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Chapter IX
Maintenance and Troubleshooting
A. Transducer and Cable
Check the cable for cuts or punctures. Check if the connectors are on tightly. If the T-Mike E always indicates an
echo when the transducer is connected, look for a piece of metal jammed in the cross talk barrier of the
transducer. The cross talk barrier is the line separating the two halves of the transducer.
B. Optional NiCad Battery
NiCad batteries have a “memory” that destroys their capacity if the battery is not cycled. Do not constantly charge
the T-Mike E. Maximum battery life is obtained by discharging the battery through normal use before recharging.If
you operate the T-Mike E beyond the flashing display warning to the point below the minimum acceptable battery
voltage the T-Mike E will automatically shut off and will not restart until the charger is connected or batteries are
replaced. Data will be retained for approximately four hours, so replace the battery pack as soon as possible.
C. Keypad
The keypad is a matrix type switch. Due to physical damage or excessive wear, one key may remain struck closed
or one entire row or column may cease to function. The keypad is easily field replaceable as a spare part.
D. Display
The LCD is made of glass and is one of the most fragile components of the T-Mike E. It may break if dropped. This
LCD must be replaced by a factory trained technician. DO NOT clean the surface of the display with any solvents or
abrasives.
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