Uniden Clock User Manual

Digital Depth Sounder  
OPERATING GUIDE  
Contents  
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Installing the QT 206. . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Transducer Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Power Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Installing The Transducer. . . . . . . . . . . . . . . . . . . . . . . 5  
Transom Mount Transducers . . . . . . . . . . . . . . . . . . . . . 5  
Through-the-hull Transducers . . . . . . . . . . . . . . . . . . . . 8  
Low Profile Transducers . . . . . . . . . . . . . . . . . . . . . . . 9  
Stem-type (power Boat Bronze) Transducers . . . . . . . . . . . . 10  
Inside-the-hull Transducers . . . . . . . . . . . . . . . . . . . . . 12  
Understanding Sonar . . . . . . . . . . . . . . . . . . . . . . . . 14  
Air Echoes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Setting The Shallow Water Alarm . . . . . . . . . . . . . . . . . . 15  
Shallow Water Sensitivity . . . . . . . . . . . . . . . . . . . . . . 16  
When to Use Less Sensitivity . . . . . . . . . . . . . . . . . . . . 17  
When to Use More Sensitivity . . . . . . . . . . . . . . . . . . . . 18  
Troubleshooting Guideline . . . . . . . . . . . . . . . . . . . . . 19  
Features, Specifications, and availability of Optional Accessories are all  
subject to change without notice.  
1
UNPACKING  
Your QT-206 Depth Sounder box should contain the following items:  
Transducer with 3 lugs attached  
Power Cable (attached to the gauge)  
Mounting Bracket and hardware  
This Operating Guide  
If any items are missing or damaged, please contact your dealer  
immediately.  
FEATURES  
Depth Readings – The QT-206 is designed to give depth readings  
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from 2.5 feet to a maximum depth of 199 feet. Depth readings are in  
1/10 foot increments from 2.0 feet to 15 feet, and are shown as whole  
numbers up to 199 feet. These readings are displayed on a large  
Liquid Crystal Display (LCD).  
Night Viewing – The QT-206 is back lit at all times with a soft  
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glowing lamp designed to help your night time navigational needs.  
2
INSTALLING THE QT-206  
1. Find a location on your dash panel which will provide clear viewing  
and access to the LCD window.  
2. After finding the right location for the indicator unit, mark a 2-inch  
hole to be cut out.  
3. Check behind the panel for any cables or wiring which could be  
damaged. Then cut out the 2-inch hole.  
4. Test fit the unit in the hole, and make any adjustments with your  
saw or drill.  
5. Extending out of the back of the instrument is a brass shaft. Attach  
the U-shaped mounting bracket over this shaft, and place the  
washer on the shaft. Thread the nut onto the shaft until the  
U-shaped bracket is firmly against the back of the dash panel.  
6. Look at the front of the instrument to ensure that it is aligned  
properly. Then tighten securely.  
1/2"  
BRASS STUD  
P/N: 210-005  
Less  
Shallow  
Sensitivity  
More  
2"  
2 3/8"  
X-ducer  
2 1/2"  
Red Black  
Shield  
Power  
NUT  
P/N: 3203-009  
Alarm  
+
MOUNTING BRACKET  
P/N: 950-025  
WASHER  
P/N: 308-029  
3
TRANSDUCER WIRING  
On the rear of the unit, locate the terminal lugs extending out of the rear  
of the instrument. These terminals are used to connect the transducer  
wires.  
When shipped from the factory, the transducer is wired with 3 female  
lugs attached. These lugs need to be inserted onto the male terminals  
located on the rear of the gauge.  
The BLACK terminal is connected to the BLACK wire. The WHITE  
terminal may be connected to either the RED, BLUE, or WHITE wire.  
Connect the shield to the position marked “SHIELD”.  
SHIELD  
BLACK  
RED, BLUE, OR WHITE  
If you need these female lugs, contact your Uniden Marine dealer.  
POWER CABLE WIRING  
Because the QT-206 has no ON/OFF switch, you will need to wire it  
directly to a power source which will turn the unit on as power is applied.  
