Cambridge 302 and GPS-NAV owners – IMPORTANT NEWS

Cambridge 302 and GPS-NAV owners – IMPORTANT NEWS

Unfortunately, there has been a rash of Cambridge Model 10/20/25 and
302/302A with a fault in which the units lose track of the date and do not
record a flight log, or record a flight log with an incorrect date. The
problem is related to the internal Garmin GPS engine’s UTC date. This is a
new issue, but there have already been many reported instances – especially
from areas in which there are soaring flights this time of year. It is very
likely that many 302 and GPS-NAV owners that have their gliders put away for
the winter will, unfortunately, have the same issue during their first
flight in the spring.

If you have the optional LCD display connected to your 302 or GPS-NAV flight
recorder, you may be able to tell whether or not your unit is affected.
Connect the GPS-NAV Model 20/25 to a GPS-NAV LCD Navigation Display, or
connect the 302 to a 303 LCD Navigation display and give the unit time to
lock onto satellites before continuing. The GPS-NAV’s LED will blink when
it is locked onto satellites. The 302 will show 3 bars on the right side of
the screen when it has a good lock on satellites. Then scroll to the UTC
date/time screen. If your unit is working properly you will see the current
date. If your units is not working properly you will find an erroneous
date – such as 2005. In that case, the unit will need repair.

If your GPS-NAV or 302 does not have the optional LCD Navigation display,
then the best way to determine whether your units is affected is to take a
flight (or drive) and look at the date of the flight log that is generated.
Make sure the unit has a good lock on satellites before takeoff. If the
flight log’s date is off, or no flight log is generated, then the unit will
need repair.

The bad news is that the units will need to be sent in for repair. It is
not possible to repair the unit in the field. This issue affects the GPS
engine which is inside the logger, not the external GPS antenna.

The great news is that Gary Kammerer at ClearNav can fix them. The Garmin
receiver has a 3v rechargeable battery under its cover. The issue is not
related to the 3v logger security button battery. Gary can remove the Garmin’s
cover, replace the 3v rechargeable battery that is soldered to the Garmin
circuit board put the unit back together and then send a couple of commands
to the GPS which wake the Garmin back to reality. The new battery keeps it
working properly after the repair procedure. Without the replacement
battery the Garmin's memory cannot be kept "alive". Gary has performed this
fix to dozens of 302 and GPS-NAV units he has received from all over. They
have all been successfully repaired.

CNI Service Policy For Cambridge Equipment--
http://www.clearnav.net/main/cn-service.html

Gary’s contact information:
Gary Kammerer
ClearNav Instruments
779 Rosedale Rd
Kennett Square, PA 19348
USA
Phone: 610-388-0456
Email:

Please include a note explaining the reason you are sending the unit to
Gary, and also include your contact information.

Gary and I hope this information will allow you to resolve this issue with
your 302 or GPS-NAV before your next big soaring flight.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

Paul
Is there a time line for a Date of Manufacture or a Serial number batch?
Is this happening to 5, 10 or 15 year old units?

Thanks
Randy

On Friday, November 21, 2014 6:36:51 PM UTC-8, wrote:
Paul
Is there a time line for a Date of Manufacture or a Serial number batch?
Is this happening to 5, 10 or 15 year old units?

Thanks
Randy

Does it impact log files generated in external PDAs/tablets connected to 302 and running SeeYou, XCSoar etc?

Ramy

Hi Ramy,

Yes. The PDA flight log data will probably also be wrong if the 302 date is
wrong. I have received some reports of that occurring. But I suppose it
depends on the software.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.
_____________________

"Ramy" wrote in message
...

On Friday, November 21, 2014 6:36:51 PM UTC-8, wrote:
Paul
Is there a time line for a Date of Manufacture or a Serial number batch?
Is this happening to 5, 10 or 15 year old units?

Thanks
Randy

Does it impact log files generated in external PDAs/tablets connected to 302
and running SeeYou, XCSoar etc?

Ramy

Hi Randy,

I don't think we know. It seems to affect many 302 and GPS-NAV units.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

wrote in message
...

Paul
Is there a time line for a Date of Manufacture or a Serial number batch?
Is this happening to 5, 10 or 15 year old units?

Thanks
Randy

On Friday, November 21, 2014 2:52:01 PM UTC-5, Paul Remde wrote:
Cambridge 302 and GPS-NAV owners - IMPORTANT NEWS

Unfortunately, there has been a rash of Cambridge Model 10/20/25 and
302/302A with a fault in which the units lose track of the date and do not
record a flight log, or record a flight log with an incorrect date. The
problem is related to the internal Garmin GPS engine's UTC date. This is a
new issue, but there have already been many reported instances - especially
from areas in which there are soaring flights this time of year. It is very
likely that many 302 and GPS-NAV owners that have their gliders put away for
the winter will, unfortunately, have the same issue during their first
flight in the spring.

