Tadiran Telecom Coral IPx Office, Installation And Hardware Reference Manual, Page: 256 / 510

7-22
Power Supply Coral IPx Office Installation Manual
PS
Office DC Power Su
pply Unit
7
0.
The PS Office DC unit does not include an alarm LED indicator. The front panel of
the IPx Office unit includes eight (8) diagnostic LED indicators. For information on
troubleshooting, see
Front Panel, page 6-3
.
Power supply failure generally results in the loss of one or more output voltages.
However, protection circuitry in the power supply regulator may shut down a regulator
due to a current overload caused by an external fault.
All maintenance activities are to be carried out by a qualified service technician.
If the power supply is turned ON and power is not present in the system, check the
following:
„
DC power wires. See
Figure 7-10 .
„
DC power failure
„
Blown main or circuit fuse/breaker in the building electrical panel
„
Faulty PS Office DC
„
Blown fuse FS1 or on the PS Office DC. Replace fuse as described on
Replacing the PS Office DC Power Fuse, page 7-22
.
0
The PS Office DC employs one fuse (F2) to protect the DC main input. To replace the
DC Power Input Fuse:
1. Remove the power supply unit from its slot and place it over the anti-static
material with the component side facing upwards, as described on
Removing the
Power Supply, page 7-21 .
7. Replace only with the same type and rating of fuse. See the PS Office DC card
layout in
Figure 7-7
on page 7-15
.
8. Reinstall the power supply unit as described on
Installation and Activation, page
7-18
.
...................................................................................................
4 Troubleshooting
...................................................................................................
5 Replacing the PS Office DC Power Fuse
Do not remove the power supply unit from the cage when turned ON. Sudden power
surges could damage system components. Before extracting the PS Office AC card,
verify that the power switch is turned OFF.