Ricoh FT7770 Manuals

Manuals and User Guides for Ricoh FT7770. We have 1 Ricoh FT7770 manual available for free PDF download: Service Manual

Ricoh FT7770 Service Manual

Ricoh FT7770 Service Manual (1024 pages)

Copier

Brand: Ricoh | Category: Copier | Size: 27.12 MB

Table of Contents

Ricoh Ft7770

2
- Table of Contents
  2
Table of Contents

12
- Overall Machine Information
  
  17
  - Main Specifications
    18
  - Guide to Components
    22
    
    Copier Interior
    26
    
    Operation Panel
    28
    
    How to Use the Guidance Display
    32
    
    Display Control Keys
    33
    
    Paper Path
    36
    
    Mechanical Component Layout
    38
    
    Electrical Component Layout
    39
    
    Drive Layout
    43
    
    Electrical Component Descriptions
    44
    
    Overall Machine Control
    51
    
    Ac and DC Power Distribution
    52
- Detailed Section Description
  
  53
  - Drum
    54
    
    Selenium Drum Drum Thermistor Unit Drum Heater Circuit
    54
  - Charge
    54
    
    Corona Unit
    54
    
    Corona Unit Ventilation
    54
    
    Wire Cleaner
    54
    
    Charge Power Pack
    54
  - Erase
    54
    
    Introduction
    54
    
    Side Erase and Leading/Trailing Edge Erase Erase Lamp Circuit
    54
Table of Contents

55
- Introduction
  64
- Introduction
  67
- Exposure Lamp Unit
  68
- Automatic Image Density Sensing
  69
- Lamp Regulator
  70
- Anticondensation Heater
  72
- Optics Cooling Fan
  72
- Introduction
  73
- Scanner Motor Control
  74
- Lens Positioning
  76
- Second Scanner Shift
  78
- Lens/Mirror Position Initialization
  79
  - Introduction
    80
  - Drive Mechanism
    82
- Cross Mixing
  83
- Knocking Solenoid
  84
- Toner Density Control
  85
- Image Density Control
  89
- Bias for ID Sensing
  93
- Bias Circuit
  94
- Development Drive Motor
  96
- Image Transfer
  98
- Paper Separation
  99
  - TC/SC Wire Cleaner
    100
- Pick-Off Pawls
  101
- PTC Power Pack and PTL Stabilizer
  102
  - Introduction
    105
  - Drive Mechanism
    106
  - Cleaning Blade Pressure Mechanism
    107
  - Used Toner Removal
    109
  - Cleaning Solenoid Circuit
    111
  - PCC Power Pack
    112
  - Cleaning Bias Power Pack
    113
  - Introduction
    114
  - Pre-Quenching Corona Circuit
    115
  - Quenching Lamp Circuit
    116
- Paper Feed
  117
  - Introduction
    117
  - Feed Unit Mechanism
    118
  - Paper Tray Drive Mechanism
    120
  - Friction Roller Reverse Mechanism
    121
  - Paper Volume Detection
    122
  - Guide Posts and Paper Size Detection
    123
  - Tray Lock and Positioning
    124
  - Paper Size Board
    125
  - Tray Motor Circuit "2-71
    127
  - Paper Tray Heaters
    128
  - Tray Set Detection
    129
- Vertical Transport and Registration
  130
  - Introduction
    130
  - Drive Mechanism
    132
  - Jam Check Timing
    134
- Paper Transport
  135
  - Introduction
    135
  - Vacuum Fan Circuit
    136
  - Introduction
    137
  - Pressure Mechanism
    138
  - Oil Supply
    139
  - Oil End Sensor
    140
- Drive Mechanism
  141
  - Fusing Lamp Circuit
    142
  - Introduction
    144
  - Operation
    145
  - Inverter Rollers
    147
  - Inversion
    148
  - Junction Gate
    149
- Duplex Tray
  
