2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL
282XA-UM
REV 5.0
26
5.5
TROUBLESHOOTING
Most problems are usually simple issues that can often be found by careful inspection of the
diver communicator, diving umbilical, and diver wiring. The following section will describe the
troubleshooting procedure for several common issues. If these sections do not cover your
particular issue, it is recommended that the diving umbilical be disconnected from the diver
communicator and the check-out procedures in section 5.1 or 5.2 be conducted. If the diver
communicator passes the check-out procedures then the issue is most likely in the umbilical
connections, the umbilical itself, or the wiring of the diver's hat/helmet.
5.5.1
CONNECTION ISSUES
Most diver communicator problems are caused by bad connections. Making good
connections will result in years of good communications. For longer life, all
connections should be soldered and copper wire must be tinned. It is strongly
suggested that dual banana plugs be used topside to provide convenient and
secure connections.
All cable splices must be soldered. Splices should be staggered and covered with
shrink tubing (preferably shrink tubing with an adhesive sealant) and a general
splice cover to protect the connections. Potting the splices to create a reliable
splice is preferred but not necessary to create a reliable splice.
5.5.2
LOW BATTERY INDICATION
The BATTERY CONDITION INDICATOR indicates the battery level or state-of-
charge by monitoring the battery voltage. The battery voltage can be measured
independently using a Voltmeter by measuring the voltage across the EXTERNAL
BATTERY JACK. 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.
5.5.3
UNIT NOT OPERATING
The most common reason that a diver 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 4.2.1. If the battery is good, then disconnect any
diving umbilical and perform the communicator check out procedure per section 5.1
or 5.2.
If the battery and battery connections appear good and the communicator fails the
check-out procedure, then remove the screws holding the front panel. 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 FH1 and is a cylindrical component.
