Power Does Not Come On - Brother CE-5500PRW Service Manual

Failure Investigation
for Electronic Parts
When the power is turned on, nothing appears on the LCD
and the buzzer does not sound.
* In case of models not equipped with the start/stop button.
When the power is turned on, nothing appears on the LCD.
Is the power supply cord free from
damage and connected correctly?
When the inlet assy. connector is
disconnected from the power supply
PCB assy. and the power is turned
on, is the voltage between pins
120V AC?
When the power lead wire assy. is
disconnected from the power supply
PCB assy. connector (CN201), is
the voltage between pin 2 and 3, 4
and 3 normal?
• Between pin 2 and 3 : 5V DC
• Between pin 4 and 3 : 30V DC
Is the resistance between pin 1 and
1, 2 and 2, 3 and 3, 4 and 4, 5 and
5 at the power lead wire assy. 1Ω
or less?
Replace the main PCB assy.

Power does not come on

Y
Y
Y
Y
N
Connect the power supply
cord correctly or replace it.
N
Replace the inlet assy.
N
Replace the power supply
PCB assy.
N
Replace the power lead wire assy.
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