User Manuals: Ricoh 2738 Printer

Manuals and User Guides for Ricoh 2738 Printer. We have 1 Ricoh 2738 Printer manual available for free PDF download: Service Manual

Ricoh 2738 Service Manual

Ricoh 2738 Service Manual (313 pages)

Brand: Ricoh | Category: All in One Printer | Size: 5 MB

Table of Contents

Service Manual
1
Laser Safety
3
Table of Contents
4
1 Overall Machine Information

18
- Specifications
  18
- Machine Configuration
  22
  - System Components
    22
  - Installable Option Table
    24
    
    Copier Options
    24
    
    Fax Option
    24
    
    Printer/Scanner Options
    24
- Paper Path
  25
- Mechanical Component Layout
  26
- Electrical Component Descriptions
  28
- Electrical Component Layout
  28
- Electrical Component Description
  29
- Drive Layout
  31
- Copy Process
  32
  - Overview
    32
- Board Structure
  34
  - Overview
    34
  - Controller
    36
2 Detailed Section Descriptions

38
- Scanning
  38
  - Overview
    38
  - Scanner Drive
    39
  - Original Size Detection in Platen Mode
    40
- Image Processing
  42
  - Overview
    42
  - Sbu (Sensor Board Unit)
    43
  - Auto Image Density
    44
  - Ipu (Image Processing Unit)
    45
    
    Overview
    45
    
    Image Processing Modes
    46
    
    Image Processing Path
    47
    
    Overview
    47
    
    SP Modes for each Image Processing Step
    48
    
    Text Mode
    48
    
    Photo Mode
    49
    
    Text/Photo Mode
    50
    
    Pale Mode
    51
    
    Generation Copy
    52
    
    Auto Shading
    53
    
    Pre-Filtering
    53
    
    Main Scan Magnification/Reduction
    53
    
    Mirroring for ADF Mode
    53
    
    Characteristic Detection
    54
    
    Filtering
    54
    
    Overview
    54
    
    MTF Filter
    54
    
    Smoothing Filter
    54
    
    Characteristic Filter
    54
    
    Independent Dot Erase
    55
    
    Background Erase
    55
    
    Gradation Processing
    55
    
    Overview
    55
    
    Grayscale Processing
    56
    
    Binary Picture Processing
    56
    
    Error Diffusion
    56
    
    Dithering
    56
    
    Line Width Correction
    56
  - Video Control Unit (Vcu)
    57
    
    Fine Character and Image (FCI)
    57
- Laser Exposure
  58
  - Overview
    58
  - Auto Power Control (Apc)
    59
  - Ld Safety Switch
    60
- Photoconductor Unit (Pcu)
  61
  - Overview
    61
  - Drive
    62
  - New Pcu Detection
    63
- Drum Charge
  64
- Development
  68
  - Overview
    68
  - Drive
    69
  - Developer Mixing
    70
  - Development Bias
    71
  - Toner Supply
    72
    
    Toner Bottle Replenishment Mechanism
    72
    
    Toner Supply Mechanism
    73
  - Toner Density Control
    74
    
    Overview
    74
    
    Toner Density Sensor Initial Setting
    76
    
    Toner Density Measurement
    76
    
    Vsp/Vsg Detection
    76
    
    Toner Supply Reference Voltage (Vref) Determination
    76
    
    Toner Supply Determination
    76
    
    Toner Supply Motor on Time Determinations
    77
  - Toner Supply in Abnormal Sensor Conditions
    78
    
    ID Sensor
    78
    
    TD Sensor
    78
  - Toner Near End/End Detection and Recovery
    78
    
    Toner Near End Detection
    78
    
    Toner Near End Recovery
    79
    
    Toner End Detection
    79
    
    Toner End Recovery
    79
- Drum Cleaning and Toner Recycling
  80
  - Drum Cleaning
    80
  - Toner Recycling
    81
- Paper Feed
  82
  - Overview
    82
  - Paper Feed Drive Mechanism
    83
  - Paper Feed and Separation Mechanism
    84
  - Paper Lift Mechanism
    85
  - Paper End Detection
    86
  - Paper Height Detection
    87
  - Feed Pressure Adjustment for Paper Size
    88
    
