Power Supply Problems - Ericsson RX8000 Series Reference Manual

Before replacing the rear panel fuse, disconnect the unit from the supply. Failure to
do this may expose hazardous voltages. Unplug the unit from the local supply
socket.
1. Ensure that power is turned off and the power cable is disconnected from the
2. Ease out the fuse carrier by placing a small, flat-bladed screwdriver in the notch
When replacing the power input fuse, always ensure that a fuse of the correct type
and rating is fitted. Failure to do so may result in inadequate protection.
3. Replace the fuse in the carrier.
4. Insert the fuse carrier back in the AC power inlet.
Figure 7.1 Fuse Carrier
If the replacement fuse also blows, do not continue. Disconnect the equipment and
contact Ericsson Customer Services (see Preliminary Pages) for advice.
7.4.5

Power Supply Problems

Do not attempt to service the Power Supply Unit as opening or removing covers
may expose dangerous voltages or other hazards. Refer all servicing to service
personnel who have been authorized by Ericsson.
Use the following techniques to fault-find according to the observed symptom(s)
when a power supply failure is suspected.
EN/LZT 790 0005 R1A
AC power inlet.
at the top of the carrier.
Warning!
Caution...
AC Power Inlet
To access the fuse, ease out
the notch with a small flat-
blade screwdriver.
Fuse Carrier
Warning!
Chapter 7
7-7