Vexilar LC-507 - Manual (Page 29)

29
Possible Cause
TROUBLE SHOOTING
Unit is turned on, but there is no
display. Contrast is adjusted too low.
Increase contrast.
Unit will not turn on. Check for proper battery polar-
ity and that you have fully
charged, working batteries.
Unit runs well for a short time,
then the unit quits. Bad battery. Voltage may be
good when checked, but may
fall as it is loaded.
Unit runs and shows display
light, but does not read depth. Transducer is not plugged in or
not in contact with the water.
Unit works, but needs high gain
to see bottom or targets. Transducer is not aimed cor-
rectly or needs to be cleaned.
Unit works, but has too many
lines on the display. Can't tell
what is what. Many air bubbles or very small
targets in the water. Electrical
noise from another device.
Unit works well when sitting
still or at slow trolling speeds,
but loses reading when the boat
speeds up. Improper transducer installation
or adjustment. There is a loss of
clear water flow across the face
of the transducer when the boat
reaches a certain speed.
Unit works, but shows noise
when the engine is started or the
electric trolling motor is turned
on. Improper ground or missing
ground in electrical system.
Defective engine or trolling
motor.
Temperature does not show or
is not accurate. Temp sensor is not plugged in
or is not in the water.
Symptom
If this trouble shooting guide does not help, please
contact our customer service department. Contact infor-
mation is on page 33.
Speed indicated does not show
or is not accurate. Speed is not turned on in
menu. SPEED-PULSE feature
needs calibrating (contact cus-
tomer service)