Power Does Not Come On - Baby Lock Ellisimo BLSO Service Manual

Failure Investigation
for Electronic Parts
When the power is turned on,
nothing appears on the LCD.
Is the power supply cord free from
damage and connected correctly?
Is the inlet assy. free from damage and correctly
connected to the power supply PCB assy.?
Is the power switch free from damage and correctly
connected to the power supply PCB assy.?
Is the lead wire assy main-panel free
from damage and correctly connected
to the power supply PCB assy. (CN29)
and panel PCB assy. (CN5)?
Is the lead wire of the power supply PCB
free from damage and correctly connected
to the main PCB assy. (CN12)?
When the power PCB connector (main
PCB(CN12)) is disconnected, are the
voltages between pins 6 & 5 normal?
• Between pins 6 & 5 : 24.7-27.3V DC
When the lead wire assy main-panel is
removed from the main PCB assy. and
power is turned on in the "no-front-cover
test" mode, does the buzzer sound?

Power does not come on

Y
Y
Y
Y
Y
Y
Y
To next page
65
N
Connect the power supply
cord correctly or replace it.
N
Connect the inlet
correctly or replace it.
N
Connect the power switch
correctly or replace it.
N
Connect the lead wire assy main-
panel correctly or replace it.
N
Connect the power supply
unit correctly or replace it.
N
Replace the power supply unit.
N
Replace the main PCB assy.?
assy.
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