2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
2820A-02-UM
REV 1.0
20
7 TROUBLESHOOTING
Most problems are usually simple issues that can often be found by careful inspection of the chamber
communicator and wiring. The following section will describe the troubleshooting procedure for
several common issues.
7.1
CONNECTION ISSUES
Most communicator problems are caused by bad connections. Making good connections will
result in years of good communications. For longer life, all chamber connections to the MS
connector should be soldered and copper wire must be tinned. It is strongly suggested that
dual banana plugs be used for operator connection to provide convenient and secure
connections. Make sure the MS connector is completely seated and the retaining ring is tight.
If you experience issues, remove the MS connector and inspect for dirt or corrosion; repair or
replace if necessary.
7.2
LOW BATTERY INDICATION
The BATTERY CONDITION INDICATOR indicates the battery level or state-of-charge by
monitoring the battery voltage. The voltage has to be 9 Volts or greater for the communicator
with rechargeable battery to operate. It is recommended that the communicator be recharged
for at least 10 hours if the measured voltage is less than 12 Volts (depending on the age of
the battery and the surrounding temperature). If the BATTERY CONDITION INDICATOR
indicates a low, (blinking LED) or bad (off LED) after charging, then either the battery is bad
and needs to be replaced or the charger has malfunctioned.
7.3
UNIT NOT OPERATING
The most common reason that a chamber communicator appears to be dead when the
POWER SWITCH and SPEAKER SWITCH are turned on is a bad or loose battery. Check
the battery per section 7.2.
If the battery and battery connections appear good and the communicator fails the check-out
procedure, then remove the screws holding the front panel. Remove the screw holding the
front panel the chassis and lift the front panel up carefully as the panel components are
connected to a Printed Circuit Assembly (PCA) by a wire harness. Verify that the connectors
on the PCA are firmly seated. Check that the wire harnesses are soldered to the various
connectors, controls, and speaker. There should be no loose wires in the system. Remove
the fuse from the PCA. It is marked F1 and is a cylindrical component. Verify that the fuse is
good by checking the continuity with a multi-meter. If the fuse is open, replace with the same
type: 3.15 Amp, 250V, Fast Acting. Reconnect the chassis to the front panel; re-install the
communicator into the panel and re-test the communicator. If the communicator still appears
dead, contact Amron for further assistance.
WARNING!
When changing the battery it is critical that the RED wire be connected to the
positive terminal of the battery and the BLACK wire connected to the negative
terminal of the battery.
Summary of Contents for 2820A-02
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