Lcd Light Does Not Come On - Brother NX600 Service Manual

Failure Investigation for Electronic Parts LCD light does not come on
Are the single light guide assy.
backlight leads and operation F3 PCB
assy. properly connected?
Are the operation F3 PCB assy. and
main F3D PCB assy. properly
connected?
Is the voltage between pins 2 & 1 on
the operation F3 PCB assy. connector
(CN3) approximately 3 - 4 V?
5 - 16

LCD light does not come on

Y
Y
Y
• Replace operation F3 PCB assy.
or
• Replace main F3D PCB assy.
Properly connect the single
N
light guide assy. backlight leads
to the operation F3 PCB assy.
Connect the operation F3 PCB
N
assy. and main F3D PCB assy.
properly.
N
Replace the single light guide
assy.