    Overview
    88
    
    Paper Size Thresholds
    88
    
    Feed Pressure Adjustment
    89
    
    Effect of the Amount of Remaining Paper
    89
    
    From Tray Full to Paper Near-End
    89
    
    From Paper Near End to Paper End
    90
  - Paper Size Detection
    91
  - Special Paper Setting
    92
  - Side and End Fences
    93
    
    Side Fences
    93
    
    End Fence
    93
  - Paper Registration
    94
- Image Transfer and Paper Separation
  95
  - Overview
    95
  - Image Transfer Current Timing
    96
  - Transfer Roller Cleaning
    97
  - Paper Separation Mechanism
    97
- Image Fusing and Paper Exit
  98
  - Overview
    98
  - Fusing Drive and Release Mechanism
    99
  - Fusing Entrance Guide Shift Mechanism
    100
  - Pressure Roller
    101
  - Cleaning Mechanism
    101
  - Fusing Temperature Control
    102
    
    Temperature Control
    102
    
    Fusing Lamp Control
    103
  - Overheat Protection
    104
  - Paper Exit
    104
- Energy Saver Modes
  105
  - Overview
    105
  - Energy Saver Mode
    106
    
    Entering the Energy Saver Mode
    106
    
    What Happens in Energy Saver Mode
    106
    
    Return to Stand-By Mode
    106
  - Auto off Mode
    107
    
    Entering off Stand-By and off Modes
    107
    
    Off Stand-By Mode
    107
    
    Off Mode
    107
    
    Returning to Stand-By Mode
    107
3 Installation Procedure

108
- Installation Requirements
  108
  - Environment
    108
  - Machine Level
    108
  - Minimum Space Requirements
    109
  - Power Requirements
    110
- Copier Installation
  111
  - Power Sockets for Peripherals
    111
  - Installation Flow Chart
    112
  - Accessory Check
    113
  - Installation Procedure
    114
- Paper Tray Unit Installation
  118
  - Accessory Check
    118
  - Installation Procedure
    118
- Lct Installation
  121
  - Accessory Check
    121
  - Installation Procedure
    121
- Auto Reverse Document Feeder Installation
  124
  - Accessory Check
    124
  - Installation Procedure
    124
- Interchange Unit Installation
  127
  - Component Check
    127
  - Installation Procedure
    128
- 1-Bin Tray Unit Installation
  130
  - Component Check
    130
  - Installation Procedure
    130
- Shift Tray
  133
  - Component Check
    133
  - Installation Procedure
    133
- By-Pass Feed Unit Installation
  135
  - Components Check
    135
  - Installation Procedure
    135
- Duplex Unit Installation
  137
  - Accessory Check
    137
  - Installation Procedure
    138
- Bridge Unit Installation
  140
  - Accessory Check
    140
  - Installation Procedure
    140
- 1,000-Sheet Finisher Installation
  142
  - Accessory Check
    142
  - Installation Procedure
    143
- 500-Sheet Finisher Installation
  146
  - Accessory Check
    146
  - Installation Procedure
    147
- Platen Cover Installation
  149
  - Memory (G578/G579)
    150
  - Hdd (B420)
    151
- Key Counter Installation
  153
- Anti-Condensation Heater
  155
- Tray Heater
  156
- Tray Heater (Optional Paper Tray Unit)
  158
- Tray Heater (Optional Lct)
  161
4 Service Tables

164
- General Caution
  164
  - Pcu (Photoconductor Unit)
    164
  - Transfer Roller Unit
    164
  - Scanner Unit
    164
  - Laser Unit
    165
  - Fusing Unit
    165
  - Paper Feed
    165
  - Others
    165
- Service Program Mode
  166
  - Service Program Mode Operation
    166
    
    Entering and Exiting SP Mode
    166
    
    SP Mode Button Summary
    167
    
    Switching between SP Mode and Copy Mode for Test Printing
    168
    
    Selecting the Program Number
    168
  - Service Program Mode Tables
    169
    
    SP1-XXX: Feed
    169
    
    SP2-XXX: Drum
    179
    
    SP4-XXX: Scanner
    188
    
    SP5-XXX: Mode
    194
    
    SP6-XXX: Peripherals
    204
    
    SP7-XXX: Data Log
    206
    
    Tray Shift
    211
    
    SP9-XXX: Debug/Testing
    215
  - Test Pattern Printing (Sp2-902-3)
    216
  - Input Check
    217
    
