
122
Fig. 4-27 Drum Position in Copier (from Copier Front)
124
Fig. 428 Drum Unit Reassembly
125
Table 4-1 Corona Wire Specifications
126
Fig. 4-29 Eliminator Assembly Removal
127
Fig. 4-30 Paper Guide Wire Replacement
128
Fig. 431 Corona Wire Loop
129
Fig. 4-32 Attaching Corona Wire
129
Fig. 433 Wiring Procedure
130
Fig. 4-34 Corona Wire Adjustment (Positive Corona Assembly Illustrated)
131
Fig. 4-35 Developer Assembly Main Components
133
Fig. 4-36 ATR Subassembly Main Components
134
Fig. 4-37 Developer Flow through ATR Subassembly
135
Fig. 4-38 Toner Density Monitoring
135
Fig. 4-39 Developing Tray Main Components
135
Fig. 440 Squeezing Roller Main Components
136
Fig. 4-41 Reservoir Cover Components (Underside View)
137
Fig. 4-42 Circulation of Developer in the
138
Fig. 4-43 Replenishing Mechanism Main Components
138
Fig. 4-44 Toner Replenishment Actuation
139
Fig. 4-45 Normal Developer Level
140
Fig. 4-46 Lowered Level
140
Fig. 4-47 Reservoir Cover (Underside View)
141
Fig. 4-49 Replenishment Lever Adjustment
143
Fig. 4-51 Developer Float Adjustment
145
Fig. 4-52 Drum Cleaner Assembly Main Components (from Copier Front)
146
Fig. 4-54 Adjustment of Cleaner Blade Pressure (A)
149
Table 4-2 Adjustment Plate Movement
150
Fig. 456 Cassette Holder Assembly Main Components
151
Fig. 4-57 Cassette Assembly Main Components
153
Table 4-3 Spring Specifications
154
Table 4-4 Spring Pressure for Cassette Assemblies
155
Fig. 458 Pickup Roller Rotation Drive
156
Fig. 4-60 Pickup Roller Up-Down Drive
158
Fig. 4-61 Timing Roller Drive Components
158
Fig. 4-62 Controller Assembly Operation (A)
159
Fig
161
Fig. 4-69 Paper Pickup/Feeding Operation
163
Fig. 4-70 Paper Pickup Roller Assembly Main Components
164
Fig. 4-71 Drive Chain Removal
165
Fig. 4-72 Timing Roller Drive Main Components
166
Fig. 4-73 Timing Roller Drive Disassembly (A)
167
Fig. 4-74 Timing Roller Drive Disassembly (B)
167
Fig. 4-75 Paper Feed Cam Drive Main Components
168
Fig. 4-76 Paper Feed Cam Drive Disassembly (A)
169
Fig. 4-77 Paper Feed Cam Drive Disassembly (B)
169
Fig. 4-78 Paper Feed Cam Drive Disassembly (C)
170
Fig. 4-79 Paper Feed Cam Drive Disassembly (D)
170
Fig. 4-81 Pickup Roller Spacing
171
Fig. 4-82 Pickup Roller Height
172
Fig. 4-83 Pickup Roller Height Adjustment
173
Fig. 4-84 Paper Feed Cam Drive Lubrication
173
Fig. 4-85 Timing Roller Drive Lubrication
174
Fig. 4-86 Copy Conveying Assembly Main Components
175
Fig. 4-87 Upper and Lower Rollers
176
Fig. 4-88 Copy Paper Guide and Jam Detection Lamp
177
Fig. 491 Pivot Shaft Removal
179
Fig. 4-92 Copy Paper Guide Lacing Pattern
180
Fig. 4-93 Correct Chain Positioning
181
Fig. 494 Partitioning Plate Height Adjustment
181
Fig. 4-95 Positions of Screws a and B
182
Fig. 4-96 Movement of Separation Belt (from Copier Rear)
183
Fig. 4-97 Paper Separating Subassembly Main Components
184
Fig. 4-99 Heater Element Types
188
Fig. 4-100 Suction Blower Assembly Main Components
190
Fig. 4-101 Air Input Blower Assembly Main Components
191
Fig. 4-102 Fan Assembly Main Components
191
Fig. 4-103 Blower Blade Drum Adjustment
193
Fig. 4-104 Copy Selector Subassembly Main Components
194
Fig. 4-105 Ratchet Wheel Position
195
Fig. 4-106 Copy Selector Operation (A)
196
Fig. 4-107 Copy Selector Operation (B)
196
Fig. 4-108 Copy Selector Operation (C)
197
Fig. 4-109 Copy Selector Operation (D)
197
Fig. 4-110 Stop Button Operation
198
Fig. 4-112 Copy Selector Reassembly
199
Fig. 4-113 Click and Ratchet Wheel Positioning (Top View)
200
Fig. 4-114 Safety Assembly Main Components
201
Fig. 4115 Door Switch Group Main Components
202
Fig. 4116 Door Switch Group Operation (A)
203
Fig. 4-117 Door Switch Group Operation (B)
203
Fig. 4-118 Door Switch Group Operation (C)
204
Fig. 4-119 Door Switch Group Operation (D)
204
Fig. 4-120 Jam Stop Group Main Components
205
Fig. 4-121 Jam Stop Group Operation (A)
205
Fig. 4122 Jam Stop Group Operation (B)
206
Fig. 4-123 Adjustment of Front Safety Lever
207
Fig. 4-124 Jam Stop Group Adjustments
207
Fig. 4-125 Driving Mechanism Operation (A)
208
Fig. 4-126 Driving Mechanism Operation (B)
208
Fig. 4-127 Driving Mechanism Operation (C)
209
Fig. 4-128 Copyboard Reciprocation Operation
210
Copyboard Driving Mechanism Assembly
211
Appendix A (Copier -General)
213
Photocopier Schematic Diagram, Prod
213
Photocopier Schematic Diagram, Prod. No. 8-11156/57
213
Photocopier Wiring Diagram, Prod. No. 8-11156/57
213
Photocopier Wiring Diagram, Prod
213
Appendix B (Specific Circuits)
213
Heater Control Circuit Schematic Diagrams Printed-Circuit Board Layouts (1 of 3) Printed-Circuit Board Layouts (2 of 3) Printed-Circuit Board Layouts (3 of 3)
213
Appendix C (Electrical Parts)
213
Microswitch Timing Chart, All Copiers
215
Photocopier Wiring Diagram, Prod. No. 8-11154/55 (1
222
Photocopier Wiring Diagram, Prod
225
Parts List -Copier Common Components
233
Parts List -Product Number Distinctive Components
239
Parts List -Heater Control Circuits
241
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