If you have the optional LCD display connected to your 302 or GPS-NAV flight
recorder, you may be able to tell whether or not your unit is affected.
Connect the GPS-NAV Model 20/25 to a GPS-NAV LCD Navigation Display, or
connect the 302 to a 303 LCD Navigation display and give the unit time to
lock onto satellites before continuing. The GPS-NAV's LED will blink when
it is locked onto satellites. The 302 will show 3 bars on the right side of
the screen when it has a good lock on satellites. Then scroll to the UTC
date/time screen. If your unit is working properly you will see the current
date. If your units is not working properly you will find an erroneous
date - such as 2005. In that case, the unit will need repair.

If your GPS-NAV or 302 does not have the optional LCD Navigation display,
then the best way to determine whether your units is affected is to take a
flight (or drive) and look at the date of the flight log that is generated.
Make sure the unit has a good lock on satellites before takeoff. If the
flight log's date is off, or no flight log is generated, then the unit will
need repair.

The bad news is that the units will need to be sent in for repair. It is
not possible to repair the unit in the field. This issue affects the GPS
engine which is inside the logger, not the external GPS antenna.

The great news is that Gary Kammerer at ClearNav can fix them. The Garmin
receiver has a 3v rechargeable battery under its cover. The issue is not
related to the 3v logger security button battery. Gary can remove the Garmin's
cover, replace the 3v rechargeable battery that is soldered to the Garmin
circuit board put the unit back together and then send a couple of commands
to the GPS which wake the Garmin back to reality. The new battery keeps it
working properly after the repair procedure. Without the replacement
battery the Garmin's memory cannot be kept "alive". Gary has performed this
fix to dozens of 302 and GPS-NAV units he has received from all over. They
have all been successfully repaired.

CNI Service Policy For Cambridge Equipment--
http://www.clearnav.net/main/cn-service.html

Gary's contact information:
Gary Kammerer
ClearNav Instruments
779 Rosedale Rd
Kennett Square, PA 19348
USA
Phone: 610-388-0456
Email:

Please include a note explaining the reason you are sending the unit to
Gary, and also include your contact information.

Gary and I hope this information will allow you to resolve this issue with
your 302 or GPS-NAV before your next big soaring flight.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

Paul,

I have a Cambridge model 20 GPS...I have hooked it up to a battery and went thru the directions I don't see any screen that says date and time. I went to your demo on your web site and it doesn't show any date and time screen either.

Any hints as to what i am doing wrong?

Dennis

On Saturday, November 22, 2014 10:53:14 AM UTC-5, HGXC wrote:
On Friday, November 21, 2014 2:52:01 PM UTC-5, Paul Remde wrote:
Cambridge 302 and GPS-NAV owners - IMPORTANT NEWS

Unfortunately, there has been a rash of Cambridge Model 10/20/25 and
302/302A with a fault in which the units lose track of the date and do not
record a flight log, or record a flight log with an incorrect date. The
problem is related to the internal Garmin GPS engine's UTC date. This is a
new issue, but there have already been many reported instances - especially
from areas in which there are soaring flights this time of year. It is very
likely that many 302 and GPS-NAV owners that have their gliders put away for
the winter will, unfortunately, have the same issue during their first
flight in the spring.

If you have the optional LCD display connected to your 302 or GPS-NAV flight
recorder, you may be able to tell whether or not your unit is affected.
Connect the GPS-NAV Model 20/25 to a GPS-NAV LCD Navigation Display, or
connect the 302 to a 303 LCD Navigation display and give the unit time to
lock onto satellites before continuing. The GPS-NAV's LED will blink when
it is locked onto satellites. The 302 will show 3 bars on the right side of
the screen when it has a good lock on satellites. Then scroll to the UTC
date/time screen. If your unit is working properly you will see the current
date. If your units is not working properly you will find an erroneous
date - such as 2005. In that case, the unit will need repair.

If your GPS-NAV or 302 does not have the optional LCD Navigation display,
then the best way to determine whether your units is affected is to take a
flight (or drive) and look at the date of the flight log that is generated.
Make sure the unit has a good lock on satellites before takeoff. If the
flight log's date is off, or no flight log is generated, then the unit will
need repair.

The bad news is that the units will need to be sent in for repair. It is
not possible to repair the unit in the field. This issue affects the GPS
engine which is inside the logger, not the external GPS antenna.

