The Lamp At Hand Does Not Have Light - Brother NV4000D Service Manual

Failure Investigation for Electronic Parts The lamp at hand does not have light
Are the main PCB assembly and
LED lamp L assembly correctly
connected?
Are the panel PCB assembly and
LED lamp R assembly correctly
connected?
Are the panel PCB assembly and
LED lamp work area assembly
correctly connected?
Is lead wire A on the main panel
free from damage and correctly
connected to the main PCB (CN17)
and panel PCB (CN1)?
The lamp does not light.
Is the lamp set to "ON"?
Y
Y
Y
Y
Y
To next page
N
Set the lamp to "ON."
Reconnect the main PCB
N
assembly and LED lamp L
assembly.
Reconnect the panel PCB
N
assembly and LED lamp R
assembly.
Reconnect the panel PCB
N
assembly and LED lamp work
area assembly.
N
Reconnect lead wire A on the
main panel or replace it.
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