User Manuals: Ricoh FT4430 Tabletop Copier

Manuals and User Guides for Ricoh FT4430 Tabletop Copier. We have 1 Ricoh FT4430 Tabletop Copier manual available for free PDF download: Service Manual

Ricoh FT4430 Service Manual

Ricoh FT4430 Service Manual (465 pages)

Brand: Ricoh | Category: Copier | Size: 16 MB

Table of Contents

Section 2

26
- Paper Path
  13
- Drive Layout
  16
- Electrical Component Descriptions
  19
- Printed Circuit Boards
  20
- Ac and DC Power Distribution
  22
- Overall Machine Control
  23
- Table of Contents
  26
- Selenium Drum
  28
- Overview
  30
  - Drum Charge
    30
  - Charge Corona Power Pack
    32
- Lead Edge Erase
  34
- Side Erase
  34
  - Side Erase Operation
    35
- Trail Edge Erase
  36
- Erase Lamp Circuit
  37
- Optics
  
  39
  - Scanner Drive
    40
    
    Scanner Drive Mechanism
    40
    
    Scanner Motor Control
    42
  - Lens/Mirrorpositioning
    43
    
    Lens Drive
    43
    
    Lens Positioning
    45
    
    Second Scanner Drive
    46
    
    Second Scanner Positioning
    47
  - Stepper Motor Control
    48
  - Automatic Image Density Sensing
    49
    
    Exposure Lamp Control
    50
    
    Service Call Conditions
    51
- Development
  
  52
- Overview
  
  52
  - Seals and End Magnets
    53
  - Cross-Mixing
    54
  - Image Density Control
    55
    
    Manualimag Edensitycontrol
    55
    
    Automatic Image Density Control
    56
    
    Bias Compensation Factors
    57
    
    Rest Time Compensation (V2)
    57
    
    Drum Temperature Compensation (V3)
    58
    
    Total Bias (VT)
    58
  - Bias for ID Sensing
    59
  - Color Development
    60
    
    Base Bias for Color
    60
    
    Bias Control
    60
    
    Bias for Ld Sensing
    60
    
    Overview
    60
    
    Color Detection
    61
  - Service Call Condition
    62
- Toner Density Detection and Toner Supply
  
  63
  - Toner Density Detection
    63
  - Toner Density Control
    65
  - Toner Supply
    66
    
    Roller Drive Mechanism
    66
    
    Toner Agitator Drive Mechanism
    67
  - Toner Supply Amount
    68
    
    Detect Supply Mode
    68
    
    Fixed Supply Mode
    68
  - Toner End Detection
    69
  - Colortonerdensity Detectionandcolor Toner Supply
    69
    
    Color Toner Density Control
    69
    
    Color Toner End Detection
    70
    
    Abnormal Condition
    71
  - Service Call Condition
    71
  - Image Transfer and Paper Separation
    72
    
    Image Transfer
    72
    
    Pre-Transfer Lamp (Pal)
    72
    
    Paper Separation
    73
    
    Pre-Transfer Lamp Circuit
    74
    
    Transfer/Separationcorona Circuit
    75
    
    Pick-Off Mechanism
    76
    
    Touch and Release Mechanism
    76
    
    Side to Side Movement
    77
    
    Pick-Off Circuit
    78
  - Drum Cleaning
    79
    
    Overview
    79
    
    Cleaning Blade
    81
    
    Toner Overflow Sensor Circuit
    83
    
    Cleaning Solenoid Circuit
    84
    
    Quenching Lamp
    85
    
    Paper Feed and Registration
    86
    
    Paper Lift Mechanism
    88
    
    Paper Feed Drive
    91
    
    Manual Feed
    92
    
    Paper Transport
    95
    
    Image Fusing and Paper Exit
    96
    
    Fusing Drive Mechanism
    97
    
    Oil Supply and Cleaning
    98
    
    Oil End Sensor
    99
    
    Fusing Exit Assembly
    100
    
    Image Fusing
    101
    
    Key Counter Holder Installation
    117
    
    Cassette Modification
    119
    
    Preparation for Transporting the Copier
    121
Section 4

124
- Po Table
  124
- Test Points
  
  129
  - DF Main Board
    129
  - Main Board
    129
  - Service Tables
    129
- DF Main Board
  
  130
  - Main Board
    130
- Variable Resisters
  
  130
  - Lamp Regulator
    130
- Dip Switches
  
  131
  - Operation Panel
    131
    
    1, Operation Panel
    131
  - DF Main Board
    131
  - Service Program Mode (Sp Mode) Operation
    132
- Data Check Mode
  
  132
- Service Program Mode (Spmode) Operation
  
  132
  - Data Change Mode
    132
- Service Program Modetable
  
  133
  - Service Remarks
    139
    
    Charge Corona
    139
    
    Handling the Drum
    139
    
    Optics
    140
    
    Cleaning
    141
    
    Development
    141
    
    Toner Supply
    141
    
    Transfer and Separation
    141
    
    8'. Fusing
    142
    
    Paper Feed
    142
    
    Document Feeder
    143
    
    Large Capacitytray
    143
    
    Others
    143
    
    Sorter
    143
  - Special Tools and Lubricants
    144
Section 5

146
- Optics
  
  148
  - Development and Toner Supply
    164
  - Cleaning Brush Replacement
    175
  - Blade Scraper Replacement
    176
  - Toner Collection Coil Replacement
    177
  - Pick-Off Pawl Replacement
    178
  - Cleaning Pressure Adjustment
    179
- Quenching
  
