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12.14 LT/TT connector ASSY (T2TT only)

(1) Release the LT/TT connector harness from the securing fixtures.

(2) Release the hook A to remove the ferrite core.

(3) Release the two hooks B, and slide the LT/TT connector ASSY in the direction of the

arrow to remove it. Pull out the LT/TT connector harness through the frame L hole.

Fig. 3-170

Harness routing: Refer to “13. Left side of the TT”.

Hook A

LT/TT connector ASSY

LT/TT connector harness

Hooks B

Ferrite core

Hole

Frame L

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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