GatesAir Inc. CZF Manual De Usuario
APEX
™
Exciter Incorporating FLO
™
Technology
Maintenance and Troubleshooting
General Troubleshooting
Page: 5-16
888-2604-001
03/08/07
WARNING: Disconnect primary power prior to servicing.
5.6
General Troubleshooting
This section is a general troubleshooting guide to the APEX exciter.
The digital techniques used in the exciter result in a highly reliable product, but when there
is a need to check the exciter or the signal passing through it, much, if not all, of the trouble
shooting will be performed through the LCD screens, and perhaps some test equipment.
is a need to check the exciter or the signal passing through it, much, if not all, of the trouble
shooting will be performed through the LCD screens, and perhaps some test equipment.
The following paragraphs describe the levels and indications which may be used to verify
proper operation of an APEX exciter or to isolate a possible problem in the unit to a circuit
board level. In this chapter, troubleshooting is divided into two categories.
proper operation of an APEX exciter or to isolate a possible problem in the unit to a circuit
board level. In this chapter, troubleshooting is divided into two categories.
• System Troubleshooting - Problems caused by conditions outside the exciter.
• Exciter Troubleshooting - Problems caused within the exciter.
5.6.1
Troubleshooting Tips
If an exciter problem is suspected, first try to narrow the suspect area to a part of the
exciter.
exciter.
1
Is the exciter powered? Make certain power is applied and the AC power switch is
turned on.
turned on.
The fan, at the rear of the exciter, should be running and the LCD display should be il-
luminated.
luminated.
2
If the exciter display is completely dark touch the display to see if it illuminates. The
screen saver may have been active. Troubleshooting a dark screen is covered in Sec-
tion 5.8.2 on page 5-19.
screen saver may have been active. Troubleshooting a dark screen is covered in Sec-
tion 5.8.2 on page 5-19.
3
Are there any fault indications on the LCD display or front panel LEDs?
A yellow fault display is a warning that a parameter is approaching a limit. A red fault
display indicates that the parameter has exceeded its limit.
display indicates that the parameter has exceeded its limit.
Touching the flashing fault soft key at the bottom of any screen will switch the dis-
play to the status screen for the faulted board, or the System Status screen if faults in
more than one board exist. The Various screens of the LCD display should quickly
lead to a faulty circuit board.
play to the status screen for the faulted board, or the System Status screen if faults in
more than one board exist. The Various screens of the LCD display should quickly
lead to a faulty circuit board.
4
Circuit board operating voltages are listed on most of the status screens. If a voltage on
any of the screens is out of tolerance, a red fault indication appears to the right of the
voltage indication.
any of the screens is out of tolerance, a red fault indication appears to the right of the
voltage indication.
5
Is the RF output at the normal level? The exciter output can be set to any level from 0
to 100 mW average. Each transmitter has its own unique input drive requirement,
which should be recorded in the transmitter final test data. If the normal input to your
transmitter is not known, it should fall somewhere in this range.
to 100 mW average. Each transmitter has its own unique input drive requirement,
which should be recorded in the transmitter final test data. If the normal input to your
transmitter is not known, it should fall somewhere in this range.
6
If there is no output, check the RF Mute status on the at the bottom of any screen. It
will indicate On-Air, Off-Air, or Mute.
will indicate On-Air, Off-Air, or Mute.
If the exciter stays muted when attempting to unmute from the exciter setup screen,
check the mute status on the System Control Status 2/4, External I/O Board. If it indi-
cates On, a mute command is being sent to the external I/O board via connector J1
check the mute status on the System Control Status 2/4, External I/O Board. If it indi-
cates On, a mute command is being sent to the external I/O board via connector J1