  150
  - Introduction
    150
  - Drive Mechanism
    151
  - Fork Gate
    152
    
    Paper Positioning
    153
  - Bottom Plate Mechanism
    154
    
    Duplex Paper Feed
    155
  - Duplex Motor Circuit
    156
- Top Unit
  
  157
  - Release Mechanism
    157
  - Drum Support
    158
- Other Circuits
  
  159
  - Counters
    159
  - Photosensor
    161
  - Photointerrupters
    162
  - Solenoids
    163
  - Magnetic Clutches
    164
  - Monitor Board
    165
  - Operation Panel
    166
  - AC Drive Board
    167
  - Ozone Fan
    168
    
    Corona Cleaner
    169
Section 3

171
- Environment
  172
- Minimum Space Requirement
  173
- Machine Level
  174
- Power Source
  174
- Unpacking
  175
- Accessory Check
  176
- Installation Procedure
  176
- Installation Procedure
  177
- Key Counter Holder Installation
  186
- A3/11" X 17" COUNTER INSTALLATION
  187
- MODIFYING MAIN TRANSFORMER VOLTAGE (220V to 240 V)
  188
- Preparation for Transporting the Copier
  189
- Pm Table
  193
- Lubrication Parts
  200
  - Service Tables
    203
  - Test Points
    203
  - Dip Switches
    204
  - Service Remarks
    205
- Special Tools and Lubricants
  210
Section 5

212
- Exterior Compoment Removal
  
  214
  - Exposure Glass and Operation Panel Removal
    214
  - Top Plate Removal
    215
- Drum and Charge
  
  216
  - Drum Replacement
    216
  - Drum Thermoswitch and Heater Replacement
    217
  - Charge Corona Wire and Cleaner Pad Replacement
    218
  - Scanner Drive Wire Replacement
    219
  - Lens Drive Wire Replacement
    229
  - Exposure Lamp Unit Removal
    233
  - Development Unit Removal
    234
  - Developer Replacement
    235
  - Development Roller and Paddle Roller Removal
    236
  - Adjustment of Development Roller Gaps
    238
  - Image Density Sensor Cleaning and Removal
    240
  - Image Density Sensor Adjustment
    241
- Transfer and Pick-Off
  
  242
  - Transport Unit Removal
    242
  - Transfer Ozone Filter Replacement
    243
    
    Pre-Transfer Corona Wire Replacement
    244
    
    Transfer/Separation Corona Wire and Cleaner Pad Replacement
    245
    
    Transport Belt Replacement
    246
  - Registration Sensor Replacement
    247
    
    Cleaning Blade and Brush Replacement
    249
    
    Pre-Cleaning Corona Wire Replacement
    250
    
    Toner Collection Coil Replacement
    251
    
    Cleaning Blade Pressure Adjustment
    252
    
    Blade Cleaner and Bias Roller Blade Replacement
    253
    
    Pre-Quenching Corona Wire Replacement
    254
  - Hot Roller Stripper Replacement
    256
  - And Oil Supply Pad Replacement
    257
  - Hot Roller Replacement
    259
    
    Pressure Roller Replacement
    261
    
    Thermistor and Thermofuse Replacement
    262
    
    Fusing Pressure Adjustment
    263
    
    Hot Roller Temperature Adjustment
    265
  - And Adjustment
    266
  - Fusing Unit Removal
    266
  - Return Pinch Roller Solenoid Adjustment
    268
  - Inverter Gate Solenoid Adjustment
    269
- Paper Feed
  
  270
  - Paper Feed Unit Removal
    270
  - Pick-Up Roller Replacement
    271
  - Feed Roller Replacement
    272
  - Friction Roller Replacement
    273
    
    Paper Tray Unit and Cover Removal
    274
    
    Paper Tray Drive Wire Replacement
    275
    
    Vertical Transport Unit Removal
    278
- Duplex Tray
  
  279
  - Duplex Tray Removal
    279
  - Paper Feed Roller Replacement and Adjustment
    280
  - Pick-Up Roller Replacement
    281
  - Friction Roller Replacement
    282
  - Bottom Plate Pressure Clutch Disassembly
    283
  - Duplex Paper Sensor Adjustment
    284
  - Duplex Side Plate Drive Wire Replacement
    285
- Copy Image
  
  286
  - Horizontal Magnification Adjustment
    286
  - Side-To-Side Registration Adjustment
    287
  - Uneven Exposure Adjustment
    288
  - Light Intensity Adjustment
    289
  - Auto Density Sensor Adjustment
    290
- Corona Current Adjustment
  
