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Tech Support FAQOur technical support department (201-641-1200) receives many questions, both from pilots and from shops, ranging from the simple to the abstruse. While many of these questions require research or highly technical answers, a few questions are asked repeatedly and have fairly simple answers. Here are some of them. Before calling tech support, please check this document! Questions:
How do I get into SETUP mode? In order to select GPS units or make other adjustments in the technical
operation of the Argus, you must enter SETUP mode. This Software version 1 and 2: Insert the "shorting
plug" and apply power. If you don't have the "shorting plug," see
below. Software version 1, 2, and 3: Press and HOLD the AUX button
for 10 seconds. After 5 seconds, the Argus will go into the AMEND mode.
CONTINUE HOLDING the button for another 5 seconds and the unit will go into SETUP.
(If you release the button during the 10-second period, you will have to start over.) For the changed settings to "take," you must EXIT the SETUP mode.
Regardless of software version, you can do so by pressing and holding AUX for at least one
second. If you change settings and then shut off power to the Argus without exiting,
the new settings will be lost. What does an ERROR CODE 5 mean? I just turned on my Argus and instead of a map, I get this message. The "Clock Failed Error Code 5" message means that the internal lithium battery in the Argus has died. This battery has a normal lifetime of 3-4 years. If you have an Argus unit with software version 1, 2, or 3, this is a "fatal error" in the sense that the Argus cannot operate until the battery is replaced. If you have software version 4, the Argus will operate without the battery, although clock functions will be lost. (Note this message doesn't apply to the Argus 3000 models, which have no internal clock. Color Argus units (software version 5 or greater) use different timekeeping hardware whose normal life should exceed 10 years.) If you have an Argus 5000 or 7000 with software version 3 or below, you MUST replace
the battery.
How do I replace the Argus battery? The battery is NOT a standard coin cell and must be wired into the Argus. Battery replacement is authorized by the Argus maintenance manual, which means it can be done by your avionics shop or, of course, by Eventide. Depending upon your location and time schedule, either procedure might be appropriate for you. The factory price of the battery is $50. We normally charge one-hour labor (which includes a final QC run) plus return shipping. It is unusual but not impossible that other problems or out-of-tolerance conditions may be found that will require additional time at the factory. We are REQUIRED to do this final QC step and checkout by FAA regulations. We can also do software upgrades and database updates while the unit is in the shop if you so desire. If you would prefer to have your shop exchange the battery, have them order the battery
from us. Labor charges in this case are between you and your avionics shop.
Your shop can also obtain an updated database for you.
How do I obtain a "Shorting Plug?" A shorting plug, necessary to access the SETUP mode in older Argus software versions, was shipped with each Argus that required one. They are small and tend to go missing. While you can order one from us, this is a common part and is not used in the Argus during flight. Therefore, a local replacement can be obtained and used legally. The plug is a common stereo "miniplug" such as those used on "Walkman" earphones and other consumer products. You must electrically connect the "tip" and the "ring" together without shorting either to the "sleeve." (If you look at the plug, this terminology will make perfect sense.) Note: Using a mono plug or one where the tip and ring are not properly connected
will normally give a Status Code 11 Error message. You might also get this message
if the plug or socket contacts are dirty. Usually removing and reinserting the plug
a few times will remedy the problem.
I can't find the correct SETUP entry for my GPS or other long range navigation unit. When Eventide releases new software, it has a SETUP entry for most popular GPS receivers. Obviously, however, there will be no specific setting for GPS receivers released after the software, and there may be no listing for uncommon receivers, e.g., variants with special suffix letters, or others of which we're not aware. In some cases, it may be possible to work around this problem without getting a software upgrade from Eventide; in other cases it won't be. Here are some things you can try:
Sometimes a workaround is a valid long-term solution. Frequently manufacturers
make no changes whatever in their data output when they release a new model.
However, we strongly recommend checking with the manufacturer of the GPS if you don't have
the correct, explicit setting in the Argus.
My Argus just came back from repair and no longer talks to my GPS (or HSI or ADF). For the Argus to work correctly, all the SETUP entries have to be correct. Argus
5000 and 7000 units with software versions 1, 2, and 3 critically depend upon the internal
battery for storage of these entries. If the battery was replaced or power was
interrupted for whatever reason during the repair process, these settings will have been
lost. Although it requires only a couple of minutes to restore the settings, unless
we have a record of them, we don't know to what they should be restored. Your
avionics shop will usually have this information at hand, or can recreate it with little
trouble. If you happen to be reading this while everything is working correctly, it
couldn't hurt to make a record of these settings and keep it with your aircraft records.
