12/20/11 888-2595-001 6-3
WARNING: Disconnect primary power prior to servicing.
Section 6 Troubleshooting
ZX Series
Table 6-1 Transmitter Front Panel
Symptom Cause and Solution
MODE LED is green Transmitter is switched on and operating normally with no alarms being
reported.
MODE LED is yellow Transmitter is switched on but alarms are being reported. Open amplifier
front door and inspect alarm LEDs on controller board (reverse side of front
door). Consult entries for any reported alarms in
Table 6-2.
MODE LED is red Transmitter is switched off or is switched on but no PS modules are activated
(all PA modules are off).
Press front panel ON button to start transmitter. If nothing happens, open
front door and inspect alarm LEDs on controller board (reverse side of front
door). Consult entries for any reported alarms in
Table 6-2.
Transmitter power too
high or too low
Consult section on Power Control later in Table 6-4.
MODE led indicates
incorrect mode of
transmitter operation
relative to exciter
Verify exciter interface cable is proper type and installed between exciter and
amplifier. See Section 2 – Installation for more information on exciter
interconnect cable.
Transmitter has shut
down spontaneously.
No front panel lights
whatsoever and meter
appears dead.
Possible AC mains failure. Verify AC presence by status of AC>90V light on
PS modules. Reset external breaker or wait for mains power to return, as
applicable.
Possible all PS modules removed from transmitter. +5V logic power is
supplied by each PS module (diode-OR). At least one PS module must be
installed for transmitter control logic to be active.
Possible grounding of +5V logic voltage. Open transmitter front door and
check status of green +5V LED on controller board (reverse side of front
door). Measure +5V with voltmeter as desired. If +5V missing on controller,
check seating of ribbon cable to controller. If no problem found, proceed to
remove AC mains power from one AC input, such that an AC FAULT LED
should be lit on PS interface board. Disconnect internal ribbon cable
connections one at a time until +5V is restored and AC FAULT LED lights
up. For safety reasons, disconnect mains power each time amplifier rear door
is opened, and reapply power once rear door is safely closed. Replace faulty
board or cable causing short circuit.
To Next Page
Loading...