  291
- Corona Current Adjustment Preparation
  
  291
  - Charge Corona
    293
  - Pre-Transfer Corona
    294
  - Transfer Corona
    295
  - Separation Corona
    296
  - Pre-Cleaning Corona
    297
  - Pre-Quenching Corona
    298
- Service Program Mode
  
  299
  - Factory Settings
    299
  - How to Access SP41 to SP53
    300
  - Service Program Functions
    301
  - Main Baord Schematic 1
    315
Section 7

318
- Mechanical Component Layout
  318
- Main Baord Schematic 2
  319
- Variable Resistors
  319
- Specifications
  320
- Mechanical Component Layout
  321
- Electrical Component Layout
  322
- Electrical Component Descriptions
  323
- Basic Operation
  324
  - Single-Sided Original Feed
    324
  - Two-Sided Original Feed
    326
- Feed-In Unit
  329
  - Original Feed-In
    329
  - Drive Mechanism
    331
  - Pressure Mylar Release
    333
  - Separation of Originals
    334
  - Relay Roller Pressure Release
    335
- Transport and Inversion Unit
  336
  - Original Transport
    336
  - Transport Belt Drive Mechanism
    337
  - Original Inversion and Feed-Out
    338
  - Inversion and Feed-Out Drive Mechanism
    339
  - Lift Mechanism
    341
- Computer Form Feed
  342
- Electrical Operation
  343
  - Interface with Copier
    343
  - Feed-In Sensor
    344
  - Motor Control
    345
  - Original Size Sensing
    346
  - DF Misfeed Check
    348
  - Application Switch
    349
  - Form Size Switch
    350
  - CFF Feed Hole and Set Sensors
    351
- Service Tables
  352
  - Test Point Table
    352
  - Variable Resistor Table
    352
  - LED Table
    353
  - DIP Switch Table
    353
    
    DIP Switch Table
    354
    
    Blown Fuse Table
    355
  - Switch Failure Table
    355
  - Sensor Failure Table
    356
- Replacement and Adjustment
  357
  - Separation Roller Replacement
    357
    
    Friction Tab Replacement
    358
- Pick-Up Roller Replacement
  359
  - Transport Unit Cover Removal
    362
  - Inverter Entrance and Inverter Registration Sensor Replacement
    364
  - Turn Roller Replacement
    365
  - Transport Unit Cover Removal
    366
  - Exit Roller/Pull-Out Roller Replacement
    366
  - Inverter Roller Replacement
    367
    
    DF Removal
    369
    
    Original Skew Adjustment
    370
- Feed-In, Belt, and Inverter Motor
  373
- Timing Chart 1
  374
- Timing Chart 2
  375
Section 8 Large Capacity Tray

377
- Specifications
  378
- Mechanical Component Layout
  379
- Electrical Component Layout
  380
- Electrical Component Descriptions
  381
- Mechanical Operation
  382
  - Basic Operation
    382
  - Feed Unit Mechanism
    383
  - Tray Drive Mechanism
    384
  - Friction Roller Reverse Mechanism
    385
  - Paper Volume Detection
    385
  - Guide Plate and Paper Size Detection
    386
  - Tray Lock and Positioning
    387
  - Tray Motor Circuit
    388
  - Paper Tray Heater
    389
  - Tray Set Detection
    389
  - Installation Procedure
    391
  - Pick-Up Roller Replacement
    396
  - Paper Feed Unit Removal
    397
  - Feed Roller Replacement
    397
  - Friction Roller Replacement
    398
  - Paper Tray Unit Removal
    399
  - Paper Tray Drive Wire Replacement
    400
Section 9

404
- Accessory Check
  404
- Specifications
  405
- Mechanical Component Layout
  406
- Electrical Component Layout
  407
- Sorter Drive
  408
- Electrical Component Descriptions
  410
- Mechanical Operation
  412
  - Basic Operation
    412
  - Transport Belt Mechanism
    414
  - Turn Gate
    415
  - Misfeed Clearance Release Mechanism
    416
  - Manual Feed
    417
  - Bin Gate Operation
    418
- Electrical Operation
  419
  - Interface with the Copier and AC Power
    419
  - Timing Exit, and Manual Feed Sensors
    420
  - Bin and Jam Sensors
    421
  - Bin and Turn Gate Solenoids
    422
  - Safety Switches
    423
  - Distribution Drive Clutch
    424
    