It may be convenient to wire the power cable directly to the Ignition  
Switch so that when you turn the boat on, the depth sounder immediately  
starts working. Some boats have already been prewired and labeled for  
a depth sounder so that when the switch is turned ON, the depth  
sounder receives power.  
Another method for cable wiring is as follows:  
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1. Connect the main unit to a 12-volt battery using the power cable  
supplied with your unit. You may extend this cable as necessary,  
but you must observe proper polarity (i.e., RED is positive and  
BLACK is negative).  
2.  
3.  
Connect the BLACK wire to the negative (-) battery terminal.  
Connect the RED wire to the positive (+) battery terminal.  
4. Make sure the connections are clean and tight so they do not  
vibrate loose during the boat’s operation. Occasionally clean any  
accumulated corrosion from the battery terminals.  
5. If for some reason the fuse is blown, replace with a 1 amp fuse,  
normal blow.  
DO NOT OVER FUSE! The unit consumes 0.25 amps of current when it  
is on. You will want to keep your battery fully charged.  
INSTALLING THE TRANSDUCER  
The three most popular transducer styles are:  
TRANSOM MOUNT – Ideal on boats with outboard engines, or on  
I/O driven boats.  
THROUGH-THE-HULL – Ideal for boats with Inboard engine(s).  
INSIDE-THE-HULL – Often called “Shoot Through Transducer”; it  
can be used effectively if installation procedures are followed  
carefully.  
TRANSOM MOUNT TRANSDUCERS  
Selecting An Installation Location  
Mount the transducer fairly close to the centerline (keel) of the boat,  
which will ensure minimum potential aeration over the acoustic window  
of the transducer. On twin drive installations, install the transducer  
between the drives.  
On single drive installations, you should mount the transducer bracket on  
the side of the boat where the propeller blade is rotating downwards.  
This is usually the right (starboard) side. If possible, do not mount the  
5
transducer directly behind any strakes, ribs, intakes and outlets for live  
wells and/or engine cooling water, or any protrusion which may cause  
turbulence or cavitation. On slower, heavier displacement boats, good  
results can be achieved further from the keel.  
FIBERGLASS V-HULL BOATS—TWIN ENGINE  
(MODERATE TO DEEP-VEE DEADRISE ANGLE)  
FIBERGLASS V-HULL MODERATE TO  
LARGE DEADRISE  
TRANSDUCER IS BELOW  
STRAIGHT LINE  
EXTENSION OF HULL.  
HULL  
DO NOT INSTALL YOUR TRANSDUCER UNDERNEATH A GASOLINE  
OVERFLOW. THIS WILL DESTROY THE PLASTIC MATERIAL OF  
THE TRANSDUCER AND THE BRACKET. THIS DAMAGE IS NOT  
®
COVERED UNDER WARRANTY. Also, do not use LOCKTITE or any  
other solvents on the mounting hardware or transducer. These materials  
may destroy the transducer.  
Mounting The Transducer  
The transducer and bracket assembly should be oriented vertically with  
respect to the water to yield a vertically-directed acoustic beam.  
1. Attach the transducer to the bracket as shown below.  
2. Place transducer and bracket at the selected location on the boat  
transom. Align the bracket so that the bottom surface of the  
transducer is even with the underside of the boat.  
FIBERGLASS V-HULL BOATS—TWIN ENGINE  
(MODERATE TO DEEP-VEE DEADRISE ANGLE)  
INSTALL BETWEEN DRIVES—MODERATE TO  
DEEP-VEE DEADRISE ANGLE  
HULL  
WEDGE POINTING FORWARD  
DEADRISE ANGLE  
(Install between drives)  
6
3. Mark the outline of each slot on the hull. Mark the screw locations  
1/8" from the bottom of each slot, and drill four holes 3/4" deep with  
a 9/64" drill. The slots in the bracket allow 5/8" of vertical  
adjustment which can be utilized to lower the transducer further  
into the water to achieve optimal performance.  
