Brother International HL 1850 Service Manual - Page 201
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CHAPTER 6 TROUBLESHOOTING M-13 PCI BUS error Possible cause Harness connection failure Network board Main PCB Step 1 2 3 Check Is the connection between connector P21 on the main PCB and connector P1 on the network board secure? Is the problem solved by replacing the network board? Is the problem solved by replacing the main PCB? Result Remedy No Reconnect the connectors securely. Yes Replace the network board. Yes Replace the main PCB. 6-34
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CHAPTER
6
TROUBLESHOOTING
M-13
PCI
BUS
error
Possible
cause
Step
Check
Result
Remedy
Harness
connection
failure
1
Is
the
connection
between
connector
P21
on
the
main
PCB
and
connector
P1
on
the
network
board
secure?
No
Reconnect
the
connectors
securely.
Network
board
2
Is
the
problem
solved
by
replacing
the
network
board?
Yes
Replace
the
network
board.
Main
PCB
3
Is
the
problem
solved
by
replacing
the
main
PCB?
Yes
Replace
the
main
PCB.
6-34