6-8
888-2595-001
12/20/11
WARNING: Disconnect primary power prior to servicing.
Section 6 Troubleshooting
ZX Series
Table 6-3 Module Alarm LEDs
Symptom
Cause and Solution
PA REVERSE
POWER alarm
(left LED behind PA
module)
PA module has experienced a reverse power level of >25W (peak).
If only one PA has alarm, suspect failure of detection circuit on PA
backplane or BNC coax cable from PA backplane to output assembly. Switch
transmitter off and swap one PA cable from affected PA backplane with one
from an adjacent backplane, ensuring to only swap yellow-labeled cables
with other yellow-labeled cables and white-labeled cables with other white-
labeled cables. Switch on transmitter and see if problem remains with
original PA backplane or follows cable to new backplane. If problem
remains with backplane, repeat test with second BNC cable swapped from
affected backplane. If problem still remains with backplane, replace PA
backplane, otherwise remove output assembly and replace faulty BNC coax
cable.
If all PA modules have same alarm, suspect arcing or other failure in output
assembly combiner board or in output transmission line external to
transmitter. Reduce power to very low level via POWER LOWER
pushbutton on controller board (reverse side of front door), switch
transmitter on, and slowly raise power via POWER RAISE pushbutton.
Observe REV PWR W (reverse power) reading on front panel. If reading is
abnormally high, problem is external to transmitter. If reading remains low
until transmitter shuts down all modules suddenly, suspect arcing either
internal or external to transmitter. Switch transmitter off, open rear door,
and inspect output combiner with strong light for plainly visible carbon
tracking or other damage. If none seen, connect transmitter directly to
station test load. If problem disappears, problem is external to transmitter.
If problem remains, proceed to replace output assembly.
If a PA module reports this alarm when a
different
PA module is removed,
this could indicate a combiner ballast load problem. Switch transmitter off,
open rear door, and inspect ballast loads on bottom deck with powerful light.
Remove output assembly and replace any loads with cracking, burning.
Consult section 5 – Maintenance for procedures to follow.
Содержание ZX10
Страница 2: ...ii 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing ...
Страница 4: ...iv 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing ...
Страница 6: ...MRH 2 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing ...
Страница 8: ...viii 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing ...
Страница 9: ...12 20 11 888 2595 001 ix WARNING Disconnect primary power prior to servicing ...
Страница 10: ...x 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing ...
Страница 14: ...xiv 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing ...
Страница 18: ...Table of Contents Continued 4 ...
Страница 80: ...3 12 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing Section 3 Operation ZX Series ...
Страница 162: ...6 16 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing Section 6 Troubleshooting ZX Series ...
Страница 174: ...7 12 888 2595 001 12 20 11 WARNING Disconnect primary power prior to servicing Section 7 Parts List ZX Series ...