4. Using the sheet metal screws provided, attach and tighten the  
bracket to the hull so that the transducer projects 1/8" below the  
underside of the hull. A marine sealant such as RTV should be  
applied to the threads of the screws to prevent water seepage into  
the transom. Align the transducer so that the rear is 1/16 to 1/8"  
lower than the forward point (bow). Tighten all bolts and screws.  
5. Route the cable to the QT-206, being careful not to tear the cable  
jacket. Make sure the cable is separated from the ignition,  
tachometer, alternator, or other electrical wiring. Do not remove  
the connector or splice or shorten the cable, as this will void the  
transducer warranty.  
Transducer Replacement/Identification Tag  
On most transducers manufactured after 1987, the operating frequency  
and part number is attached to the cable or is printed on a mylar tag near  
the connector end. Do not remove this tag since it identifies the  
transducer and will help you identify the operating frequency of the  
transducer. The QT-206 operates at 200 kHz. (Incorrect frequency will  
cause your instrument to operate improperly.)  
Transducer Wetting  
Immediately before launching your vessel, thoroughly wipe the face  
of the transducer with a detergent type liquid soap. This reduces the  
amount of time required for the transducer to establish good contact with  
the water. If this procedure is not followed, it may take several days for  
the complete “wetting” to occur, resulting in reduced performance of the  
instrument.  
Transducer Painting  
If a vessel is kept in saltwater, especially in the southern U.S., marine  
growth can accumulate rapidly on the transducer face and seriously  
reduce performance. If fouling does occur, use a stiff brush or putty knife  
to remove this growth. Wet sanding of the fouled transducer face is  
permissible with #220 or finer grade of wet or dry emery paper. (Use  
plenty of water.) Coating transducers with anti-fouling paint is often  
necessary to achieve consistent performance. All anti-fouling paints  
7
have a solvent base. However, some solvent bases will damage  
encapsulation materials and plastics to varying degrees. If you need  
anti-fouling protection, use only paints with a mineral spirits base; do  
not use acetone vinyl-based paints. Glochester (RULE) Durapoxy is a  
hard, mineral spirits-based paint that has been found to be virtually  
transparent to acoustic energy. Never apply paint to the transducer by  
spraying; use a brush or roller. A sprayed surface “wets” very slowly,  
and there are often microscopic air pockets under the surface which  
attenuate the sound energy.  
THROUGH-THE-HULL TRANSDUCERS  
The two most popular styles of Through-the-Hull Transducers produced  
are low profile types, which typically are 1-3/4" or 2" in diameter, or  
stem-type transducers, which typically have a 3/4" pipe thread and  
require a fairing block to level. The two most popular materials used are  
nylon and bronze. Choice of material depends upon the boat  
construction:  
Wooden boats require the use of a bronze transducer or bronze  
fittings because when the boat is out of the water, the wood will  
dry out. When the fitting is installed and the boat is returned to  
the water, the wood will swell and possibly crack a nylon type of  
transducer. Therefore, bronze is recommended for all wooden  
boat applications.  
Larger fiberglass boat manufacturers often request bronze  
transducers and fittings due to the size of the boat and the total  
number of fittings used in the installation. However, nylon  
transducers are better suited for this application because of their  
ease of installation, lower cost, and more complete seal to the  
fiberglass hull.  
Selecting an Installation Location  
The mounting location must provide a smooth flow of water over the face  
of the transmitting surface of the transducer. Bubbles will cause the  
instrument to read improperly and cause erroneous readings. The  
mounting location should have reasonable access from inside the vessel  
since the transducer will require tightening from inside the hull.  
On sailboats, mount the transducer where the acoustic beam will  
not be shaded by the keel. A spot forward of a fin keel with a  
minimum deadrise angle is preferred.  
On planing powerboats, locate the transducer off centerline 6" to  
12" and before the first lifting strake (flat area).  
