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Ricoh
All in One Printer
A156
Ricoh A156 User Manual
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2.
COMPONENT LAYOUT
— Mechanical Components —
1.
Bins
2.
Transfer
Wheel
3.
Exit
Roller
4.
Upper P
aper Guide
5. Lower Pa
per Guide
6.
Bin Gu
ide
— Electrical Com
ponents —
1. Sorter Main Board
5. Bin Drive Motor
2.
Wheel S
witch
6. S
orter Switc
h
3. Roller Drive Motor
7. Bin Home Position Swit
ch
4.
Pap
er
Sens
or
[1]
[3]
[5]
[4]
[2]
[6]
[7]
[6]
[5]
[4]
[3]
[2]
[1]
A156/A160/A162
9-2
STM
262
264
Table of Contents
Default Chapter
1
Service Manual
1
Table of Contents
13
Important Safety Notices
23
Overall Machine Information
27
Specifications
29
Machine Configuration
33
Copier
33
Optional Equipment
34
Mechanical Component Layout
35
Paper Path
38
Normal Copying
38
Duplex Copying
39
Electrical Component Descriptions
40
5 Electrical Component Descriptions
45
Drive Layout
45
All Models
45
A153/A156
46
A157/A160/A161/A162
46
Detailed Descriptions
47
Process Control
49
Overview
49
Copy Process Around the Drum
49
Factors Affecting Process Control
52
Process Control Procedures
53
Drum Potential Control
54
Copy Image Control
56
Image Density Control
59
Overview
59
VSP and VSG Detection
59
ID Correction for the
60
SP Pattern
60
Toner Supply Control During Copying
62
Toner Supply in Abnormal Sensor Conditions
65
Drum Potential Control
66
R Pattern Correction
66
L Pattern Correction
69
T/H Correction
72
Process Control During Abnormal Conditions
74
Process Control and Sensor Detection Timing
75
Process Control Checks During Machine Operation
76
Copy Image Control
78
Manual ID Correction
79
Reproduction Ratio Correction
79
ADS Correction
79
Drum
80
Drum Unit
80
Drive Mechanism
81
Drum Charge
82
Overview
82
Drum Charge Roller Drive Mechanism
83
Drum Charge Roller Cleaning
85
Temperature Compensation
86
Optics
87
Overview
87
Scanner Drive
89
Lens Drive
90
Horizontal Lens Positioning
91
Original Alignment Position
91
Paper Size
91
Reproduction Ratio
92
3Rd Scanner Drive
93
Uneven Light Intensity Correction
94
Original Size Detection in Platen Mode
95
Automatic Image Density Control System (Ads)
97
Erase
99
Overview
99
Leading Edge and Trailing Edge Erase
100
Side Erase
100
Development
101
Overview
101
Drive Mechanism
102
Cross-Mixing
103
Toner Density Sensor
104
Development Bias Control
105
Toner Supply
106
Toner Bottle Replenishment Mechanism
106
Toner Supply Mechanism
107
Toner End Detection
108
Image Transfer and Paper Separation
109
Pre-Transfer Lamp
109
Image Transfer and Paper Separation
110
Image Transfer and Paper Separation Mechanism
111
Transfer Belt Unit Lift Mechanism
113
Paper Transportation and Belt Drive Mechanism
114
Transfer Belt Cleaning Mechanism
115
Transfer Belt Unit Release Mechanism
117
Drum Cleaning
118
Overview
118
Cleaning Blade Pressure Mechanism and Side-To-Side Movement
120
Toner Collection Mechanism
121
Toner Recycling
122
Overview
122
New Toner and Recycled Toner Mixture
123
Quenching
124
Paper Feed and Registration
125
Overview
125
Paper Feed Mechanism [A153/A156]
126
Drive Mechanism
126
Slip Clutch Mechanism
127
Separation Roller Release Mechanism
128
Paper Feed Drive Mechanism [A157/A160]
129
Paper Lift Mechanism
130
Paper End Detection
133
Paper Size Detection
135
Side Fence Double Stopper Mechanism [A157/A160]
136
Large Capacity Tray
137
Paper Lift Mechanism
137
Paper Feed Mechanism
138
Paper End Detection
138
By-Pass Feed Table
139
Feed Mechanism/Paper End Detection
139
By-Pass Feed Paper Width Detection
140
Paper Registration
141
Paper Feed and Misfeed Detection Timing
142
Paper Feed Tray
142
By-Pass Feed
144
Drive Mechanism
146
Turn Guide Section
147
Duplex Entrance to Duplex Tray
148
Duplex Stacking
149
Paper Feed from the Duplex Tray
150
Tray Lift Mechanism
150
Paper Feed System
151
Image Fusing
152
Overview
152
Fusing Drive and Release Mechanism
153
Fusing Entrance Guide Shift Mechanism
154
Pressure Roller
155
Cleaning Mechanism
155
Fusing Lamp Control
156
Overheat Protection
159
Energy Saver Functions
159
Main Fusing Lamp Interchangeability
159
Auto Reverse Document Feeder A548
161
Specifications
163
Component Layout
164
Mechanical Components
164
Electrical Components
165
Electrical Component Description
166
Detailed Descriptions
167
Original Pick-Up Mechanism
167
Separation and Paper Feed Mechanism
168
Friction Belt Drive Mechanism
169
Original Size Detection
170
Paper Transport Mechanism
171
Thick/Thin Original Modes
172
Original Feed-Out Mechanism
173
Two-Sided Original Feed Mechanism
174
Timing Charts
175
A4 Sideways: 1 Sided Original
175
Combine 2 Original Mode
176
A4 Sideways: Duplex
177
Paper Tray Unit
179
Specifications
181
Component Layout
182
Mechanical Component Layout
182
Drive Layout
183
Overview
185
Drive Mechanism
186
Paper Feed and Misfeed Detection Timing
195
Specifications
198
1 Specifications
200
Component Layout
200
Mechanical Component Layout
200
Drive Layout
201
Electrical Component Description
202
Basic Operation
204
Normal Mode and Sort/Stack Mode
204
Staple Mode
206
Turn Gate Section
208
Roller Drive and Control
209
Bin Drive and Control
211
Jogger Section
214
Grip Assembly
216
Stapler
218
Jam Detection and Stapler Error
221
Sorter Jams
221
Stapler Error
222
Timing Charts
223
Sorter Stapler A555
226
Specifications
228
Component Layout
230
Mechanical Component Layout
230
Drive Layout
231
Electrical Component Description
232
Basic Operation
233
Normal Mode and Sort/Stack Mode
233
Staple Mode
235
Bin Drive Mechanism
237
Bin Home Position
238
Jogger Mechanism
239
Grip Assembly
240
Stapler Unit
241
Stapler Switch
242
Paper Feed and Misfeed Detection Timing
243
Jam Detection
245
Sorter A556
246
Specifications
248
Mechanical Component Layout
249
Electrical Component Layout
250
Electrical Component Descriptions
251
Basic Operation
252
Example of Sort Mode Operation
253
Bin Drive Mechanism
255
Bins
257
Exit Rollers
258
Timing Chart
259
Sorter A557
260
Specifications
262
Component Layout
263
Electrical Component Descriptions
264
Basic Operation
265
4
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Ricoh A156 Specifications
General
Brand
Ricoh
Model
A156
Category
All in One Printer
Language
English
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