  181
  - Quenching Lamp Replacement
    181
- Paper Feed
  
  182
- Manual Feed Sensor Replacement
  
  185
  - Paper End Sensor Replacement
    186
  - Paper Size Sensor Replacement
    187
- Feed Pressure Adjustment
  
  188
  - Registration Clutch Adjustment
    189
  - Feedroller/Frictionpadgapadjustment (Lstand 2Nd Feed Station)
    190
- Fusing
  
  191
  - Fusing Unit Removal
    191
  - Hot Roller Replacement
    193
  - Pressure Roller Replacement
    195
  - Hot Roller Stripper Replacement
    196
  - Thermistor Replacement
    197
  - Thermofuse Replacement
    198
  - Fusing Pressure Adjustment
    199
  - Entrance Guide Hight Adjustment
    200
- Transport
  
  201
  - Transport Unit and Transpofl Belt Removal
    201
  - Vacuum Fan Motor Replacement
    203
- Corona
  
  204
  - Corona Wire Replacement
    204
  - Drum Current Adjustment
    208
  - Others
    214
    
    Operation Panel Removal
    214
  - Copy Image
    217
    
    Light Intensity Adjustment
    217
    
    Auto ID Sensor Adjustment
    219
    
    Horizontal Magnification Adjustment
    223
    
    Lead Edge Erase Margin Adjustment
    224
    
    Lead Edge Registration Adjustment
    224
    
    Vertical Magnification Adjustment
    224
  - Document Feeder
    225
Section 7

226
- Specifications
  227
- MECHANICAL COMPONENT Lqyout
  228
- Electrical Component Layout
  229
- Feed-In Unit Mechanism
  231
- Separation Mechanism
  232
- Misfeed Prevention
  233
- Wear Prevention
  234
- Friction Roller Release Mechanism
  235
- Registration
  236
- Feed-Out Mechanism
  
  237
- Lifting Mechanism
  
  238
  - Misfeed Check
    239
  - Document Feeder Installation
    240
    
    Accessory Check
    240
  - Replacement and Adjustment
    248
    
    DF Belt Replacement
    248
    
    Pick-Up Roller Replacement
    249
    
    Friction Roiler Replacement
    255
    
    Registration Roller Replacement
    258
    
    Stopper Plate Position Adjustment
    260
    
    Dfbelt Drive Motor Speed Adjustment
    261
    
    Lead Edge Registration Adjustment
    262
  - Sorter
    263
Section 8

264
- Sorter
  265
  - Mechanical Component Layout
    266
  - Electrical Component Layout
    267
  - Basic Operation
    268
    
    Clear Mode
    268
    
    Sort Mode
    268
    
    Stack Mode
    268
  - Example of Sort Mode Operation
    269
  - Bin Drive Mechanism
    270
  - Bins
    271
  - Exit Rollers
    272
  - Electrical Control
    273
- Specifications
  265
- Electricalcontrol
  273
  - Sorter Installation
    274
    
    Accessory Check
    274
  - Replacement and Adjustment
    277
    
    Exit Roller and O-Ring Replacement
    277
    
    Paper Sensor Replacement
    279
    
    Timing Belt Tension Adjustment
    280
  - Sorter Control Board Schematic
    281
Section 9

283
- Large Capacity Tray
  284
- Specifications
  284
- Mechanicalcomponent Layout
  285
- Electricalcomponent Layout
  286
- Mechanicaloperation
  287
  - Drive Mechanism
    287
  - Pick-Up Roller Mechanism
    288
  - Paper Size Detection
    289
- Electricaloperation
  290
  - Up Operation
    290
- Large Capacity Tray Installation
  291
  - Accessory Check
    291
- Replacementand Adjustment
  295
  - Tray Wire Replacement
    295
  - Traydown Sensor and Positioning Switch Replacement
    297
  - Paper Size Sensor Replacement
    299
  - Side Registration Adjustment
    300
    
    Unpacking and Installation
    303
    
    Troubleshooting
    312
Section 11

313
- Copy Quality
  315
- Hollowing out
  319
- Lines 80 MM Apart
  319
- Straight Sharp Lines
  320
- Fuzzy Lines or Bands
  321
- Uneven Density
  321
  - Uneven Density Appears Ln Bands
    322
- Abnormal Image Density
  323
- Vertical Black Lines Orbands
  323
  - Wavy Lines
    323
  - 2; Dotted Linesorbands
    324
  - Straight Linesorbands
    325
  - Lines at Irregular Intervals
    326
- Black Spots Atthe Leading Edge
  326
- Dirty Background
  327
- Blank Copy
  329
- Light Copy
  330
- Multifeed and Misdeed
  331
- Paper Creasing
  331
- Exposure Lamp Malfunction
  332
- Service Call Conditions
  332
- Scanner Home Position Sensor Noton
  333
- No Registration Start Signal
  334
- No Scanner Home Position Signal
  334
- Lens Home Position Sensor Not off
  335
- Lens Home Position Sensor Not on
  335
- 2Nd Scanner Home Position Sensornoton
  336
- 2Ndscannerhome Position Sensor Notoff
  336
- Scanner Motor too Slow
  
  337
  - Drum Thermistor
    337
  - Scanner Motor too Fast
    337
- Image Density Sensor
  
  338
- Fusing Thermistor Abnormal
  
  338
- Fusing Warm-Up Failure
  
  339
- Fusing Overheat
  
  339
- Fusing Temperaturetoo Low
  
  340
  - Pulse Generator Abnormal
    340
- OPTICS Emain COMMUNICATION FAILURE
  
  341
  - Total Counter Malfunction
    341
- Ldsensor ABNORMAL (Nosc Number)
  
  342
  - Defective Sensor Table
    343

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