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(2) Disconnect all harnesses and flat cables from the main PCB ASSY.

Fig. 3-51

Note:

• After disconnecting flat cables, check that each cable is not damaged at its end or

shortcircuited.

• When connecting flat cables, do not insert them at an angle. After insertion, check

that the cable is not at an angle.

Eject motor harness

Relay front harness

Toner amount detection sensor PCB harness (light emission)

Internal temperature sensor harness

Paper empty sensor harness

Laser unit flat cable

Low-voltage power supply harness

Paper feed motor harness

HVPS flat cable

LT/TT connector harness

External temperature/humidity

sensor harness

Back cover/duplex

tray sensor harness

MX connector harness

Erase lamp harness

Eject sensor harness

Touch panel models only

Models with 520-sheet T1 only

Models with 520-sheet T1 and

HL-5580D/5585D only

Panel flat cable

Default Chapter4
- Table of Contents4
Safety Information11
Chapter 1 Supplemental Specifications16
General16
Network Connectivity23
Service Information24
Supplies25
Chapter 2 Error Indications & Troubleshooting27
Introduction27
- Precautions27
- Checks before Commencing Troubleshooting28
Overview30
- Cross-Section Drawing30
- Paper Feeding31
- Operation of each Part32
- Block Diagram34
- Main Components35
Error Indications36
- Error Codes37
- Error Messages46
  - Non Touch Panel Models46
  - Touch Panel Models55
Troubleshooting68
- Error Cause and Remedy68
- Troubleshooting for Paper Feeding Problems110
- Troubleshooting for Image Defects124
  - Image Defect Examples124
  - Troubleshooting According to Image Defect125
- Troubleshooting for Software Problems137
  - Cannot Receive Data137
- Troubleshooting for Network Problems138
  - Cannot Print Via Network Connection138
  - Cannot Connect to Access Point138
- Troubleshooting for Control Panel Problems138
- Troubleshooting for Toner and Drum Problems140
- Troubleshooting for Fuser Unit Problems142
  - Fuser Unit Failure142
- Troubleshooting for Laser Unit Problems142
  - Laser Unit Failure142
- Troubleshooting for PCB Problems143
  - Main PCB Failure143
  - Memory Full143
- Troubleshooting for Other Problems144
Chapter 3 Disassembly/Reassembly146
Safety Precautions146
Packing147
Screw Catalogue150
Screw Torque List151
Lubrication157
Overview of Gears159
Harness Routing162
Disassembly Flow Chart178
- Machine178
Disassembly Procedure183
- Preparation183
- Paper Tray184
- Back Cover / Outer Chute186
- Fuser Cover187
- Fuser Unit188
- MP Cover ASSY191
- Front Cover ASSY193
- Side Cover L194
- Side Cover R195
- Top Cover ASSY196
  - Panel PCB ASSY196
  - Top Cover ASSY197
  - Nfc Pcb Assy198
  - Control Panel199
  - Stack Sensor PCB ASSY203
  - Top Cover Printed ASSY204
  - Top Cover ASSY205
  - Panel PCB ASSY206
  - Top Cover Printed ASSY207
- Main PCB ASSY / Wireless LAN PCB (Wireless LAN Models Only)208
- External Temperature/Humidity Sensor211
- Laser Unit212
- PF Roller Holder ASSY214
- Low-Voltage Power Supply PCB ASSY215
- Toner Amount Detection Sensor PCB ASSY (Light Emission)218
- Main Fan220
- Filter222
- Relay Front PCB ASSY223
- Registration Clutch / T1 Pickup Clutch224
- Main Frame L ASSY225
- Paper Feed Motor228
- Develop Joint Gear 37 / Develop Joint230
- Toner Amount Detection Sensor PCB ASSY (Light Reception)231
- MP Solenoid232
- Develop Clutch 51R233
- Internal Temperature Sensor234
- Fuser Drive Gear 39235
- MX Connector ASSY (Touch Panel Models Only)237
- Eject Motor238
- Back Cover/Duplex Tray Sensor239
- LT/TT Connector240
- High-Voltage Power Supply PCB ASSY241
- Eject Sensor PCB ASSY244
- MP Roller Holder ASSY / MP Separation Pad ASSY / MP Separation Pad Spring245
- T1 Paper Feed Sensor PCB ASSY / T1 Paper Feed Actuator / T1 Paper Feed Actuator Spring246
- MP Paper Empty Sensor PCB ASSY / MP Paper Empty Actuator 1 / MP Paper Empty Actuator 2248
