Orban OPTIMOD-FM 5500 Operation Manual page 196

4-4
MAINTENANCE
I) Carefully pull the I/O+DSP board toward the front panel to clear the XLRs
from their housings. Then lift the board out of the chassis.
6. Removing the Power Supply:
IMPORTANT: The power supply has no user serviceable components because re-
placing components with other than exact replacements could cause the supply
to become unsafe and/or to generate unacceptable EMI that violates FCC and/or
CE regulations. If the power supply fails, please contact Orban Customer Service
(custserv@orban.com) to obtain an exact replacement.
Verify that the 5500 is disconnected from the AC line.
A) If you have not yet done so, remove the top cover (step 1, above).
B) Remove the screw holding the power supply's insulating cover and remove
the cover. For safety, this cover must always be in place when the 5500 is con-
nected to the AC line.
C) Remove the plug that connects the power supply to the AC line socket.
D) Unplug the cable connecting the output of the power supply to the I/O+DSP
board.
E) Using a hex nutdriver, remove the threaded standoff that supports the power
supply's insulating cover.
F) Remove the three Phillips screws holding the power supply to the main chas-
sis.
G) Carefully lift the power supply up to remove it.
7. Reattaching the Power Supply:
A) Set power supply into main chassis, so that it aligns with its associated stand-
offs.
B) Thread, but do not tighten, the three Phillips screws that hold the power sup-
ply board to the main chassis.
C) Thread the long threaded standoff in the remaining mounting hole. Tighten
it firmly.
D) Tighten the three Phillips screws that hold the power supply board to the
main chassis.
E) Reattach the plug that connects the power supply to the AC line socket.
F) Reattach the cable that connects the power supply board to the I/O+DSP
board.
G) Secure the insulating cover to the long standoff. This cover must be re-
placed for safety.
8. Replacing the Control board and I/O Board+DSP board:
Referring to steps 4 and 5, follow the instructions in reverse.
ORBAN MODEL 5500