The Lamp At Hand Does Not Have Light - Baby Lock BLMY Service Manual

Failure Investigation for Electronic Parts The lamp at hand does not have light
The work area lamp does not light
Are the main NF3D PCB assy. and
PCB Unit LED lamp FL correctly
connected?
Are the SS-VR F2 PCB assy. and
PCB Unit LED lamp FR correctly
connected?
Are the main NF3D PCB assy. and
operation U22 PCB assy. properly
connected?
Is the voltage between pins 5 & 4 of
the power supply unit F output
connector 26 V DC?
• Replace PCB Unit LED lamp FL
• Replace PCB Unit LED lamp FR
• Replace SS-VR F2 PCB assy.
• Replace operation U22 PCB assy.
• Replace main NF3D PCB assy.
Y
Y
Y
Y
or
or
or
or
Reconnect the main NF3D PCB
N
assy. and PCB Unit LED lamp
FL correctly
Reconnect the SS-VR F2 PCB
N
assy. and PCB Unit LED lamp
FR correctly
Reconnect the main NF3D
N
PCB assy. and operation U22
PCB assy. correctly
N
Replace power supply F
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