The great news is that Gary Kammerer at ClearNav can fix them. The Garmin
receiver has a 3v rechargeable battery under its cover. The issue is not
related to the 3v logger security button battery. Gary can remove the Garmin's
cover, replace the 3v rechargeable battery that is soldered to the Garmin
circuit board put the unit back together and then send a couple of commands
to the GPS which wake the Garmin back to reality. The new battery keeps it
working properly after the repair procedure. Without the replacement
battery the Garmin's memory cannot be kept "alive". Gary has performed this
fix to dozens of 302 and GPS-NAV units he has received from all over. They
have all been successfully repaired.

CNI Service Policy For Cambridge Equipment--
http://www.clearnav.net/main/cn-service.html

Gary's contact information:
Gary Kammerer
ClearNav Instruments
779 Rosedale Rd
Kennett Square, PA 19348
USA
Phone: 610-388-0456
Email:

Please include a note explaining the reason you are sending the unit to
Gary, and also include your contact information.

Gary and I hope this information will allow you to resolve this issue with
your 302 or GPS-NAV before your next big soaring flight.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

Paul,

I have a Cambridge model 20 GPS...I have hooked it up to a battery and went thru the directions I don't see any screen that says date and time. I went to your demo on your web site and it doesn't show any date and time screen either.

Any hints as to what i am doing wrong?

Dennis

I finally got it, if you are having issues go to the manual and look up UTC screen information. its tricky

Dennis

Dennis,

I know you already have this worked-out, but I thought it was also worth
posting here.

http://www.cumulus-soaring.com/cai/demogpsnav/l47.htm
The link above is to the GPS-NAV’s date page. You get to it by going to the
GPS position page and using the up or down arrows. I can see that it is not
obvious how to get there.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

"HGXC" wrote in message
...

On Friday, November 21, 2014 2:52:01 PM UTC-5, Paul Remde wrote:
Cambridge 302 and GPS-NAV owners - IMPORTANT NEWS

Unfortunately, there has been a rash of Cambridge Model 10/20/25 and
302/302A with a fault in which the units lose track of the date and do not
record a flight log, or record a flight log with an incorrect date. The
problem is related to the internal Garmin GPS engine's UTC date. This is
a
new issue, but there have already been many reported instances -
especially
from areas in which there are soaring flights this time of year. It is
very
likely that many 302 and GPS-NAV owners that have their gliders put away
for
the winter will, unfortunately, have the same issue during their first
flight in the spring.

If you have the optional LCD display connected to your 302 or GPS-NAV
flight
recorder, you may be able to tell whether or not your unit is affected.
Connect the GPS-NAV Model 20/25 to a GPS-NAV LCD Navigation Display, or
connect the 302 to a 303 LCD Navigation display and give the unit time to
lock onto satellites before continuing. The GPS-NAV's LED will blink when
it is locked onto satellites. The 302 will show 3 bars on the right side
of
the screen when it has a good lock on satellites. Then scroll to the UTC
date/time screen. If your unit is working properly you will see the
current
date. If your units is not working properly you will find an erroneous
date - such as 2005. In that case, the unit will need repair.

If your GPS-NAV or 302 does not have the optional LCD Navigation display,
then the best way to determine whether your units is affected is to take a
flight (or drive) and look at the date of the flight log that is
generated.
Make sure the unit has a good lock on satellites before takeoff. If the
flight log's date is off, or no flight log is generated, then the unit
will
need repair.

The bad news is that the units will need to be sent in for repair. It is
not possible to repair the unit in the field. This issue affects the GPS
engine which is inside the logger, not the external GPS antenna.

The great news is that Gary Kammerer at ClearNav can fix them. The Garmin
receiver has a 3v rechargeable battery under its cover. The issue is not
related to the 3v logger security button battery. Gary can remove the
Garmin's
cover, replace the 3v rechargeable battery that is soldered to the Garmin
circuit board put the unit back together and then send a couple of
commands
to the GPS which wake the Garmin back to reality. The new battery keeps it
working properly after the repair procedure. Without the replacement
battery the Garmin's memory cannot be kept "alive". Gary has performed
this
fix to dozens of 302 and GPS-NAV units he has received from all over. They
have all been successfully repaired.

CNI Service Policy For Cambridge Equipment--
http://www.clearnav.net/main/cn-service.html

Gary's contact information:
Gary Kammerer
ClearNav Instruments
779 Rosedale Rd
Kennett Square, PA 19348
USA
Phone: 610-388-0456
Email:

Please include a note explaining the reason you are sending the unit to
Gary, and also include your contact information.

