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DCP-8157DN
Brother DCP-8157DN User Manual
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3-15
Confidential
5
T
oner LED PCB ASSY/Main fan
6
Laser unit
Harness colors may be chang
ed for any reason.
Toner LED
PCB ASSY
Hook
Toner LED harness (RD, BL, WH)
Hooks
Main fan harness (RD, WH)
Main fan
Hook
Laser unit flat cable
Core
Laser unit
Hooks
Toner LED harness (RD, BL, WH)
160
162
Table of Contents
Table of Contents
5
Default Chapter
1
Service Manual
1
Function Comparative Table
2
Chapter 3 Disassembly/Reassembly
7
Chapter 4 Adjusting and Updating Settings
9
Periodical Maintenance
11
Chapter 7 Periodical Maintenance
11
Regulation
12
Disconnect Device
13
Safety Information
18
Additional Information
23
Unlawful Use of Copying Equipment
24
Chapter 1 Specifications
27
Specifications List
29
General
29
Computer Requirements
33
Network Connectivity
34
Service Information
35
Supplies
36
Paper
38
Paper Handling
38
Media Specifications
39
Type and Size of Paper
39
Printable & Scannable Area
40
Telephone
40
Copy
41
FAX (Only for the Models with FAX Function)
41
Scanner
42
USB Direct Interface
42
Chapter 2 Troubleshooting
43
Table of Contents
45
Introduction
46
Precautions
46
Checks before Commencing Troubleshooting
47
Overview
49
Cross-Section Drawing
49
Printer Part
49
ADF Unit/Document Scanner Unit
50
Paper Feeding
52
Printer Part
52
Scanning
53
Operation of each Part
54
Block Diagram
56
Main Components
57
Life of Toner Cartridge and Drum Unit
58
Error Indications
63
Error Codes
63
Error Messages
69
Communication Errors
73
Error Cause and Remedy
76
Cartridge Error
105
Troubleshooting for Paper Feeding Problems
114
Multiple Sheets of Paper Are Fed
114
Paper Becomes Wrinkled
114
Paper Is Fed at an Angle
114
Only Single Surface Is Printed in Duplex Printing Mode
115
Paper Is Curled
115
Image Defect Examples
116
Troubleshooting According to Image Defect
117
Faulty Registration
119
Poor Fixing
120
Image Distortion
121
Vertical Streaks
122
Faint Print
126
White Spots
127
Black Spots
128
Troubleshooting for Software Problems
130
Cannot Print Data
130
Troubleshooting for Network Problems
131
Cannot Print Via Network Connection
131
Troubleshooting for Control Panel Problems
132
Control Panel Is Inoperable
132
Nothing Is Displayed on the Lcd
132
Troubleshooting for Toner and Drum Problems
133
Cartridge Error (Toner Cartridge Cannot be Detected)
133
Drum Error
133
Troubleshooting for Fuser Unit Problems
134
Fuser Unit Failure
134
Troubleshooting for Laser Unit Problems
135
Laser Unit Failure
135
Troubleshooting for Pcb Problems
136
Troubleshooting for Document Feeding Problems
137
Document Becomes Wrinkled
137
Defect Examples
138
Troubleshooting for Fax Problems
141
Bell Does Not Sound
141
Communication Error Occurs
141
Fax Cannot be Received
141
Fax Cannot be Sent
141
Troubleshooting for Other Problems
142
Disassembly/Reassembly
144
Safety Precautions
147
Packing
148
Screw Catalogue
149
Screw Torque List
150
Lubrication
153
Overview of Gears
156
Harness Routing
158
Disassembly Flow Chart
166
Disassembly Procedure
168
Preparation
168
Paper Tray 1
169
Back Cover / Outer Chute
171
Fuser Cover
172
MP Cover ASSY
173
Front Cover ASSY
174
Side Cover L / Access Cover
175
Side Cover R ASSY
176
ADF Unit
177
Hinge ASSY L
179
Hinge R
179
ADF Cover ASSY
180
ADF Document Output Support Flap
180
Document Sub Tray
180
Gear Cover
182
Document Separate Roller ASSY
183
ADF Separation Pad Spring / ADF Separation Pad
184
Second Side CIS Flat Cable (Duplex Scanning Models Only)
188
Second Side CIS Unit
188
Upper ADF Chute
189
ADF Cover/Document Detection Sensor PCB ASSY / First Side Document Scanning Position Sensor PCB ASSY / Second Side Document Scanning Position Sensor PCB ASSY (Duplex Scanning Models Only)
191
Drive Frame Assy / Document Feed Roller Assy
193
ADF Motor ASSY
198
First Side Document Hold
198
Panel Cover / Printed Panel Cover
199
Document Scanner Unit
206
First Side CIS Unit
208
Joint Cover
213
USB Host PCB ASSY
214
Wireless LAN PCB ASSY
214
Speaker Unit
215
Ncu Pcb Assy
216
Main PCB ASSY
217
Fuser Unit
219
Laser Unit
222
Low-Voltage Power Supply PCB ASSY
223
Toner LED PCB ASSY
226
Main Fan
228
Air Duct / Filter
230
Relay Front PCB ASSY
231
Registration Clutch / T1 Clutch
232
Main Frame L ASSY
233
Main Motor ASSY
235
Develop Joint Gear 37 / Develop Joint
237
LT Drive Gear 29
238
Toner Sensor PCB ASSY
239
MP Solenoid
240
Develop Clutch 51R / Develop One Way Clutch 53
241
New Toner Actuator
242
Internal Temperature Thermistor
243
Fuser Drive Gear 39
244
Duplex Solenoid
246
Back Cover Sensor
247
LT Connector (T1)
248
T1 Roller Holder ASSY
249
High-Voltage Power Supply PCB ASSY
250
Eject Sensor PCB ASSY
253
MP Roller Holder ASSY / MP Separation Pad ASSY / MP Separation Pad Spring
