Brother XR9000 Service Manual page 143

Failure Investigation
for Electronic Parts
When the power lead wire assy. is
disconnected from the power supply
PCB assy. connector (CN201), are
the voltages between pins 2 & 3
and 4 & 3 normal?
• Between pins 2 & 3 : 5V DC
• Between pins 4 & 3 : 30V DC
5 - 20
Error is displayed
"F7" is displayed.
Replace the SSVR PCB assy.
or
Replace the main PCB assy.
"F8" is displayed.
Y
Replace the main PCB assy.
N
Replace the power supply
PCB assy.