6-22
888-2406-002
WARNING: Disconnect primary power prior to servicing.
Troubleshooting
6.11.4 PA#_UC, PA Under-Current Fault
PA Under-current is comparing the current readings of the PAs which are common
to each foursome. For example, B1, B2, B3 and B4. All four of these PAs are
plugged into one 4-way combiner. If one of these PAs has a current reading that is
less than 10% of the average current of the other three, the system will be muted for
120mS, the isolation switch for that PA activated, removing the PA from the
combiner (removing the PA from the combiner), and the mute released on the rest of
the PAs.
6.11.5 PA#_MUTE_FLT, PA Mute Fault
Whenever a mute is applied to the PAs, the current draw by each PA is also checked.
If a MUTE is being applied but there is still current flow in a PA, then a
MUTE_FLT will cause the entire transmitter to be MUTED until all currents are
under 1 amp. This is most likely a metering problem.
!
CAUTION:
WHEN A MUTE FAULT OCCURS, BE SURE TO SHUT THE TRANSMITTER
OFF BEFORE REMOVING ANY MODULES TO PREVENT ARCING OF THE
PA EDGE CONNECTORS.
6.11.6 PA#_OT, PA Over-Temperature Fault
The temperature of each PA is sensed by thermistor, RT1 (located on each
individual amplifier board). If the temperature reaches 100°C, the transmitter will
disconnect the problem PA via the isolation switch. If one of the thermistors or its
wiring is shorted the temperature indication will be 155°C or higher.
6.11.7 PA#_OUT, PA Out Fault
This is the interlock fault for each PA. Two of the edge connector contacts on each
PA, J1-A and J1-V, are shorter than the others. They will not make contact unless
the PA is fully engaged in the Z Plane connector. If the PA is not inserted, these two
contacts are open and the controller will disconnect the PA from the system and
report the fault in the Fault Log as B#_OUT (where # is a number from 1-8). This
information also shows up in the Diagnostics Display “Status Menus” under PA
Status. To check the status of each PA press [STATUS C].
6.11.8 PA#_ISO, PA ISO Over-Temperature Fault
The fault threshold for the PA Isolation load resistors is 150°C. These resistors are
located on the Isolation Boards mounted on the side of the PA. Normally the ISO
resistors have minimal current flow through them and run about 40-100°C. If the
amplifier connected to the ISO resistor has a difference in phasing or amplitude
compared to the other three amplifiers in its foursome, then the resistor will try to
Summary of Contents for Platinum Z2 CD
Page 4: ...888 2406 002 WARNING Disconnect primary power prior to servicing ...
Page 6: ...888 2406 002 WARNING Disconnect primary power prior to servicing ...
Page 8: ...888 2406 002 WARNING Disconnect primary power prior to servicing ...
Page 10: ...888 2406 002 WARNING Disconnect primary power prior to servicing ...
Page 70: ...3 14 888 2406 002 WARNING Disconnect primary power prior to servicing Operator Guide ...
Page 130: ...4 60 888 2406 002 WARNING Disconnect primary power prior to servicing Overall System Theory ...
Page 194: ...6 38 888 2406 002 WARNING Disconnect primary power prior to servicing Troubleshooting ...
Page 196: ...7 2 888 2406 002 WARNING Disconnect primary power prior to servicing Parts List ...
