3-63
Confidential
9.12 Main PCB
Note
•
Before replacing the main PCB, backup the machine and user settings information (refer to
Chapter 5 "1.3.13 Backup of Machine Information (Maintenance mode 46)"
) and the head
Chapter 5 "1.3.25 Updating of Head Property Data and Backup/
Restoration of Head Calibration Data (Maintenance mode 68)"
). After replacing the main
PCB, restore the backed up information to the new PCB. If a backup cannot be done, you
will need to replace the ink absorber box and flushing box and reset the purge and flushing
counters.
•
Before starting work involving the main PCB, make sure that the power cord and
telephone line is unplugged from their outlets.
•
Before removing the main PCB, disconnect the harnesses and flat cables first, then remove
the screws. Also, before reinstalling the main PCB, tighten the screws first, then connect
the harnesses and flat cables. Follow this sequence while making sure that harnesses and
flat cables are not damaged by the screws and the screwdriver.
(1) Disconnect the following harnesses and flat cables from the main PCB.
Note
• Make sure that the main PCB is screwed in place while connecting and disconnecting
harnesses and flat cables.
• After disconnecting flat cables, check that each cable is not damaged at its end or short-
circuited. When connecting flat cables, do not insert them at an angle. After insertion,
check again that the cables are not at an angle.
(3_084)
Document scanning position
sensor harness (3-wire)
Scanner cover
open sensor
harness (2-wire)
PF/registration sensor
harness ASSY (7-wire)
CIS flat cable (12-wire)
(USB interface)
(LAN interface)
Carriage flat cable 1
(20-wire)
Carriage flat cable 3
(7-wire)
Carriage flat cable 2
(8-wire)
Ink sensor flat cable
(16-wire)
Modem PCB harness
(11-wire)
Ink cartridge
cover sensor harness
(2-wire)
Disc guide sensor
harness (2-wire)
Purge cam switch
harness (2-wire)
ASF encoder
sensor harness
(4-wire)
Speaker harness (2-wire)
LCD flat cable (50-wire)
Pressure roller release sensor
harness (3-wire)
Main PCB
(USB interface)
Power supply harness
(6-wire)
Wireless LAN PCB
harness (4-wire)
Paper feed motor harness
(2-wire)
ASF motor harness (2-wire)
Document scanner
motor harness
(4-wire)
ADF motor harness
(2-wire)
Document detection
sensor harness
(3-wire)
Carriage motor
harness (2-wire)
Summary of Contents for DCP-J552DW
Page 120: ...3 3 Confidential 2 PACKING 3_002 ...
Page 127: ...3 10 Confidential 2 CIS flat cable 3_011 CIS flat cable Cable guide Cable guide Flat core ...
Page 220: ...4 10 Confidential ADF Copy Chart C A B D ...
Page 244: ...5 12 Confidential Scanning Compensation Data List ...
Page 246: ...5 14 Confidential Test Pattern ...
Page 254: ...5 22 Confidential MFC J450DW J470DW J475DW MFC J650DW J870DW J875DW ...
Page 270: ...5 38 Confidential pfadj1 Pattern ...
Page 271: ...5 39 Confidential pfadj2 Pattern ...
Page 272: ...5 40 Confidential pfadj3 Pattern ...
Page 278: ...5 46 Confidential Vertical Lines Check Pattern ...
Page 279: ...5 47 Confidential Ruled Lines Check Pattern ...
Page 283: ...5 51 Confidential Margin Check Pattern ...
Page 284: ...5 52 Confidential Margin Check Pattern ...
Page 314: ...6 3 Confidential Power supply PCB 100 V series ...
Page 315: ...6 4 Confidential Power supply PCB 200 V series ...
Page 329: ...App 3 8 Confidential When the following screen appears click Close to close the screen ...