    Main Machine Input Check (SP5-803)
    217
    
    ARDF Input Check (SP6-007)
    220
  - Original Trailing Edge Sensor
    220
    
    Finisher Input Check (SP6-117)
    221
  - Output Check
    223
    
    Main Machine Output Check (SP5-804)
    223
    
    Paper Feed Clutch
    223
    
    ARDF Output Check (SP6-008)
    225
    
    Finisher Output Check (SP6-118)
    225
- Stamp
  225
  - Smc Data Lists (Sp5-990)
    226
  - Memory All Clear (Sp5-801)
    227
    
    Using a Flash Memory Card
    227
    
    Without Using a Flash Memory Card
    228
Replacement and Adjustment

228
- Uploading/Downloading Nvram Data
  229
- Program Download
  234
- Software Reset
  235
- System Settings and Copy Setting Reset
  235
  - System Setting Reset
    235
  - Copier Setting Reset
    236
- User Tools
  237
  - System Settings
    237
  - Copier/Document Server Features
    238
  - Printer, Facsimile, Scanner Settings
    238
  - Inquiry
    238
  - Counter
    239
- Leds
  240
  - Controller
    240
  - Sbcu
    240
  - Ipu
    240
- Dip Switches
  240
  - Controller: DIP SW2
    240
  - Sbcu: Dip Sw102
    240
- Special Tools and Lubricants
  241
  - Special Tools
    241
  - Lubricants
    241
5 Preventive Maintenance Schedule

242
- Pm Table
  242
6 Replacement and Adjustment

245
- Scanner Unit
  245
  - Exposure Glass
    245
  - Scanner Exterior/Operation Panel
    246
- Left Cover
  246
  - Lens Block Assembly
    247
  - Original Size Sensors
    248
  - Exposure Lamp
    249
  - Scanner Motor/Lamp Stabilizer
    250
  - Scanner Wires
    251
- Laser Unit
  254
  - Caution Decal Locations
    254
  - Laser Unit
    255
  - Polygon Mirror Motor
    256
  - Ld Unit
    256
  - Laser Synchronization Detector
    257
- Photoconductor Unit (Pcu)
  258
  - Pcu
    258
- Transfer Unit
  259
  - Transfer Roller Unit
    259
  - Image Density Sensor
    260
  - Thermistors
    261
- Fusing/Exit
  261
  - Thermofuse
    262
  - Hot Roller and Fusing Lamp
    264
  - Pressure Roller/Cleaning Roller
    265
  - Paper Exit Sensor/Paper Overflow Sensor
    266
- Paper Feed
  267
  - Feed Rollers
    267
  - Paper End Sensor
    268
  - Paper Tray Lift Motors
    269
  - Registration Clutch
    270
  - Paper Feed Clutches
    271
    
    Lower Paper Feed Clutch
    271
    
    Upper Paper Feed Clutch
    271
  - Relay Clutches
    272
  - Paper Size Detector
    273
  - Registration Sensor
    274
  - Relay Sensors
    275
    
    Upper Relay Sensor
    275
    
    Lower Relay Sensor
    275
- Pcbs and Other Items
  276
  - Controller Board
    276
  - Sbcu Board
    277
  - Main Motor
    278
  - Psu
    279
- Copy Adjustments: Printing/Scanning
  280
  - Printing
    280
    
    Registration - Leading Edge/Side-To-Side
    280
    
    Blank Margin
    281
    
    Main Scan Magnification
    281
    
    Parallelogram Image Adjustment
    282
  - Scanning
    283
    
    Registration: Platen Mode
    283
    
    Magnification
    283
    
    Standard White Density Adjustment
    284
  - Adf Image Adjustment
    285
    
    Registration
    285
    
    Sub Scan Magnification
    285
  - Touch Screen Calibration
    286
7 Troubleshooting

287
- Service Call Conditions
  287
  - Sc Code Descriptions
    288
  - Rear Fence Motor
    290
- Self-Diagnostic Mode
  298
  - Self-Diagnostic Mode at Power on
    298
  - Detailed Self-Diagnostic Mode
    299
- Feed Belt
  302
- Electrical Component Defects
  303
  - Switches
    305
- Blown Fuse Conditions
  306
- Registration Sensor
  312
- Paper Size
  313

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