Gary and I hope this information will allow you to resolve this issue with
your 302 or GPS-NAV before your next big soaring flight.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

Paul,

I have a Cambridge model 20 GPS...I have hooked it up to a battery and went
thru the directions I don't see any screen that says date and time. I went
to your demo on your web site and it doesn't show any date and time screen
either.

Any hints as to what i am doing wrong?

Dennis

On Friday, November 21, 2014 12:52:01 PM UTC-7, Paul Remde wrote:
Cambridge 302 and GPS-NAV owners - IMPORTANT NEWS

Unfortunately, there has been a rash of Cambridge Model 10/20/25 and
302/302A with a fault in which the units lose track of the date and do not
record a flight log, or record a flight log with an incorrect date. The
problem is related to the internal Garmin GPS engine's UTC date. This is a
new issue, but there have already been many reported instances - especially
from areas in which there are soaring flights this time of year. It is very
likely that many 302 and GPS-NAV owners that have their gliders put away for
the winter will, unfortunately, have the same issue during their first
flight in the spring.

If you have the optional LCD display connected to your 302 or GPS-NAV flight
recorder, you may be able to tell whether or not your unit is affected.
Connect the GPS-NAV Model 20/25 to a GPS-NAV LCD Navigation Display, or
connect the 302 to a 303 LCD Navigation display and give the unit time to
lock onto satellites before continuing. The GPS-NAV's LED will blink when
it is locked onto satellites. The 302 will show 3 bars on the right side of
the screen when it has a good lock on satellites. Then scroll to the UTC
date/time screen. If your unit is working properly you will see the current
date. If your units is not working properly you will find an erroneous
date - such as 2005. In that case, the unit will need repair.

If your GPS-NAV or 302 does not have the optional LCD Navigation display,
then the best way to determine whether your units is affected is to take a
flight (or drive) and look at the date of the flight log that is generated.
Make sure the unit has a good lock on satellites before takeoff. If the
flight log's date is off, or no flight log is generated, then the unit will
need repair.

The bad news is that the units will need to be sent in for repair. It is
not possible to repair the unit in the field. This issue affects the GPS
engine which is inside the logger, not the external GPS antenna.

The great news is that Gary Kammerer at ClearNav can fix them. The Garmin
receiver has a 3v rechargeable battery under its cover. The issue is not
related to the 3v logger security button battery. Gary can remove the Garmin's
cover, replace the 3v rechargeable battery that is soldered to the Garmin
circuit board put the unit back together and then send a couple of commands
to the GPS which wake the Garmin back to reality. The new battery keeps it
working properly after the repair procedure. Without the replacement
battery the Garmin's memory cannot be kept "alive". Gary has performed this
fix to dozens of 302 and GPS-NAV units he has received from all over. They
have all been successfully repaired.

CNI Service Policy For Cambridge Equipment--
http://www.clearnav.net/main/cn-service.html

Gary's contact information:
Gary Kammerer
ClearNav Instruments
779 Rosedale Rd
Kennett Square, PA 19348
USA
Phone: 610-388-0456
Email:

Please include a note explaining the reason you are sending the unit to
Gary, and also include your contact information.

Gary and I hope this information will allow you to resolve this issue with
your 302 or GPS-NAV before your next big soaring flight.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.

FWIW. I just powered my 302 up. The 303 first showed 1/2005 for the date on the 303 display. Then the 302 went to a 3 bar display and the 303 changed dates to 4/08/95 date.
I did leave it on for 30 minutes and then powered off and back on. No change in date...4/08/95. So, its new battery time.

Good job and thanks Paul for the news update.

Best, #711.

On Sat, 22 Nov 2014 13:05:06 -0800, Tom Kelley #711 wrote:

FWIW. I just powered my 302 up. The 303 first showed 1/2005 for the
date on the 303 display. Then the 302 went to a 3 bar display and the
303 changed dates to 4/08/95 date.
I did leave it on for 30 minutes and then powered off and back on. No
change in date...4/08/95. So, its new battery time.

Good job and thanks Paul for the news update.

Best, #711.

So there seems to be two lithiums in there, one for the electronic seal
and one for the GPS. If you're returning a 302 for the GPS issue, I'd
suggest changing both of them. The older models let a user change the
security one himself if external power was applied, but don't think
that's an option with the 302. The older models also show battery
voltage on powerup, giving plenty of warning that replacement is needed.

I sent my 302 in last winter, due to the gain on the ENL circuit somehow
getting set to 0, and asked for the lithium battery to be replaced. The
email back and forth with Gary just mentions the one battery, but I see
on the invoice he said 'batteries' replaced, so maybe he actually did
both.

Dave