8
Do not install it on a lifting strake since this is the area where air  
bubbles travel from the bow to the stern, to provide a smooth ride.  
On displacement power boats (trawlers), mount the transducer  
well aft and close to the centerline.  
On I/Os, mount the transducer close to the engine(s).  
On inboards, always mount the transducer well ahead of the  
propeller(s), and shafts.  
IMPORTANT  
Never mount a transducer in direct line or within 4 feet behind another  
through-hull fitting, the keel or rudder, zinc anodes, or other  
projections that would cause turbulence around the transducer when  
the boat is underway.  
LOW PROFILE TRANSDUCERS  
The low profile style of transducer is ideal for high speed sport boats and  
sailboats. This style of transducer is designed to be mounted flush  
against the hull without a fairing or leveling block. The hull deadrise  
angle must not exceed 10° in order to use this transducer fitting.  
Mounting the Transducer  
1. Drill a 1/8" pilot hole in the preferred transducer location.  
2. Drill a 1-3/4" or 2" hole through the hull using the pilot hole as a  
guide.  
3. Have some type of soft backing plate or thin piece of plywood  
(3-1/2" x 3-1/2" x 1/4" thick) available to strengthen the inside of the  
hull around where the hole was drilled. This serves the dual  
purpose of allowing the transducer to conform to the inside of the  
hull while preventing the transducer lock nut from unwinding. If you  
have a plastic housing, do not use wood shim. Use a fiberglass,  
plastic, or brass washer instead.  
4. Route the transducer cable through the hole in the hull.  
IMPORTANT  
Do not pull on the cable as this may cause internal damage to the  
transducer by causing an internal wiring short.  
9
5. Apply a 1/8" thick layer of sealant around the lip of the plastic or  
bronze housing. A thin layer should also be applied up the  
sidewalls to a height of 1/4" greater than the hull thickness. This  
will ensure there is sealant material in the threads to seal them,  
and hold the housing nut securely in place.  
6. From the outside of the hull, push the housing (with sealant  
applied) into the drilled hole. Apply a twisting motion to the housing  
to squeeze out excess sealant.  
GASKET  
(OR RUBBER)  
HULL  
SEALANT  
7. Put the nut on the transducer from the inside of the hull. If nylon,  
hand tighten only.  
8. Clean off any excess sealant from around the transducer.  
STEM-TYPE (POWER BOAT BRONZE) TRANSDUCERS  
The stem-type transducer is popular as a replacement transducer since it  
was the primary style used on older boats. The stem will fit the same  
size hole as a previously defective or obsolete transducer. Also, if your  
hull has a steep dead rise, the stem-type transducer will be best suited  
for your application. However, because of the smaller diameter shaft  
going through the hull, a fairing block should be used so that the  
transducer can be oriented straight up and down. Fairing blocks are best  
made out of hard wood such as oak. The shape of the block will be  
determined by the shape of your hull and the style of transducer you  
choose.  
10  
3/4"  
PIPE  
THREAD  
FAIRING  
BLOCK  
4"  
HULL  
1 1/4 "  
3"  
Mounting the Transducer  
1. Drill a 1/8" pilot hole in the preferred transducer location. Refer to  
the previous section to determine the best location for your type of  
boat.  
2. Drill a hole “slightly” larger than the stem of the transducer. Be  
careful not to make it too large as you will run the risk of water  
leaking into the hull.  
3. Cut the fairing block to the shape of your hull and insert the cable  
and stem of the transducer through half of the fairing block.  
4. Apply a good grade of underwater marine sealant (polysulfide  
compound) to the flange on the transducer and to the surface of  
the leveling block where the block touches the outside of the hull.  
Apply enough sealant so that it beads out around the transducer as  
you tighten the transducer nut.  
5. Put the remaining half of the fairing block on the inside, over the  
transducer, along with sealant next to the hull. Tighten lightly with  
a wrench.  
6. Clean off the excess sealant from around the transducer.  
IMPORTANT  
After launching the boat, be certain to check the transducer location  
for leaks.  
