6-36
Confidential
6.1.9 Main PCB
Caution: Before replacement of the main PCB, back up the machine information and user
setting information, referring to
Chapter 9, Section 9.4.11 "Backup of Machine
Information (Function code 46) (User-accessible)."
After replacement, restore the backed
up information to the new PCB. Failure to do so requires replacing also the ink absorber
box and flushing box after replacement of the main PCB.
Caution:
Before accessing the main PCB, make sure that the power cord is unplugged from the
electrical outlet and the telephone line is disconnected; otherwise, an electric shock could occur.
Caution:
At the time of removal of the main PCB, untightening screws should be preceded by
disconnection of the harnesses and flat cables, and at the time of installation, connection of the
harnesses and flat cables, by tightening of screws. Observing this sequence prevents harnesses
and flat cables from getting crushed or damaged by screws or screwdrivers.
(1) Disconnect the following harnesses and flat cables from the main PCB
Caution:
Do not remove the screws from the main PCB before disconnecting harnesses
and flat cables.
Note:
After disconnecting the flat cables, check that each cable is not damaged at its end or
short-circuited. When connecting the flat cables, do not insert them at an angle. After
insertion, check again that they are not at an angle.
- Ink cartridge detection sensor harness (7-wire)
- Ink empty sensor harness (9-wire)
- ASF* encoder harness (4-wire) (*Auto Sheet Feeder)
- Purge cam switch harness (2-wire)
- Cap lift cam switch harness (2-wire)
- Power supply harness (5-wire)
- PF encoder/registration sensor harness (7-wire)
- Paper feed motor harness (2-wire)
- ASF* motor harness (2-wire)
- Carriage motor harness (2-wire)
- Head flat cable 1 (13-wire)
- Head flat cable 2 (12-wire)
- Head flat cable 3 (11-wire)
- WLAN PCB harness (6-wire)*
1
*1 For wireless LAN-enabled model.
Main PCB
Power supply
harness
(5-wire)
Carriage motor harness
(2-wire)
Paper feed motor
harness
(2-wire)
PF encoder/
registration
sensor harness
(7-wire)
(Panel-main harness)
(5-wire)
(Color LCD flat cable)
(28-wire)
For debugging at the factory.
Do not disturb it.
(Document sensor PCB harness)
(5-wire)
Ink empty
sensor
harness
(9-wire)
Main-MJ (EXT) harness
(2-wire, black)
Main-MJ (LINE) harness
(2-wire, yellow)
ASF motor harness
(2-wire)
Ink cartridge
detection sensor
harness
(7-wire)
Purge cam switch
harness
(2-wire)
ASF encoder harness
(4-wire)
Cap lift cam
switch harness
(2-wire)
(LAN interface)
(CIS flat cable) (12-wire)
Head flat cable 1 (13-wire)
Head flat cable 2 (12-wire)
Head flat cable 3 (11-wire)
(CIS motor harness)
(4-wire)
(Speaker harness)
(2-wire)
(Battery harness)
(5-wire)
(ADF motor harness)
(4-wire)
(USB interface)
For debugging at
the factory.
Do not disturb it.
(Main_PCB_BHL9_A3_1)
WLAN PCB harness*1
(6-wire)
Summary of Contents for MFC 5890CN - Color Inkjet - All-in-One
Page 8: ...vi Confidential ...
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Page 14: ...xii Confidential ...
Page 15: ...xiii Confidential ...
Page 16: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
Page 20: ...1 3 Confidential 1 2 CONTROL PANEL 10 9 7 8 6 1 2 3 4 5 ...
Page 21: ...1 4 Confidential ...
Page 22: ...1 5 Confidential ...
Page 24: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 48: ...2 22 Confidential ITU T Test Chart 1 ...
Page 49: ...2 23 Confidential Brother Chart ...
Page 50: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 96: ...Confidential CHAPTER 4 ERROR INDICATION AND TROUBLESHOOTING ...
Page 100: ...4 2 Confidential 1 Error messages appearing on the LCD ...
Page 101: ...4 3 Confidential ...
Page 102: ...4 4 Confidential Check that you have subscribed to the Caller ID service ...
Page 103: ...4 5 Confidential ...
Page 104: ...4 6 Confidential ...
Page 150: ...Confidential CHAPTER 5 HANDLING DATA HELD IN THE MACHINE PRIOR TO REPAIR ...
Page 154: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 245: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 252: ...7 5 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 260: ...7 13 Confidential Head Positioning Test Pattern ...
Page 264: ...7 17 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 265: ...7 18 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 267: ...7 20 Confidential Vertical Alignment Check Patterns 2 2 ...
Page 271: ...7 24 Confidential Left and Right Margin Check Pattern ...
Page 272: ...7 25 Confidential Bottom Margin Check Pattern ...
Page 282: ...7 35 Confidential ADF Copy Chart A B C D ...
Page 286: ...Confidential CHAPTER 8 CLEANING ...
Page 290: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Page 298: ...9 6 Confidential Scanning Compensation Data List ...
Page 301: ...9 9 Confidential Test Pattern ...
Page 306: ...9 14 Confidential Configuration List ...
Page 322: ...9 30 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 323: ...9 31 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 328: ...9 36 Confidential Vertical Alignment Check Patterns 1 2 ...
Page 329: ...9 37 Confidential Vertical Alignment Check Patterns 2 2 ...
Page 333: ...9 41 Confidential Left and Right Margin Check Pattern ...
Page 334: ...9 42 Confidential Bottom Margin Check Pattern ...
Page 364: ...App 2 3 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 445: ...App 6 4 Confidential B Power supply PCB 100 V series ...
Page 446: ...App 6 5 Confidential B Power supply PCB 200 V series ...