Ricoh B268 Manuals

Manuals and User Guides for Ricoh B268. We have 1 Ricoh B268 manual available for free PDF download: Service Manual

Ricoh B268 Service Manual

Ricoh B268 Service Manual (266 pages)

Machine Code B245/B268/B269/B276/B277

Brand: Ricoh | Category: All in One Printer | Size: 2.81 MB

Table of Contents

Service Manual
1
Table of Contents
2
Read this First
10
- Safety Notices and Symbols & Abbreviations
  10
  - Important Safety Notices
    10
  - Laser Safety
    11
- Symbols and Abbreviations
  11
Installation
12
- Installation Requirements
  12
  - Environment
    12
  - Machine Level
    13
  - Minimum Space Requirements
    13
  - Power Requirements
    13
- Copier Installation
  14
  - Power Sockets for Peripherals
    14
  - Accessory Check
    14
  - Installation Procedure
    15
- Platen Cover Installation
  19
- ARDF Installation
  20
  - Accessory Check
    20
  - Installation Procedure
    21
- ADF Installation
  24
  - Accessory Check
    24
  - Installation Procedure
    25
- Two-Tray Paper Tray Unit Installation
  28
  - Accessory Check
    28
  - Installation Procedure
    28
- One-Tray Paper Tray Unit Installation
  33
  - Accessory Check
    33
  - Installation Procedure
    33
- One-Bin Tray Installation
  37
  - Accessory Check
    37
  - Installation Procedure
    37
- Anti-Condensation Heater Installation
  40
- Tray Heaters
  41
- Key Counter Installation
  48
- GDI Expansion
  51
  - Accessory Check
    51
  - Installing Expansion Component
    51
- Installing Panels and Keys
  53
Preventive Maintenance
54
- PM Tables
  54
- How to Reset the PM Counter
  56
Replacement and Adjustment
58
- General Cautions
  58
  - PCU (Photoconductor Unit)
    58
  - Transfer Roller
    58
  - Scanner Unit
    58
  - Laser Unit
    59
  - Fusing Unit
    59
  - Paper Feed
    59
- Special Tools and Lubricants
  60
- Exterior Covers & Operation Panel
  61
  - Rear Cover
    61
  - Rear Lower Cover (Two-Tray Models Only)
    61
  - Copy Tray
    62
  - Upper Covers
    62
  - Left Cover
    63
  - Front Cover
    63
  - Front Right Cover
    64
  - Right Rear Cover
    64
  - Right Door (Duplex Unit (B269/B277))
    65
  - By-Pass Tray
    65
  - Left Lower Cover (Two-Tray Models Only)
    66
  - Right Lower Cover (Two-Tray Models Only)
    66
  - Platen Cover Sensor
    67
- Scanner Unit
  68
  - Exposure Glass/Df Exposure Glass
    68
  - Lens Block
    68
  - Lamp Stabilizer Board and Exposure Lamp
    70
  - Original Width/Length Sensor
    70
  - Scanner Motor
    72
  - Scanner Home Position Sensor
    73
  - Adjusting Scanner Positions
    74
- Laser Unit
  78
  - Location of Caution Decal
    78
  - Toner Shield Glass
    78
  - Laser Unit
    79
  - LD Unit
    79
  - Polygonal Mirror Motor
    80
  - Laser Unit Alignment Adjustment
    81
- PCU Section
  83
  - Pcu
    83
  - Pick-Off Pawls and Toner Density Sensor
    84
  - OPC Drum
    85
  - Charge Roller and Cleaning Brush
    86
  - Cleaning Blade
    87
  - Developer
    88
  - After Replacement or Adjustment
    89
- Toner Supply Motor
  90
- Paper Feed Section
  91
  - Paper Feed Roller
    91
  - Friction Pad
    92
  - Paper End Sensor
    92
  - Exit Sensor
    93
  - By-Pass Feed Roller and Paper End Sensor
    94
  - Registration Roller
    95
  - By-Pass Paper Size Switch
    96
  - Registration Clutch
    97
  - Registration Sensor
    97
  - Upper Paper Feed Clutch and By-Pass Feed Clutch
    98
  - Relay Clutch
    98
  - Relay Sensor
    99
  - Lower Paper Feed Clutch (Two-Tray Models Only)
    99
  - Vertical Transport Sensor (Two-Tray Models Only)
    100
  - Paper Size Switch
    100
- Image Transfer
  101
  - Image Transfer Roller
    101
  - Image Density Sensor
    102
- Fusing
  103
  - Fusing Unit
    103
  - Thermistor
    103
  - Fusing Lamps
    104
  - Hot Roller Stripper Pawls
    105
  - Hot Roller
    105
  - Thermostat
    106
  - Pressure Roller and Bushings
    106
  - NIP Band Width Adjustment
    107
  - Cleaning Roller
    108
- Duplex Unit (Duplex Models B269/B277 Only)
  109
  - Duplex Exit Sensor
    109
  - Duplex Entrance Sensor
    109
  - Duplex Inverter Sensor
    110
  - Duplex Transport Motor
    111
  - Duplex Inverter Motor
    111
  - Duplex Control Board
    112
- Other Replacements
  113
  - Quenching Lamp
    113
  - High-Voltage Power Supply Board