11  
INSIDE-THE-HULL TRANSDUCERS  
This type of transducer does not require the drilling of a hole as does the  
Through-the-Hull Transducer. However, since the sound waves  
transmitted and received by the Inside-the-Hull Transducer must pass  
through the hull, transducer performance will be reduced. The success  
of Inside-the-Hull installation is greatly dependent upon the purity of the  
hull directly below the transducer and the type of hull. Inside-the-Hull  
mounting should not be used on aluminum hulls, balsa core hulls,  
wooden hulls, or hulls where the deadrise angle is more than 15°.  
To reduce sound transmission losses, the adhesive used to bond the  
transducer to the hull should conduct sound at speeds close to that of  
the plastic or epoxy face of the transducer and the polyester resin of the  
hull. Epoxy adhesives, as opposed to silicone, are recommended.  
Note: When performing an Inside-the-Hull installation, you must use  
a special Inside-the-Hull Transducer since it contains a  
transducer crystal which is wider in diameter, and is designed  
to transmit the pulse through the hull. Do not attempt to use  
a Transom Mount Transducer, as the crystal is too small to  
ensure optimum instrument results.  
Selecting an Installation Location  
The transducer should be located where the hull laminate is dense and  
has no entrapped air. Generally, best operation is obtained by mounting  
the Inside-the-Hull Transducer on the centerline of the hull, as it allows a  
flat, horizontal mounting area for vertical orientation of the sonic beam.  
Do not choose an area above a lifting strake, as air travels underneath  
the hull here and could cause erroneous readings.  
On sailboats, mount the transducer near the centerline and  
forward of the leading edge of the keel.  
On power boats, mount the transducer as far aft as practical.  
On I/Os, mount in a spot near the engine.  
On inboards, locate the transducer forward of the prop(s), where it  
will not be shaded by prop shafts.  
12  
Use one of the following methods to determine if your chosen location is  
satisfactory:  
1. Place the transducer in a plastic bag filled 1/2 to 3/4 full of water.  
Tie or tape the bag tightly around the transducer cable. Wet the  
selected location and place the bag against the hull, pressing the  
transducer face against the hull. If the hull is void free at this point,  
the depth sounder should now operate.  
2. Coat the face of the transducer with silicone grease or petroleum  
jelly. Then press with a twisting motion against the hull. If the hull  
is void free at this point, the depth sounder should now operate.  
Mounting the Transducer  
1. If the interior surface of the hull at the selected spot has a rough  
pattern, grind it with a disc sander until smooth. Any grease or oil  
on the surface must be removed.  
2. Mix the two-part epoxy supplied with the transducer for at least 3  
minutes. If this is not done, proper bonding of the transducer to the  
hull will not occur and false readings can occur. The working time  
of the epoxy is 5 minutes. The hull temperature must be 60° or  
higher for the epoxy to bond sufficiently.  
3. Apply the mixture to the clean location on the hull and to the face of  
the transducer in a small amount.  
4. Press the face of the transducer into the spot of epoxy. To remove  
any air bubbles, slowly rotate in one direction only, until the  
transducer is physically against the hull or within 1/4" of the hull.  
INSIDE THE HULL  
THIN LAYER OF  
2-PART EPOXY  
HULL  
No more than 15 Degrees  
When the epoxy has cured, it should be permanently bonded to the hull  
and hard to the touch. Test the epoxy which extends out of the  
underside of the transducer with a screwdriver to ensure that it can’t be  
dented, and that it is completely hard. Epoxy which is not hardened will  
eventually cause improper readings.  
13  
UNDERSTANDING SONAR  
All depth sounders emit ultrasonic sound signals from the transducer into  
the water located under your boat. These sound signals travel through  
the water at a rate of approximately 4,800 feet per second (1500 meters  
per second). The depth sounder transmits a signal and receives a  
returning echo. The unit calculates the amount of time in microseconds  
that elapsed while the signal traveled down to the bottom and returned  
back to the transducer. This time is then converted to depth and  
displayed on the screen.  
