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Ricoh K-C3 User Manual
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B245/B276/B277/B268/B269 Se
rvice Manual
18-Jan-06
94
Image Density Sensor
1.
Open the right door
.
2.
Plastic cover [A]
3.
Image transfer roller (
Previous
procedure)
4.
Push down on the notch [B] to free the sensor
.
5.
Image density sensor [C] (
x
1)
102
104
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
14
Copier Installation
15
Power Sockets for Peripherals
15
Accessory Check
15
Installation Procedure
16
B245/B276/B277/B268/B269 Service Manual 18-Jan
20
Platen Cover Installation
20
Accessory Check
20
Installation Procedure
20
ARDF Installation
21
Accessory Check
21
Installation Procedure
22
ADF Installation
25
Accessory Check
25
Installation Procedure
26
Two-Tray Paper Tray Unit Installation
29
Accessory Check
29
Installation Procedure
29
One-Tray Paper Tray Unit Installation
34
Accessory Check
34
Installation Procedure
34
One-Bin Tray Installation
38
Accessory Check
38
Installation Procedure
38
Anti-Condensation Heater Installation
41
Tray Heaters
42
Upper Tray Heater
42
Lower Tray Heater (Two-Tray Model Only)
44
Tray Heaters for the Optional Paper Feed Units
45
Key Counter Installation
49
GDI Expansion
52
Accessory Check
52
Installing Expansion Component
52
Installing Panels and Keys
54
Preventive Maintenance
55
PM Tables
55
How to Reset the PM Counter
58
Replacement and Adjustment
60
General Cautions
60
PCU (Photoconductor Unit)
60
Transfer Roller
60
Scanner Unit
60
Laser Unit
61
Fusing Unit
61
Paper Feed
61
Special Tools and Lubricants
62
Exterior Covers & Operation Panel
63
Rear Cover
63
Rear Lower Cover (Two-Tray Models Only)
63
Copy Tray
64
Upper Covers
64
Left Cover
65
Front Cover
65
Front Right Cover
66
Right Rear Cover
66
Right Door (Duplex Unit (B269/B277))
67
By-Pass Tray
67
Left Lower Cover (Two-Tray Models Only)
68
Right Lower Cover (Two-Tray Models Only)
68
Platen Cover Sensor
69
Scanner Unit
70
Exposure Glass/Df Exposure Glass
70
Lens Block
71
Lamp Stabilizer Board and Exposure Lamp
72
Original Width/Length Sensor
72
Scanner Motor
74
Scanner Home Position Sensor
75
Adjusting Scanner Positions
76
Laser Unit
80
Location of Caution Decal
80
Toner Shield Glass
80
Laser Unit
81
LD Unit
82
Polygonal Mirror Motor
82
Laser Unit Alignment Adjustment
83
PCU Section
85
Pcu
85
Pick-Off Pawls and Toner Density Sensor
86
OPC Drum
87
Charge Roller and Cleaning Brush
88
Cleaning Blade
88
Developer
89
After Replacement or Adjustment
90
Toner Supply Motor
91
Paper Feed Section
92
Paper Feed Roller
92
Friction Pad
93
Paper End Sensor
93
Exit Sensor
94
By-Pass Feed Roller and Paper End Sensor
95
Registration Roller
96
By-Pass Paper Size Switch
97
Registration Clutch
98
Registration Sensor
98
Upper Paper Feed Clutch and By-Pass Feed Clutch
99
Relay Clutch
99
Relay Sensor
100
Lower Paper Feed Clutch (Two-Tray Models Only)
100
Vertical Transport Sensor (Two-Tray Models Only)
101
Paper Size Switch
101
Image Transfer
102
Image Transfer Roller
102
Image Density Sensor
103
Fusing
104
Fusing Unit
104
Thermistor
104
Fusing Lamps
105
Hot Roller Stripper Pawls
106
Hot Roller
106
Thermostat
107
Pressure Roller and Bushings
107
NIP Band Width Adjustment
108
Cleaning Roller
109
Duplex Unit (Duplex Models B269/B277 Only)
110
Duplex Exit Sensor
110
Duplex Entrance Sensor
110
Duplex Inverter Sensor
111
Duplex Transport Motor
111
Duplex Inverter Motor
112
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
115
PSU (Power Supply Unit)
116
Gearbox
117
Copy Adjustments Printing/Scanning
120
Printing
120
Scanning
122
ADF Image Adjustment
123
Troubleshooting
125
Service Call Conditions
125
Summary
125
SC Code Descriptions
126
Electrical Component Defects
142
Sensors
142
Switches
144
Blown Fuse Conditions
146
LED Display
147
Bicu
147
Service Tables
148
Service Program Mode
148
Enter the Service Program Mode
148
How to Enter the SP Mode
148
SP Mode Tables
150
SP1-XXX (Feed)
150
SP2-XXX (Drum)
153
SP4-XXX (Scanner)
159
SP5-XXX (Mode)
165
SP6-XXX (Peripherals)
168
SP7-XXX (Data Log)
170
SP8-XXX (History)
174
SP9-XXX (Etc.)
