Main Pcb - Brother DCPJ525W Service Manual

9.11 Main PCB

Caution: Before replacement of the main PCB, back up the machine information and user
setting information (refer to
(Function code 46) (User-accessible)"
Section 1.4.23 "Updating of Head Property Data and Backup/Restoration of Head
Calibration Data (Function code 68)."
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 (MFC only) is disconnected; otherwise, an electric shock
could occur.
Vorsicht: Bevor Sie auf das Mainboard zugreifen, stellen Sie sicher, dass der Netzstecker aus
der Netzsteckdose gezogen und das Telefonkabel entfernt ist. Andernfalls kann es zu einem
Stromschlag kommen.
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.
- Disc guide sensor harness (2-wire)
- High-yield ink cartridge sensor flat cable (7-wire)
- Ink remaining sensor flat cable (9-wire)
- Ink cartridge detection sensor flat cable (8-wire)
- Ink cartridge cover sensor harness (2-wire)
- Purge cam switch harness (2-wire)
- ASF* encoder sensor harness (4-wire) (*Auto Sheet Feeder)
- Pressure roller release sensor harness (3-wire)
- Carriage flat cable 4 (9-wire)
- Carriage flat cable 3 (10-wire)
- Carriage flat cable 2 (7-wire)
- Carriage flat cable 1 (8-wire)
- Carriage motor harness (2-wire)
- ASF* motor harness (2-wire)
- MJ (EXT) harness (2-wire)
- Paper feed motor harness (2-wire)
- PF/registration sensor harness ASSY (7-wire)
- Power supply harness (6-wire)
- Wireless LAN PCB harness (4-wire)
Chapter 5, Section 1.4.12 "Backup of Machine Information
and the head calibration data (refer to
After replacement, restore the backed up
*1
*2
3-78
Chapter 5,
*1 For disc printing models
*2 For MFC only
Confidential