4. DAILY MAINTENANCE AND PERIODIC INSPECTION AND MAINTENANCE
4.3 Replacement Methods
– 42 –
(5) External power supply unit (PD25)
The external power supply unit is the 24VDC power supply for the control section used for the
system mounted with an HDD.
This unit is generally installed in the electric cabinet.
a) Replacement procedures
Always replace the external power supply unit with the control section power turned OFF.
①
Check that the control section power is turned OFF. (If the power is not OFF, turn it OFF.)
②
Open the electric cabinet door.
③
Disconnect all cables connected to the external power supply unit.
④
Remove the fixing screws fixing the external power supply unit to the electric cabinet, and
remove the external power supply unit from the electric cabinet.
(Loosen the two lower fixing screws first, and then remove the upper fixing screw while
supporting the unit with a hand. Then lift the unit upward and off. The two lower fixing screws
do not need to be removed.)
⑤
Replace with a new external power supply unit, and fix the unit onto the electric cabinet with
the fixing screws.
⑥
Connect all cables connected to the external power supply unit. (Connect the cables to the
designated connectors.)
⑦
Close the electric cabinet door.
Electric cabinet
External power supply unit (PD25A)
Fixing screws (3 screws)
Incorrect connections may damage the devices, so connect the cables to the specified
connectors.
Do not replace the external power supply unit while the power is ON.
Do not connect or disconnect the connection cables between each unit while the power is ON.
CAUTION