Lcd Light Does Not Come On - Baby Lock BLMY Service Manual

Failure Investigation for Electronic Parts LCD light does not come on
Are the single light guide assy.
backlight leads and operation U22
PCB assy. properly connected?
Are the operation U22 PCB assy. and
main NF3D PCB assy. properly
connected?
Is the voltage between pins 2 & 1 on
the operation U22 PCB assy. connector
(CN2) approximately 3 - 4 V?
• Replace operation U22 PCB assy.
• Replace main NF3D PCB assy.

LCD light does not come on

Y
Y
Y
or
Properly connect the single
N
light guide assy. backlight leads
to the operation U22 PCB assy.
Connect the operation U22
N
PCB assy. and main NF3D
PCB assy. properly.
N
Replace the single light guide
assy.
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