- Paper Empty Sensor PCB ASSY (Models with 520-Sheet T1 and HL-5580D/5585D Only)251
- Registration Front/Rear Sensor PCB ASSY252
Disassembly Procedure (Lt Unit)255
- Paper Tray255
- LT Roller Holder ASSY257
- LT Side Cover L258
- LT Side Cover R259
- LT Front Cover ASSY260
- LT Control PCB ASSY261
- LT Pickup Clutch262
- LT Release Clutch263
- LT Connector ASSY / LT Connector Upper266
- LT Paper Feed Sensor PCB ASSY267
- LT Paper Empty Sensor PCB ASSY270
Disassembly Procedure (MX Unit)271
- Bin ASSY A/B271
- MX Relay PCB ASSY276
- MX Switching Solenoid / MX bin Switching Solenoid278
- MX Control PCB ASSY281
- MX Back Cover Sensor282
- MX Connector Holder ASSY283
- MX Motor285
- MX bin Stack Sensor PCB ASSY287
- MX bin Detection Sensor288
- Feed Roller ASSY Upper MX289
- Feed Roller ASSY Lower MX291
Disassembly Procedure (Tt Unit)294
- Preparation294
- Paper Tray295
- TT Roller Holder ASSY297
- Covers298
- TT Control PCB ASSY302
- TT Balance Sensor L / TT Balance Sensor R304
- Fan Motor306
- TT Motor307
- T2TT Unit309
- T3TT Unit311
- Low-Voltage Power Supply PCB ASSY312
- T4TT Unit315
- T5TT Unit317
- LT/TT Connector ASSY (T2TT Only)318
- TT Relay PCB ASSY (Common to All TT)319
- TT Pickup Clutch (Common to All TT)321
- TT Release Clutch (Common to All TT)322
- TT Jam Sensor PCB ASSY (Common to All TT)324
- TT Paper Feed Sensor PCB ASSY (Common to All TT)328
- TT Paper Empty Sensor PCB ASSY (Common to All TT)330
- Adjuster331
Chapter 4 Adjusting and Updating Settings as Required after Parts Replacement332
If You Replace the Main Pcb Assy332
- Installing Firmware (Sub Firmware and Main Firmware)333
  - Checking Firmware Version333
  - Installing Firmware334
- Adjusting Touch Panel (Function Code: 61) (Touch Panel Models Only)335
- Initializing the EEPROM of the Main PCB ASSY (Function Code: 01)335
- Configure for Country/Region and Model (Function Code: 74)336
- Activating Memory Writing336
- Setting Serial Number and Entering Adjusted Value of Laser Unit337
- Adjusting Left-End and Upper-End Print Position (Function Code: 45) (TT Only)338
- Resetting to Factory Shipping State339
If You Replace the Low-Voltage Power Supply Pcb Assy340
- Resetting Irregular Power Supply Counter of the Low-Voltage Power Supply PCB (Function Code: 88)340
If You Replace the Laser Unit341
- Entering Adjusted Value of Laser Unit342
- Resetting Printed Pages Counter of the Laser Unit342
If You Replace the Lcd Panel Assy or Panel Pcb343
- Adjusting Touch Panel (Function Code: 61) (Touch Panel Models Only)343
- Checking LCD Operation (Function Code: 12)343
If You Replace the Fuser Unit344
- Resetting Printed Pages Counter of the Fuser Unit344
If You Replace a Pf Kit345
- Resetting Printed Pages Counter of a PF Kit345
If You Replace the MX / Tt / Lt and Tt/Lt Control Pcb346
- Installing Firmware (Main Firmware)347
  - Checking Firmware Version347
  - Installing Firmware348
- Adjusting Left-End and Upper-End Print Position (Function Code: 45) (TT Only)349
Chapter 5 Service Functions350
Maintenance Mode350
- How to Enter Maintenance Mode350
  - Method of Entering Maintenance Mode for Service Personnel350
  - Method of Entering End-User Accessible Maintenance Mode352
- List of Maintenance Mode Functions353
- Details of Maintenance Mode Functions354
Other Service Functions400
- Print Printer Settings400
- Reset the Drum Unit Counter401
Chapter 6 Wiring Diagram402
- Wiring Diagram402
Chapter 7 Periodical Maintenance406
Safety Precautions406
Periodical Replacement Parts407
- Preparation407
- Fuser Unit408
- Laser Unit412
- PF Kit MP419
- PF Kit 1420
- PF Kit 2/3/4/5422
Appendix 1 Serial Numbering System424
Appendix 2 Deleting User Setting Information427
Appendix 3 Installing the Maintenance Printer Driver428

Brand	Brother
Model	HL-5590DN
Category	Printer
Language	English

Brother HL-5590DN Service Manual

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