Uniden LTD260 English Owners Manual - Page 14

General Operation

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LTD260.qxd 12/15/98 8:24 AM Page 14 TROUBLESHOOTING: GENERAL OPERATION SYMPTOM: CHECK: Unit does not turn on at all. No beep, no display. Make sure the unit is actually receiving power. Check the inline fuse, and the circuit breaker panel on the boat. Make certain the unit is receiving 11 to 16 colts of CLEAN DC. Make sure the DC polarity has not been reversed. Check for corrosion on the power connector, and clean if necessary. SYMPTOM: "0.0" FLASHING in display window. POSSIBLE REASON: The unit is not receiving an echo which could be caused by a variety of reasons. 1. As previously described, this could mean that the Sensitivity Adjustment was turned too much in one direction, actually squelching out the echo. 2. The transducer could be defective, therefore, not transmitting or receiving echoes. 3. The installation of the transducer could be incorrect, thereby not allowing a pulse to be transmitted or received. 4. The unit could be defective and need to be returned to the factory for repair. HOW TO SOLVE: 1. Correctly adjust the Sensitivity Control so that the number in the display window start to appear and are reading the correct depth. 2. Try a "known good" transducer hooked up to the gauge and see if the depth appears in the window. It is important to "wet" the transducer immediately before immersing in the water. 3. Check to insure that the transducer is installed as per the instructions in this manual. Inside the hull transducers must be properly bonded and attached to the hull as described in the section on inside the hull mounting or must be properly installed by the Boat Manufacturer if the equipment was installed at the boat factory. 4. If all of the above tests resulted in "0.0" remaining in the window, return the unit for repair. SYMPTOM: Unit not reading properly at high speeds, causing high random numbers at high RPM's. REASON: There are three basic types of installations: inside the hull, through the hull, and transom mount. Generally, this situation is attributed to the location and installation of the transducer. A great deal of air is flowing over the face of the transducer and is inhibiting the unit from receiving the correct bottom reading. Cavitation (locked on bubbles) either on the face of the transducer of on the under belly of the boat are preventing the unit from displaying the true depth. HOW TO SOLVE: Refer to the pages in this manual, along with the drawings for your particular boat on the proper installation technique. If this is a transom mount transducer, it may require that the transducer be adjusted lower in the bracket so that it extends further under the bottom of the boat and is allowed a clean flow of water. It could also require that the transducer and/or bracket be relocated to achieve a clean, smooth flow of water over the face of the transducer. 14

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SYMPTOM:
Unit does not turn on at all. No beep, no display.
CHECK:
Make sure the unit is actually receiving power. Check the inline fuse, and the
circuit breaker panel on the boat. Make certain the unit is receiving 11 to 16
colts of CLEAN DC. Make sure the DC polarity has not been reversed. Check
for corrosion on the power connector, and clean if necessary.
SYMPTOM:
“0.0” FLASHING in display window.
POSSIBLE REASON
: The unit is not receiving an echo which could be caused by a variety of
reasons.
1.
As previously described, this could mean that the Sensitivity Adjustment was turned too
much in one direction, actually squelching out the echo.
2.
The transducer could be defective, therefore, not transmitting or receiving echoes.
3.
The installation of the transducer could be incorrect, thereby not allowing a pulse to be
transmitted or received.
4.
The unit could be defective and need to be returned to the factory for repair.
HOW TO SOLVE:
1.
Correctly adjust the Sensitivity Control so that the number in the display window start to
appear and are reading the correct depth.
2.
Try a “known good” transducer hooked up to the gauge and see if the depth appears in the
window. It is important to “wet” the transducer immediately before immersing in the water.
3.
Check to insure that the transducer is installed as per the instructions in this manual. Inside
the hull transducers must be properly bonded and attached to the hull as described in the
section on inside the hull mounting or must be properly installed by the Boat Manufacturer if
the equipment was installed at the boat factory.
4.
If all of the above tests resulted in “0.0” remaining in the window, return the unit for repair.
SYMPTOM:
Unit not reading properly at high speeds, causing high random numbers at high
RPM’s.
REASON:
There are three basic types of installations: inside the hull, through the hull, and
transom mount. Generally, this situation is attributed to the location and installation of the
transducer. A great deal of air is flowing over the face of the transducer and is inhibiting the unit
from receiving the correct bottom reading. Cavitation (locked on bubbles) either on the face of the
transducer of on the under belly of the boat are preventing the unit from displaying the true depth.
HOW TO SOLVE:
Refer to the pages in this manual, along with the drawings for your particular
boat on the proper installation technique. If this is a transom mount transducer, it may require that
the transducer be adjusted lower in the bracket so that it extends further under the bottom of the
boat and is allowed a clean flow of water. It could also require that the transducer and/or bracket
be relocated to achieve a clean, smooth flow of water over the face of the transducer.
TROUBLESHOOTING:
GENERAL OPERATION
14
LTD260.qxd
12/15/98
8:24 AM
Page 14