Brother PR600II Service Manual page 287

Failure Investigation for Electronic Parts The power is not turned on.
Is the inverter lead properly connected to
connector CN5 on the panel PCB and
connector on the inverter PCB?
Is the resistance between each pin at both ends
1 Ω or below when inverter leads are removed
from the panel PCB and the inverter PCB?
Does the machine function normally when the
inverter PCB is replaced with a reliable one?
Is the LCD's lead properly connected to
connector on the inverter PCB?
Is the FFC for the LCD properly connected to connector
CN2 on the panel PCB and the LCD's connector?
Does the machine function normally when the
FFC for the LCD is replaced with a reliable one?
Does the machine function normally when the
LCD module is replaced with a reliable one?
From the previous page
Y
Y
N
Y
Y
N
Y
Change LCD modules.
N
Connect it properly.
N
Change inverter leads.
Y
Change inverter PCB.
N
Connect it properly.
N
Connect it properly.
Y
Change FFC for the LCD.
N
Change panel PCB.
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