CHAPTER 6 TROUBLESHOOTING- Page 144

CHAPTER 6  TROUBLESHOOTING

6-22

M-10

ROM error / D-RAM error / NV-RAM error

Possible cause

Step

Check

Result

Remedy

Main PCB

1

Is it possible to print the test
page with the method of

Subsection 10.1 ‘Test Print
Mode’

 in this chapter?

No

Replace the main PCB.

Software bug

2

Does this problem appear
when printing specific data or
printing under a specific
environment?

Yes

Inform the Brother office of the
used specific data, printer
condition and system
environment.

M-11

Service A (Address error) / Service B (BUS error) / CPU runtime error

Possible cause

Step

Check

Result

Remedy

Main PCB

1

Is it possible to print the test
page with the method of

Subsection 10.1 ‘Test Print
Mode’

 in this chapter?

No

Replace the main PCB.

Software bug

2

Does this problem appear
when printing specific data or
printing under a specific
environment?

Yes

Inform the Brother office of the
used specific data, printer
condition and system
environment.

M-12

Engine interface error

Possible cause

Step

Check

Result

Remedy

Fixing unit
ground wire
connection

1

Is the ground wire on the fixing
unit secured with the shoulder
screw correctly?

No

Secure the ground wire
correctly with the shoulder
screw.

Harness
connection
failure

2

Is the connection between
connector P6 on the main PCB
and connector P3 on the
engine PCB secure?

No

Reconnect the connectors
securely.

Engine PCB

3

Is the problem solved by
replacing the engine PCB?

Yes

Replace the engine PCB.

Main PCB

4

Is the problem solved by
replacing the main PCB?

Yes

Replace the main PCB.

M-13

PCI BUS error (HL-1270N only)

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.

PR99210