Fan flowchart
FAN ERR display appears on the VFD
Enter the Service Mode and turn on the fan
from the IFcon menu
Is the voltage of CN1503 pin3 on the order
of 5V?
No
Disconnect the harness from the fan that is
inserted in CN1503 and take the
No
Is the voltage of IC1501 pin2 on the order of
3.3V?
No
Is the connection between IC1501 pin1 and
IC1503 pin58 broken? Also check whether
Yes
Yes
Yes
Is the fan roating?
No
Replace the fan
Check around the fan power supply(IC1501).
Yes
Is FanState of the Service Mode screen set
to ON?
No
Disconnect the harness from the fan that is
inserted in CN1503 and short pins 1 and 2
together.
Does FanState of the Service Mode screen
go ON?
No
Is the connection between IC1503 pin2 and
IC1503 pin55 broken?
Also check whether the trace is bridged with
the adjacent one.
Yes
Yes
Check whether something is caught in the
fan blades. If there is nothing there, replace
Replace the fan.
9-13
BDP-S4805