It may help to understand these sound signals traveling between the  
transducer and the bottom by imagining a ping-pong ball bouncing up  
and down from the floor. The closer the ball is to the floor, the less time  
it takes for it to return. The higher the ball is bounced, the longer it takes  
to return. Bouncing the ball off a hard surface such as cement is the  
same as bouncing a signal off a sandy or hard bottom. Bouncing this  
same ball off carpeting creates a totally different effect because the ball  
returns with less force. The same principle applies to an echo bouncing  
off a muddy or grassy bottom, causing the echoes to be weaker.  
AIR ECHOES  
Air echoes can be caused by excessive turbulence under the face of the  
transducer. Ultrasonic signals from a transducer will not penetrate air.  
They react to air in the same manner as they react to a hard bottom  
described above. Therefore, if your transducer is not mounted properly  
and you are getting turbulence (air bubbles) under your transducer, you  
may get false readings. This is simply because signals are being  
returned by the turbulence and are never reaching the bottom.  
14  
SETTING THE SHALLOW WATER ALARM  
Located just below the LCD window are two keys labeled “DOWN” and  
“UP” Alarms. These keys are used to set the Shallow Water depth alarm  
so that it will audibly alert you if you enter water shallower than your  
preset depth alarm.  
To set the alarm, press the “DOWN” key. The LCD shows an alarm  
depth of A03. Pressing the “DOWN” continuously cycles the alarm  
setting deeper by one foot increments from A03 through A10 (for  
example: 3, 4, 5, 6, 7, 8, 9, 10). After A10, the alarm settings are by  
2-foot increments (for example: 10, 12, 14, 16, 18, 20 feet). The alarm  
settings jump by 5-foot increments (for example: A20, A25, A30).  
When you see a digital readout proceeded by an “A”, this is your ALARM  
setting. This number appears in the display window immediately after  
you press either alarm key and then will disappear after several seconds.  
This number remains in the unit’s memory until power is turned off.  
To decrease the alarm setting, press the “UP” key. The display will show  
these numbers in decreasing value so that the alarm is shallower.  
Several seconds after you press either the “UP” or “DOWN” keys, the  
instrument displays the actual depth reading. A00 indicates the alarm is  
off.  
15  
SHALLOW WATER SENSITIVITY  
The Shallow Water Sensitivity controls a circuit in the depth sounder that  
affects the first 10 feet of water. It alters the system’s response time in  
this area only, and can be used to compensate for installation  
imperfections.  
Example:  
SHALLOW READINGS: If your instrument occasionally displays  
random, false shallow readings such as 3.1’, 2.8’, and 4.3’, you  
may need to adjust this control.  
DEEPER READINGS: If your unit is reading false echoes which  
are deeper than the actual depth, you may not have enough  
sensitivity, which can also be corrected by using this control.  
“0.0” READINGS: Adjusting this control too far in either direction  
could affect your readings. For example, if the adjustment is at an  
extreme, it could actually cause the unit to give a “0.0” reading at  
a deeper depth. The true depth could be 30 feet, and if the  
control is too far counterclockwise, the readout could be “0.0”.  
This adjustment fine tunes the installation of your gauge to the location of  
the transducer on your boat and to the waters where you do your  
boating. It is typically an adjustment that is made by the boat owner  
since it is performed while the boat is in the water.  
Each depth gauge is tested at the factory with a transducer located in a  
water tank. The Shallow Water Sensitivity is then factory preset.  
However, after installation for your local waterways, you may need to  
perform this minor adjustment so that the depth gauge operates at its  
maximum potential on your boat.  
With Inside-the-Hull Transducer installations, it is especially important  
to perform this adjustment. It is impossible to control the many types of  
hull configurations on the many varieties of boats available today. Since  
fiberglass hulls are generally hand-layered, the hull thickness can vary  
from boat-to-boat even though they may be the same model. Thickness  
of the fiberglass combined with the many types of bottom conditions  
(sandy, rocky, muddy) can affect the readings on your digital depth  
sounder. This control enables you to tune your gauge more precisely so  
that the unit reads properly. Unless major changes take place in your  
boating environment, you should not need to adjust this setting again.  
