Comtech EF Data SMS-458B - Manual (Page 92)

SMS-458B Modem Protection Switch Revision2
Maintenance MN/SMS458B.IOM
5–6
+12V FAILURE, -12V FAILURE, +5V FAILURE
(+12V_FLT, -12V_FLT, +5V_FLT) Check the power supplies and modules
for proper insertion into the motherboard
connectors.
The voltage limit comparators are not
user adjustable. Consult the factory if
the voltage failure alarm continues to be
displayed.
POWER SUPPLY 1 (or 2) FAULT
(PS_1(2)_FLT) Check the power supplies for proper
insertion into the motherboard
connector.
Verify that the power switch on the
indicated power is in the on position.
Verify that the power cord for the
indicated power supply is plugged into
the chassis.
Check the fuse of the indicated power
supply.
The power supplies are not user
serviceable. Contact the factory if a
power supply failure is suspected.
5.2.4 Battery
Faults Procedures
M&C BATTERY FAULT
(M&C_BAT_FLT) Check the position of the internal battery
jumper on the M&C board.
Check the battery for bent or displaced
leads.
The NiCad battery on the M&C board is
rechargeable and may require up to 48
hours to fully charge.