Ricoh A157 Manuals

Manuals and User Guides for Ricoh A157. We have 1 Ricoh A157 manual available for free PDF download: Service Manual

Ricoh A157 Service Manual (269 pages)

Ricoh A156/A212... Series Service manual

Brand: Ricoh | Category: All in One Printer | Size: 6.15 MB

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
- Drum Cleaning
  
  118
- 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

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Ricoh A157 Manuals

Ricoh A157 Service Manual (269 pages)

Table of Contents

Overall Machine Information

Specifications

Machine Configuration

Mechanical Component Layout

Paper Path

5 Electrical Component Descriptions

Drive Layout

Detailed Descriptions

Process Control

Drum

Drum Charge

Optics

Erase

Development

Image Transfer and Paper Separation

Drum Cleaning

Toner Recycling

Quenching

Paper Feed and Registration

Image Fusing

Auto Reverse Document Feeder A548

Specifications

Component Layout

Electrical Component Description

Detailed Descriptions

Timing Charts

Paper Tray Unit

Specifications

Component Layout

Overview

Drive Mechanism

Paper Feed and Misfeed Detection Timing

Specifications

1 Specifications

Component Layout

Basic Operation

Turn Gate Section

Roller Drive and Control

Bin Drive and Control

Jogger Section

Grip Assembly

Stapler

Jam Detection and Stapler Error

Timing Charts

Sorter Stapler A555

Specifications

Component Layout

Basic Operation

Sorter A556

Specifications

Mechanical Component Layout

Electrical Component Layout

Electrical Component Descriptions

Basic Operation

Example of Sort Mode Operation

Bin Drive Mechanism

Bins

Exit Rollers

Timing Chart

Sorter A557

Specifications

Component Layout

Electrical Component Descriptions

Basic Operation

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