16  
WHEN TO USE LESS SENSITIVITY:  
SHALLOW READINGS  
Use less sensitivity when your instrument displays a series of random,  
shallow readings (3.5’, 2.9’, 4.1’) and the actual depth is greater.  
How to Perform  
When looking at the rear of the instrument, this adjustment is made in a  
clockwise direction. (This control operates much like the volume control  
on a radio. If you turn it all the way down, you cannot hear the music.  
Turning it up too far makes the music blare and sound out of tune.)  
Turning the sensitivity control too much can actually “squelch” out the  
transmit pulses and the return echoes. This will result in a “0.0" reading  
in the display window.  
Note: When making this adjustment, turn the control no more than  
1/16th of a turn at a time. Then wait 3 to 4 seconds before  
making the next adjustment turn.  
17  
WHEN TO USE MORE SENSITIVITY:  
DOUBLE ECHOES (READINGS TOO DEEP)  
Use more sensitivity when your instrument displays depths that are too  
deep; that is, greater than the actual depth. For example, if you are in 6’  
of water and turn this control too far in the less sensitivity direction, you  
may see “12.0’” appear in the LCD window. This is very dangerous  
since you will actually be operating the boat in shallower water than what  
is displayed. Caution should be exercised to locate the Sensitivity  
Control somewhere between both ends of the rotation.  
How To Perform  
By rotating the control in a counterclockwise direction (when looking at  
the rear of the instrument), you can increase the sensitivity of the gauge  
to the first 10 feet of water. Increasing this adjustment too much in the  
MORE SENSITIVITY direction can cause a “doubling” of the actual  
depth.  
Note: When making this adjustment, turn the control no more than  
1/16th of a turn at a time. Then wait 3 to 4 seconds before  
making the next adjustment turn.  
18  
TROUBLESHOOTING GUIDELINE  
Symptom  
Possible Reasons  
Suggested Solutions  
“0.0" is flashing in the  
display window.  
Unit is not receiving an Correctly adjust the  
echo which could be  
caused by a variety of  
reasons:  
Sensitivity Control so  
that the numbers in the  
display window start to  
appear and are reading  
the correct depth.  
Sensitivity Adjustment  
was turned too much in  
one direction, actually  
Try a “known good”  
squelching out the echo. transducer hooked up to  
the gauge and see if the  
Transducer is defective, depth appears in the  
therefore not transmit- window. It is important  
ting or receiving echoes. to “wet” the transducer  
immediately before im-  
Installation of the trans- mersing in the water.  
ducer is incorrect,  
therefore not allowing a Make sure that the  
pulse to be transmitted transducer is installed  
or received.  
per the instructions in  
this manual. Inside-  
Unit is defective and  
needs to be returned to the-Hull Transducers  
the factory for repair.  
must be properly  
bonded and attached to  
the hull as described in  
the section on Inside-  
the-Hull mounting, or  
must be properly in-  
stalled by the boat  
manufacturer if the  
equipment was installed  
at the boat factory.  
If all of the above tests  
resulted in “0.0" remain-  
ing in the window, return  
the unit for repair.  
Unit is showing “88.8" A logic circuit failure  
Return unit to the fac-  
tory for repair.  
in the display window.  
probably caused by a  
poor solder connection,  
lack of solder, or im-  
proper wiring.  
19  
Symptom  
Possible Reasons  
Suggested Solutions  
Unit is not reading prop- There are three basic  
Refer to the pages in  
this manual along with  
the drawings for your  
particular boat on the  
erly at high speeds,  
causing high random  
types of installations:  
Inside-the-Hull,  
numbers at high RPM. Through-the-Hull, and  
Transom Mount. Gen- proper installation tech-  
erally, 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 inhib-  
iting the unit from re-  
ceiving the correct  
nique.  
