Led Does Not Turn On - Brother P-touch QL-700 Service Manual

[3]

LED does not turn on.

LED does not turn on.
Is the cable of the SB PCB
connected correctly?
lines in the cable broken?
Is the input signal to
Is the voltage between each Pin
more than 3V with an oscilloscope?
STATUS lamp:
Green CN3, Pin4
Editor Lite lamp:
Green CN3, Pin8
Replace the main PCB ASSY.
N
Y
Are any of the
Y
N
N
the button OK?
Y
Red CN3, Pin3
N
* The ON/OFF button supports the Status LED.
The Editor Lite button supports the Editor Lite LED.
Correct the connection.
Replace the SB PCB ASSY.
Replace the SB PCB ASSY.
Y
Replace the SB PCB ASSY.
IV - 9