    Accessory Check
    425
    
    Installation Procedure
    426
  - Sorter Main Board
    428
- Sorter Main Board
  429
  - Sorter Interface Board
    430
- Replacement and Adjustment
  431
  - Distribution Unit Removal
    431
  - Transport Unit Removal
    433
  - Jam Sensor and bin Copy Sensor Adjustment
    437
  - Hz/60Hz Modification
    438
Section 10 Sorter Connecter Unit

440
- Specifications
  441
- Component Layout
  442
- Mechanical Operation
  442
- Electrical Operation
  443
  - Circuit
    443
  - Main Board
    443
  - DC Power Supply
    444
  - Sensor Input Circuit
    445
  - Accessory Check
    447
  - Installation Procedure
    448
- Replacement and Adjustment
  455
- Tension Adjustment
  455
- Hz/60Hz Modification (Sorter Connector Unit)
  456
- Drive Layout
  458
- Main Baord Schematic 3
  459
- Specifications
  460
- Mechanical Component Layout
  461
- Electrical Component Layout
  462
  - Drive Layout
    464
  - Electrical Component Descriptions
    466
- Overall Machine Control
  470
- Basic Operation
  471
- Transport Section
  472
- Turn Gate Section
  473
- Distribution Section
  474
  - Side Plate
    475
- Staple Unit
  477
- Safety Switch
  484
- Service Call Conditions
  486
- Accessory Check
  488
- Installation Procedure
  489
- Bin/Jam Sensor
  493
- DIP Switch Table
  493
  - Stapler Removal
    496
- LED Table
  493
- Test Point Table
  493
- Staple Positioning Adjustment
  496
- Gripper Assembly Removal
  497
- Gripper Solenoid Adjustment
  499
  - Side Plate Drive Belt Tension Adjustment
    501
  - Jam Sensor and bin Copy Sensor Adjustment
    503
- Timing Chart
  504
- Sorter Stapler Main Board Block Diagram
  505
Section 12

507
- Specifications
  508
- Overall Machine Control
  509
- Data Format
  510
- Basic Operation
  511
  - Job Sheet Reading
    511
  - Menu Reader Indicator Lights
    513
  - Processing Errors
    514
  - Accessory Check
    515
  - Installation Procedure
    516
- Replacement and Adjustment
  518
  - Lower Transport Roller Replacement
    518
- Horizontal White Lines (Bands)
  523
- Copy Quality
  526
- Jitter
  531
- Hollowing out
  532
- Vertical Black Lines (Bands)
  538
- Uneven Density
  540
- Black Spots
  542
- Dirty Background
  543
- Black Image
  546
- PAPER JAM/MISFEED Pick-Off Jam
  550
- Duplex Tray Jam
  551
- False Paper Jam
  551
- Paper Feed Jam
  553
- Registration Jam
  554
- Transport Unit Jam
  554
- Abnormal Indications
  556
- Please Wait Condition
  558
  - No Display
    559
  - Original Jam
    559
  - Abnormal Indication
    560
  - Others
    584
Section 14

588
- 1 Specifications
  
  589
- 2 Component Layout
  
  590
- 3 Mechanical Operation
  
  591
- 4 Electrical Operation
  
  592
- 5 Installation
  
  593
  - Accessory Check
    593
  - Installation Procedure
    594
    
    First Sorter/Staplerpreparation
    594
    
    Second Sorter/Stapler Preparation
    600
- 6 Replacement and Adjustment
  
  605
  - Tension Adjustment
    605
Section 15 Ricoh Ft7870

607
- Installation and Option Interchangeability
  607
- 1 SPECIFICATIONS (Compared with F21)
  
  609
- 2 GUIDE to COMPONENTS (Compared with F21)
  
  610
  - Operation Panel
    610
  - Electrical/Mechanical Component Layout
    611
  - Drive Layout
    612
- 3 SECTIONAL DESCRIPTIONS (Compared with F21)
  