    113
  - BICU (Base-Engine Image Control Unit)
    114
  - Main Motor
    114
  - Rear Exhaust Fan (B269/B277 Only)
    115
  - Left Exhaust Fan
    116
  - PSU (Power Supply Unit)
    116
  - Gearbox
    117
- Copy Adjustments Printing/Scanning
  120
  - Printing
    120
  - Scanning
    122
  - ADF Image Adjustment
    124
Troubleshooting
126
- Service Call Conditions
  126
  - Summary
    126
  - SC Code Descriptions
    126
- Electrical Component Defects
  137
  - Sensors
    137
  - Switches
    138
- Blown Fuse Conditions
  140
- LED Display
  141
  - Bicu
    141
Service Tables
142
- Service Program Mode
  142
  - How to Enter the SP Mode
    142
- SP Mode Tables
  144
  - SP1-XXX (Feed)
    144
  - SP2-XXX (Drum)
    146
  - SP4-XXX (Scanner)
    150
  - SP5-XXX (Mode)
    155
  - SP6-XXX (Peripherals)
    157
  - SP7-XXX (Data Log)
    158
  - SP8-XXX (History)
    162
  - SP9-XXX (Etc.)
    165
- Using SP Modes
  166
  - Adjusting Registration and Magnification
    166
  - ID Sensor Error Analysis (SP 2221)
    167
  - Display APS Data (SP 4301 1)
    167
  - Memory Clear
    168
  - Input Check (SP 5803)
    170
  - Output Check (SP 5804)
    172
  - Serial Number Input (SP 5811)
    174
  - NVRAM Data Upload/Download (SP 5824/5825)
    174
  - Firmware Update Procedure
    176
  - Test Pattern Print (SP 5902 1)
    179
  - Paper Jam Counters (SP 7504)
    181
  - SMC Print (SP 5990)
    181
  - Original Jam History Display (SP 7508)
    182
  - ADF APS Sensor Output Display (SP 6901)
    183
Detailed Section Descriptions
184
- Overview
  184
  - Component Layout
    184
  - Paper Path
    185
  - Drive Layout
    186
- Board Structure
  187
  - Block Diagram
    187
  - BICU (Base Engine and Image Control Unit)
    187
  - SBU (Sensor Board Unit)
    188
- Copy Process Overview
  189
- Scanning
  191
  - Overview
    191
  - Scanner Drive
    192
  - Original Size Detection in Platen Mode
    193
- Image Processing
  195
  - Overview
    195
  - SBU (Sensor Board Unit)
    196
  - IPU (Image Processing Unit)
    197
  - Video Control Unit (VCU)
    208
- Laser Exposure
  209
  - Overview
    209
  - Auto Power Control (APC)
    210
  - LD Safety Switch
    211
- Photoconductor Unit (PCU)
  212
  - Overview
    212
  - Drive
    213
- Drum Charge
  214
  - Overview
    214
  - Charge Roller Voltage Correction
    215
  - ID Sensor Pattern Production Timing
    216
  - Drum Charge Roller Cleaning
    216
- Development
  217
  - Overview
    217
  - Drive
    218
  - Developer Mixing
    218
  - Development Bias
    219
  - Toner Supply
    220
  - Toner Supply Mechanism
    221
  - Toner Density Control
    221
  - Toner Supply in Abnormal Sensor Conditions
    225
  - Toner Near End/End Detection and Recovery
    225
- Drum Cleaning and Toner Recycling
  227
  - Drum Cleaning
    227
  - Toner Recycling
    228
- Paper Feed
  229
  - Overview
    229
  - Paper Feed Drive Mechanism
    230
  - Paper Feed and Separation Mechanism
    230
  - Paper Lift Mechanism
    231
  - Paper End Detection
    231
  - Paper Size Detection
    232
  - Side Fences
    234
  - Paper Registration
    234
- Image Transfer and Paper Separation
  236
  - Overview
    236
  - Image Transfer Current Timing
    237
  - Transfer Roller Cleaning
    237
  - Paper Separation Mechanism
    238
- Image Fusing and Paper Exit
  239
  - Overview
    239
  - Fusing Unit Drive and Release Mechanism
    240
  - Fusing Entrance Guide Shift
    241
  - Pressure Roller
    242
  - Fusing Temperature Control
    242
  - Overheat Protection
    244
- Duplex Unit
  246
  - Overall
    246
  - Drive Mechanism
    247
  - Basic Operation
    247
  - Feed in and Exit Mechanism
    250
- Energy Saver Modes of Basic Machines
  251
  - Overview
    251
  - Aof
    252
  - Timers
    252
  - Recovery
    252
- Energy Saver Modes of GDI Machines
  253
  - Overview
    253
  - Aof
    254
  - Timers
    254
  - Recovery
    254
Specifications
255
- General Specifications
  255
- Supported Paper Sizes
  258
  - Original Size Detection
    258
  - Paper Feed and Exit
    260
- Machine Configuration
  262
- Optional Equipment
  264
  - Ardf
    264
  - Adf
    264
  - One-Tray Paper Tray Unit
    265
  - Two-Tray Paper Tray Unit
    265
  - One-Bin Tray
    265

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