254
T1 Paper Feed Sensor PCB ASSY
256
MP Paper Empty Sensor PCB ASSY / MP Paper Empty Actuator 1 / MP Paper Empty Actuator 2
257
Registration Front/Rear Sensor PCB ASSY / Registration Front Actuator
260
Registration Rear Actuator / Registration Actuator Spring
260
Disassembly Procedure (Lt Unit)
263
Paper Tray 2
263
T2 Roller Holder ASSY
265
T2 Side Cover L
266
T2 Side Cover R
267
T2 Front Cover ASSY
268
T2 Relay PCB ASSY
269
T2 Clutch
270
T2 Paper Feed Sensor Pcb Assy
271
T2 Paper Feed Sensor PCB ASSY
274
T2 Back Cover
275
LT Connector ASSY (T2)
276
Adjusting and Updating Settings as Required after Parts Replacement
278
As Required after Parts Replacement
278
If You Replace the Main Pcb Assy
279
Installing Firmware
280
Checking Firmware Version
280
Installing Firmware Using USB Flash Memory
280
Installing Firmware Using PC
281
Setting by Country
281
Initializing the EEPROM of the Main PCB ASSY
281
Setting Serial Number and Entering Adjusted Value of Laser Unit
282
Acquiring White Level Data
283
Adjusting Touch Panel (Touch Panel Models Only)
283
If You Replace the Laser Unit
284
Entering Adjusted Value of Laser Unit
284
If You Replace the Low-Voltage Power Supply Pcb Assy
286
Resetting Irregular Power Supply Detection Counter
286
If You Replace the High-Voltage Power Supply Pcb Assy
287
Initializing Pre-Discharge Detection Parameters
287
If You Replace any Periodic Replacement Parts
288
If You Replace the Control Panel Assy or Touch Panel Assy
289
Installing Firmware (Touch Panel Models Only)
289
Checking Firmware Version
289
Installing Firmware Using PC
290
Installing Firmware Using USB Flash Memory
290
Adjusting Touch Panel (Touch Panel Models Only)
291
Checking LCD Operation
291
Checking Control Panel Operation
291
If You Replace the Document Scanner Unit
292
Acquiring White Level Data (Function Code: 55)
292
Service Functions
293
Service Functions
294
Chapter 5 Service Functions
294
Maintenance Mode
296
How to Enter Maintenance Mode
296
Method of Entering End-User Accessible Maintenance Mode
296
Method of Entering Maintenance Mode for Service Personnel
296
List of Maintenance Mode Functions
297
Details of Maintenance Mode Functions
298
Initialize EEPROM Parameters (Function Code: 01, 91)
298
Operation Procedure
299
Print White Level/Black Level Data for Document Scanning Compensation (Function Code: 05)
299
ADF Performance Test (Function Code: 08)
301
Move CIS Unit to Transportation Position (Function Code: 06)
301
Print Test Pattern (Function Code: 09)
302
(Function Code: 10, 11)
303
Set Worker Switches (WSW) and Print Worker Switch Setting Data
303
Check LCD Operation (Function Code: 12)
307
Check Control Panel Button Operation (Function Code: 13)
308
Display Software Version (Function Code: 25)
310
Check Sensor Operation (Function Code: 32)
311
Display LAN Connection Status (Function Code: 33)
313
Set PC Print Functions (Function Code: 43)
314
Setting Functions
314
Change USB No. Return Value / Adjust Left-End Print Start Position on Second Side When Duplex Printing / Change ON/OFF Setting for Deep Sleep Function (Function Code: 45)
317
Set Country/Language (Function Code: 52)
319
Transfer Received Fax Data/Log Information (Function Code: 53)
320
Acquire White Level Data and Set CIS Scan Area (Function Code: 55)
322
Fine-Tune Scanning Position (Function Code: 54)
322
Adjust Touch Panel (Function Code: 61)
323
Continuous Print Test (Function Code: 67)
324
Print Frame Pattern (Single-Side Printing) (Function Code: 69)
326
Print Frame Pattern (Duplex Printing) (Function Code: 70)
328
Print Solid Pattern (Function Code: 71)
329
Setting by Country (Function Code: 74)
330
Print Maintenance Information (Function Code: 77)
333
Check Fan Operation (Function Code: 78)
335
Display Machine Error Code (Function Code: 82)
339
Reset Counters for Periodic Replacement Parts (Function Code: 88)
339
Send Communication Log Information to Telephone Line
339
Quit Maintenance Mode (Function Code: 99)
340
Other Service Functions
341
Change ON/OFF Setting for Deep Sleep Mode
341
Change ON/OFF Setting for Sleep Mode
342
Reset Periodic Replacement Parts
343
Reset Developer Roller Counter
344
Display ROM Version
345
Perform Demo Printing
345
CHAPTER 6 Wiring Diagram
346
Periodical Maintenance
349
Safety Precautions
351
Periodical Replacement Parts
352
Preparation
352
Fuser Unit
354
Laser Unit
357
MP Paper Feeding Kit
363
Paper Feeding Kit
364
Appendix 1 Serial Numbering System
369
Appendix 2 Deleting User Setting Information
371
Appendix 3 Installing Maintenance Driver
373
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Brother DCP-8157DN Specifications
General
Brand
Brother
Model
DCP-8157DN
Category
Printer
Language
English
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