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.  
bottom reading.  
Cavitation (locked on  
bubbles) either on the  
face of the transducer or  
on the underbelly of the  
boat is preventing the  
unit from displaying the  
true depth.  
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.  
Transom Mount Trans- This occurs if the trans- Transducer may be per-  
ducer is breaking where ducer is installed under manently damaged and  
the mounting bracket at- a gasoline overflow vent is non repairable. Be-  
taches to the trans-  
ducer.  
OR if an adhesive such fore installing a replace-  
as LOCKTITE® was ment -transducer, be  
used to bond the hard- sure to move the  
ware onto the trans-  
bracket.  
ducer mounting bracket.  
The adhesive or gaso-  
line has eaten into the  
plastic and cannot be  
repaired.  
A30 or A00 reads out  
A lug from a transducer Unfortunately, perma-  
nent damage has been  
permanently on the dis- wire was accidentally  
play.  
connected to either the done to the main sur-  
Alarm Up/Down terminal face mount “chip”. The  
and power was applied. instrument head only  
must be returned for re-  
pair.  
20  
One Year Limited Warranty  
WARRANTOR: UNIDEN AMERICA CORPORATION (“Uniden”)  
ELEMENTS OF WARRANTY: Uniden warrants, for one year, to the original  
retail owner, this Uniden Product to be free from defects in materials and  
craftsmanship with only the limitations or exclusions set out below.  
WARRANTY DURATION: This warranty to the original user shall terminate and  
be of no further effect 12 months after the date of original retail sale. The  
warranty is invalid if the Product is (A) damaged or not maintained as  
reasonable or necessary, (B) modified, altered, or used as part of any  
conversion kits, subassemblies, or any configurations not sold by Uniden, (C)  
improperly installed, (D) serviced or repaired by someone other than an  
authorized Uniden service center for a defect or malfunction covered by this  
warranty, (E) used in any conjunction with equipment or parts or as part of any  
system not manufactured by Uniden, or (F) installed or programmed by anyone  
other than as detailed by the Operating Guide for this product.  
STATEMENT OF REMEDY: In the event that the product does not conform to  
this warranty at any time while this warranty is in effect, warrantor will repair the  
defect and return it to you without charge for parts, service, or any other cost  
(except shipping and handling) incurred by warrantor or its representatives in  
connection with the performance of this warranty. THE LIMITED WARRANTY  
SET FORTH ABOVE IS THE SOLE AND ENTIRE WARRANTY PERTAINING  
TO THE PRODUCT AND IS IN LIEU OF AND EXCLUDES ALL OTHER  
WARRANTIES OF ANY NATURE WHATSOEVER, WHETHER EXPRESS,  
IMPLIED OR ARISING BY OPERATION OF LAW, INCLUDING, BUT NOT  
LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR  
FITNESS FOR A PARTICULAR PURPOSE. THIS WARRANTY DOES NOT  
COVER OR PROVIDE FOR THE REIMBURSEMENT OR PAYMENT OF  
INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow  
this exclusion or limitation of incidental or consequential damages so the above  
limitation or exclusion may not apply to you.  
LEGAL REMEDIES: This warranty gives you specific legal rights, and you may  
also have other rights which vary from state to state. This warranty is void  
outside the United States of America.  
PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY: If, after  
following the instructions in this Operating Guide you are certain that the  
Product is defective, pack the Product carefully (preferably in its original  
packaging). Include evidence of original purchase and a note describing the  
defect that has caused you to return it. The Product should be shipped freight  
prepaid, by traceable means, or delivered, to warrantor at:  
Uniden America Corporation  
Parts and Service Division  
4700 Amon Carter Blvd.  
Ft. Worth, TX 76155  
(800) 586-0409, 8 a.m. to 5 p.m. Central, Monday through Friday  
©1995,1996 Uniden America Corporation  
Printed in the United States of America  
All rights reserved.  
OMQT206  

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