Service manual

TP0332/2 A.3
OPERATION
Each pocket of all charger units will accept a battery without radio, or a radio complete with battery.
Radio with Battery
To charge a battery connected to a radio, insert the radio into a charger pocket with the front of the
radio towards the front of the charger. The LED for that pocket will change from amber (Power) to red
(charging in progress). If the battery temperature and voltage are within the permitted ranges, fast charge
will commence; otherwise the battery will be trickle charged until the temperature and voltage are within
the permitted ranges. When the battery has received the correct amount of charge, fast charge will cease,
trickle charge will commence and the LED indicator will change to green (battery ready).
Battery Alone
To charge a battery, insert it into the rear of a charger pocket with the three battery/radio contacts
towards the front of the charger. The LED for that pocket will change from amber (Power) to red (charging
in progress). If the battery temperature and voltage are within the permitted ranges, fast charge will
commence; otherwise the battery will be trickle charged until the temperature and voltage are within the
permitted ranges. When the battery has received the correct amount of charge, fast charge will cease,
trickle charge will commence and the LED indicator will change to green (battery ready).
SERVICE
Cleaning of Charging Contacts
To maintain efficient operation, ensure that the charging contacts on both the charger and battery
are clean. Wipe dirty contacts with a clean damp cloth. Do not use industrial cleaning liquids as these may
react with the plastic of the battery or charger. Do not use abrasives as their use may remove the contact
plating.
Sensing Circuits
The following sensing circuits are included:
(1) Transmit disable If fast charge is occurring, it is disabled if a radio connected to the charger
has its transmitter enabled. When the transmission terminates, the fast
charging resumes.
(2) End-of-charge During fast charge, the cell temperature is monitored and when a positive rate
of change above a defined level is detected, fast charge is terminated.
(3) Hot battery When a battery is inserted into a charging pocket, the battery temperature is
measured; if the temperature is in excess of 40°C fast charge is inhibited until
the battery temperature falls to below 30°C.
(4) Cold battery When a battery is inserted into a charging pocket, the battery temperature is
measured; if the temperature is below 10°C fast charge is inhibited until the
battery temperature rises to above 10°C.
(5) Low battery If the battery voltage is below 6V, re-form charging (320mA) commences and
continues until 6V is reached.
(6) No battery If a battery is not inserted into a charging pocket, the LED for that pocket is
amber (provided power to the charger is on).
(7) Over voltage During fast charge, when 10,5V is reached, the charging current is reduced to
prevent 10,5V being exceeded.