(We recommend this in our later instruction manuals as well.)
Is my <you name it> ADF or HSI compatible with the Argus 5000/7000? The Argus installation manual lists the ADF units and heading sources that we know are compatible with the Argus, and also lists some we know to be incompatible. If your unit is not on the list, it MAY be that it is compatible but that we know nothing about it. The Argus can accept inputs from ADF units with the following technical characteristics: AC Sin/Cos, DC Sin/Cos, DC+Sin/-Cos, AC Synchro. The Argus can accept inputs from heading sources using ARINC 407 synchro. This usually means that the heading indicator will have a "bootstrap" synchro attached to it. For heading and AC-type ADF units, an "excitation" signal of 24Volts at 400 Hz is also required. These are common requirements and are commonly available, but it is usually a matter
for your shop to determine what is available in your aircraft. Sometimes
information can be determined from the equipment listing in the POH. Most common,
modern systems are or can be made compatible with the Argus. The King KCS-55 system
and KR-87 ADF, as well as the Collins 650 and 650A, to name some of the most popular, are
in this category.
The Argus is connected to a heading source. Why do I only get TRACK instead of HDG on the map? There are two reasons why you might be showing TRACK instead of HEADING. One is that TRACK has been deliberately (or accidentally) selected under ORIENTATION in the AMEND mode. Go to the second AMEND page and select HEADING. The other possibility is that the heading received by the Argus is "flagged," i.e., indicated as invalid. There is an input pin that receives this signal, and the sense (high or low) is selected by software. If this signal is incorrect, regardless of the technical reason, the Argus will revert to showing TRACK. (If no TRACK information is available, the "NO HDG OR TRACK" message will be displayed.) One simple way to determine if the heading is flagged is to go into the SETUP mode and
change the sense of the signal. If HDG is then displayed, this is most likely the
problem. NOTE: This answer says nothing as to whether the heading information
is correct or not. That is a more complicated question and may be the subject of a
future troubleshooting guide.
My map is being oriented to heading, but heading is reading incorrectly If the Argus heading doesn't rotate with the mechanical heading indicator, but suddenly
flips 180 degrees as the compass is rotated, it usually indicates that one synchro phase
isn't connected. If there is a constant offset between the compass heading and the
Argus reading, it could mean that the bootstrap synchro is mechanically offset on its
shaft. An oscilloscope connected directly to the Argus pins is usually the best way
to troubleshoot heading problems.
If the excitation (reference) signal is not derived from the same source (frequency and
phase) as that which drives the bootstrap, the needle can rotate slowly or appear to jump
back and forth between 180 degree extremes. Again, an oscilloscope is useful in
troubleshooting this problem..
The Argus is showing a message beginning with "LRN" on the screen and no map. I don't even have a Loran! First, "LRN" stands for Long Range Navigation, not "Loran." It can refer to any navigation receiver, including Loran, GPS, etc. You are probably seeing one or more of these messages:
How do I adjust the vertical height/position of the display? Unlike the horizontal position of the display, which is a pilot adjustment, the vertical height is an internal adjustment that must be performed by a shop. Any shop with a maintenance manual is authorized to perform this adjustment. Normally it will be done before the aircraft is delivered. This is not normally an issue if our mounting location recommendations are followed, but sometimes it is impossible to do so due to panel layout.
If I simply plug in a color Argus where my monochrome unit was installed, what features do I lose? There is a second connector on the back of the CE units. This connector has extra pins for the following features:
If you do not need any of these features, you can simply plug in the color Argus where
the monochrome unit was installed, with appropriate paperwork. The second
connector and additional features can always be added later.
The Argus can be a "tight fit" in some panels. It can be reinserted in
such panels without all the connector contacts mating, in which case any number of
problems can occur, from total non-operation to intermittent operation, to perhaps one
function being intermittent. The Argus should go back in its socket with a
satisfying "thunk." If it's so difficult to reinsert that it's hard to
tell if a good connection has been made, first check to make sure the top two screws
aren't too tight. If the Argus is binding on the panel instead of the mounting tray,
the opening should be enlarged. Incidentally, a removal tool is available from
Eventide.
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