  613
  - Process
    613
    
    Drum Current
    613
    
    Rest Time Compensation
    613
    
    Toner End Condition
    614
    
    Fusing Efficiency
    614
    
    Counter Measure for Toner Build up
    615
- 4 Installation and Option Interchangeability
  
  616
  - Installation
    616
- 5 SERVICE TABLE (Compared with F21)
  
  617
  - PM TABLE (Differences between F21 and F22)
    617
  - Variable Resistors
    617
  - Service Remarks
    618
- 6 Adjustments
  
  619
  - Image Density Sensor/Auto Density Sensor Adjustment
    619
  - Fusing Unit Adjustment
    619
  - How to Access the Sp Mode
    620
  - Additional Sp Modes
    620
  - Sp Mode Factory Settings
    621
  - Drum Current Adjustment
    621
- 7 Electrical Data
  
  623
  - Timing Chart
    623
  - Troubleshooting
    625
  - Service Codes
    625
  - How to Reset the Optics and Fusing Sc
    625
    
    Transport 1 (A)
    632
    
    Transport 2 (A)
    634
    
    Distribution (A)
    636
    
    Upper Solenoid Control Board (A)
    640
    
    Lower Solenoid Control Board (A)
    642
    
    Sorter Main Board (A)
    648
    
    Main Sensor Board (A)
    650
    
    Main Harness (A)
    654
    
    Power Supply Harness (A)
    656
    
    Door Switch Harness (A)
    658
    
    Top Unit Mechanism (A)
    690
    
    Optics 1 (A)
    692
    
    Optics 2 (A)
    694
    
    Optics 3 (A)
    696
    
    Lower Tray (A)
    700
    
    Tray Accuride (A)
    702
    
    Duplex Tray 1 (A)
    706
    
    Duplex Tray 3 (A)
    710
    
    Vertical Transport 1 (A)
    714
    
    Vertical Transport 2 (A)
    716
    
    Vertical Transport 3 (A)
    718
    
    Development 1 (A)
    720
    
    Development 2 (A)
    722
    
    Development 3 (A)
    724
    
    Transfer and Separation 1 (A)
    726
    
    Transfer and Separation 2 (A)
    728
    
    Drum Section 1 (A)
    730
    
    Drum Section 2 (A)
    732
    
    Cleaning Unit (A)
    734
    
    Fusing and Lnvertor 1 (A)
    736
    
    Electrical Section 1 (A)
    746
    
    Electrical Section 2 (A)
    748
    
    Electrical Section 3 (A)
    750
    
    Feed–In Unit 2–Df (A)
    756
    
    Transport Section 1–Df (A)
    758
    
    Scanner Motor Control Board (A)
    768
    
    Main Motor Control Pcb (A)
    770
    
    Ac Drive Unit (A)
    772
    
    Operation Control Board (A)
    776
    
    Key Board (A)
    778
    
    Rom Board (A)
    780
    
    Df Main Board (A)
    782
    
    Original Size Sensor Board (A)
    784
    
    DC Main Harness (A)
    788
    
    Monitor Harness (A)
    792
    
    Paper Feed Harness (A)
    794
    
    Tray Harness (A)
    796
    
    Duplex Unit Harness (A)
    798
    
    Transfer and Separation Harness (A)
    800
    
    Fusing Unit Harness (A)
    802
    
    Ac Power Relay Harness (A)
    812
    
    Harness Layout–Df (A)
    818
    
    Motor Harness (A)
    820
    
    Separation Harness (A)
    822
    
    And Power Supply Harnesses (A)
    828
    
    Parts Catalog
    942
    
    Transport (A)
    974
    
    Upper Distribution (A)
    976
    
    Lower Distribution (A)
    978
    
    Staple Unit (A)
    980
    
    Jogger (A)
    982
    
    Stapler Vertical Drive (A)
    984
    
    Gripper Harness (A)
    1002
  - Receiver Sensor Board, Light Sensor Board
    1006
    
    And Paper Size Sensor Harnesses (A)
    1006
    
    Noise Filter Harness (A)
    1008

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