179
Using SP Modes
180
Adjusting Registration and Magnification
180
ID Sensor Error Analysis (SP 2221)
181
Display APS Data (SP 4301 1)
182
Memory Clear
183
Input Check (SP 5803)
185
Output Check (SP 5804)
188
Serial Number Input (SP 5811)
190
NVRAM Data Upload/Download (SP 5824/5825)
190
Firmware Update Procedure
192
Test Pattern Print (SP 5902 1)
196
Paper Jam Counters (SP 7504)
198
SMC Print (SP 5990)
199
Original Jam History Display (SP 7508)
199
ADF APS Sensor Output Display (SP 6901)
200
Detailed Section Descriptions
202
Overview
202
Component Layout
202
Paper Path
203
Drive Layout
204
Board Structure
205
Block Diagram
205
BICU (Base Engine and Image Control Unit)
206
SBU (Sensor Board Unit)
206
Copy Process Overview
207
Scanning
209
Overview
209
Scanner Drive
210
Original Size Detection in Platen Mode
211
Image Processing
214
Overview
214
SBU (Sensor Board Unit)
215
IPU (Image Processing Unit)
216
Video Control Unit (VCU)
227
Laser Exposure
228
Overview
228
Auto Power Control (APC)
229
LD Safety Switch
230
Photoconductor Unit (PCU)
231
Overview
231
Drive
232
Drum Charge
233
Overview
233
Charge Roller Voltage Correction
234
ID Sensor Pattern Production Timing
235
Drum Charge Roller Cleaning
235
Development
236
Overview
236
Drive
237
Developer Mixing
237
B245/B276/B277/B268/B269 Service Manual 18-Jan
237
Development Bias
238
Toner Supply
239
Toner Supply Mechanism
240
Toner Density Control
240
Toner Supply in Abnormal Sensor Conditions
244
Toner Near End/End Detection and Recovery
245
Drum Cleaning and Toner Recycling
247
Drum Cleaning
247
Toner Recycling
248
Paper Feed
249
Overview
249
Paper Feed Drive Mechanism
250
Paper Feed and Separation Mechanism
250
Paper Lift Mechanism
251
Paper End Detection
251
Paper Size Detection
252
Side Fences
254
Paper Registration
254
Image Transfer and Paper Separation
256
Overview
256
Image Transfer Current Timing
257
Transfer Roller Cleaning
258
Paper Separation Mechanism
259
Image Fusing and Paper Exit
260
Overview
260
Fusing Unit Drive and Release Mechanism
261
Fusing Entrance Guide Shift
262
Pressure Roller
263
Fusing Temperature Control
263
Overheat Protection
265
Duplex Unit
267
Overall
267
Drive Mechanism
268
Basic Operation
268
Feed in and Exit Mechanism
271
Energy Saver Modes of Basic Machines
272
Overview
272
Aof
273
Timers
273
Recovery
273
Energy Saver Modes of GDI Machines
274
Overview
274
Aof
275
Timers
275
Recovery
275
Specifications
276
General Specifications
276
Supported Paper Sizes
280
Original Size Detection
280
Paper Feed and Exit
282
Machine Configuration
285
Optional Equipment
287
Ardf
287
Adf
287
One-Tray Paper Tray Unit
288
Two-Tray Paper Tray Unit
289
One-Bin Tray
289
4
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Ricoh K-C3 Specifications
General
Brand
Ricoh
Model
K-C3
Category
All in One Printer
Language
English
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