Ricoh Nashuatec 3715 - SECTION 7 TROUBLESHOOTING

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SECTION 7

TROUBLESHOOTING

Main Page

Overall Machine Information2
Specifications3
Copy Process Around the Drum6
Mechanical Component Layout8
Drive Layout9
Paper Path10
Electrical Component Descriptions11
Detailed Descriptions14
Opc Drum Characteristics15
Drive Mechanism16
Charge Corona Wire Cleaner Mechanism18
Charge Corona Circuit19
Scanner Drive21
Lens Drive22
4Th/5Th Mirror Drive23
Automatic Image Density Sensor24
Exposure Lamp Voltage Control25
Lead Edge Erase30
Side Erase30
Trailing Edge Erase31
Cross-Mixing34
Development Bias for Image Density Control35
Development Bias Circuit38
Toner Supply39
Toner Bottle Replenishment Mechanism39
Toner Supply Mechanism40
Toner Density Detection Mechanism41
Td Sensor Check and Toner Supply Timing42
Toner Supply Control43
Toner End47
Image Transfer and Paper Separation49
Transfer Corona and Discharge Plate Circuit50
Drum Cleaning51
Toner Recycling Mechanism52
Paper Feed and Registration54
Paper Tray Feed55
By-Pass Feed57
Paper Registration59
Side Fence Double Stopper Mechanism60
Paper End Detection61
Paper Feed and Misfeed Detection Timing62
Image Fusing64
Fusing Drive Mechanism65
Fusing Lamp Control66
Fusing Lamp Control Circuit68
Installation71
Installation Requirements72
Machine Level72
Minimum Space Requirements73
Accessory Check74
Installation Procedure75
Document Feeder (A662)79
Tray Heater Installation (Option)89
Service Tables90
Service Remarks91
General Cautions91
Imaging Unit91
Transfer Corona93
Fusing Unit93
Program Modes96
Basic Operation96
Sp Mode Quick Reference Table98
Up Mode and Sp Mode Cross Reference Table99
Service Program Mode Table100
Clear All Memory Procedure114
Practical Sp Mode Use Table116
TEST POINTS (Main Control Board)117
Variable Resistors117
Preventive Maintenance118
Preventive Maintenance Schedule119
Regular Pm Procedure122
Special Tools and Lubricants125
Replacement and Adjustment126
Exterior and Inner Covers127
Exterior Cover Removal127
Inner Cover Removal130
Exposure Glass Removal131
1St Scanner/Exposure Lamp Removal132
Scanner Belt Removal134
1St and 2Nd Scanner Position Adjustment135
Scanner Drive Motor Removal136
Lens Drive Motor Removal137
4Th/5Th Mirror Drive Motor Removal138
2Nd Mirror Replacement139
3Rd Mirror Replacement140
4Th and 5Th Mirror Replacement141
Ads Sensor Replacement143
Around the Drum144
Imaging Unit Removal and Toner Bottle Removal144
Charge Corona Wire and Charge Corona Grid Replacement145
Cleaning Blade Replacement146
Drum Replacement147
Toner Collection Coil and Toner Recycling Belt Replacement148
Developer Replacement149
Replacement the Toner Density Sensor (Td Sensor)150
Agitator Replacement151
Toner Supply Motor Ass'y Replacement152
Erase Lamp Replacement153
Quenching Lamp Replacement154
Paper Feed155
Paper Tray Removal155
Tray Feed Roller Replacement156
Tray Paper Feed Roller Adjustment157
By-Pass Feed Roller and Friction Pad Replacement158
By-Pass Paper Feed Clutch, High Voltage Supply Board, and Registration Clutch Replacement160
Right Vertical Guide Switch Replacement161
Relay Roller Clutch and Paper Feed Clutch Replacement162
Paper Size Switch Replacement163
By-Pass Paper End Sensor and Registration Sensor Replacement164
Fusing Unit Removal165
Hot Roller Replacement166
Pressure Roller Replacement167
Hot Roller Stripper Replacement168
Fusing Entrance Guide Adjustment169
Fusing Pressure Adjustment170
Transfer Corona Wire Replacement171
Discharge Plate Replacement172
Ozone Filter Replacement173
Main Control Board Replacement174
Copy Quality Adjustment175
Light Intensity Adjustment176
Development Bias Voltage Adjustment178
Toner Density Adjustment180
Toner Supply Ratio Selection180
Grid Voltage Adjustment181
Transfer Current Adjustment182
Charge Current Adjustment183
Horizontal Magnification Adjustment184
Vertical Magnification Adjustment184
Focus Adjustment185
Leading Edge Erase Margin Adjustment185
Registration Adjustment185
4Th/5Th Mirror Height Adjustment186
ADS (Auto Image Density Sensor) ADJUSTMENT187
Side-To -Side Registration Adjustment188
Troubleshooting190
Copy Quality191
Blank Copy (White Copy)191
Dirty Background193
Uneven Image Density195
Vertical Black Bands196
Vertical Black Lines197
Vertical White Lines or Bands-1 (Dull or Blurred)198
Vertical White Lines or Bands-2 (Thin, Distinct)199
Horizontal Black/White Lines200
Black Spots on the Copy Image202
Skewed (Optical) Copy Image203
Toner Density on Copies too High204
Toner Density on Copies too Low206
Unfused Copy Image208
Creasing Paper after Fusing209
Paper Misfeed210
Abnormal Condition in Toner Density Detection211
Service Call Conditions213
Electrical Component Defects219
Blown Fuse Conditions221
User Codes221

Ricoh Nashuatec 3715 - SECTION 7 TROUBLESHOOTING

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