Instruction manual
To Exchange a Fan-and-Power-Supply Assembly
Note: The illustrations in the following instructions show a 2104 Model DU3. The steps
for exchanging a fan-and-power-supply assembly in a 2104 Model TU3 are the
same, but the parts are turned through 90 degrees.
1. Set the DC On/Standby switch 1 on the fan-and-power-supply assembly to
Standby.
Note: The DC PWR light might stay on for a short time. Wait until it is off before
you go to the next step.
Figure 34. Fan-and-Power-Supply DC On/Standby Switch
46 2104 Models DU3 and TU3 Operator’s Guide