JP1 Remotes

Carl

I cannot communicate with my new Atlas URC-1056B01.I know my interface circuit is fine because it is working with my URC-8820.
I never had any problems with my other two remotes but this Atlas remote is driving me crazy. Am I missing something?

It keeps saying: Failed to open JP1.x interface.
I am using the Discrete Transistor Version of Serial JP1.2/3 Interface designed by Tommy N. Tyler.

Any help will be greatly appreciated.

tennessee titan · Joined: 18 Nov 2008 Posts: 117

Did you try the cable the other way around?
Did you try a reset of the remote?
Are your batteries known good?

mattg568 · Joined: 27 Jan 2007 Posts: 80

Or could it be the "pin 5" issue?

JP1.3 remotes had that issue whereas JP1.2 remotes did not, I think. If that is the case, you will have to bend pin number 5 to get it to work.

A warning: If you do a 981 reset on an Atlas, you will delete any pre-installed upgrades, if there are any.

Carl · Posted: Thu Jan 15, 2009 9:37 pm Post subject:

The batteries are brand new and I don't think its the pin 5 issue cause if you look at the schematics its not conected anyway.

xnappo · Expert Joined: 30 Dec 2003 Posts: 861

The Robman · Posted: Thu Jan 15, 2009 10:38 pm Post subject:

It's not enough to have pin5 not be connected at the PCB end, it needs to be physically cut at the other end, or the cable will not work.

If you don't believe me, check out these very recent threads...
http://www.hifi-remote.com/forums/viewtopic.php?t=10477
http://www.hifi-remote.com/forums/viewtopic.php?t=10518
_________________
Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!

unclemiltie · Posted: Thu Jan 15, 2009 10:50 pm Post subject:

yea, you have to clip the wire at the connector end. If you don't, the other wires act like antennas and pick up stray signals and screw things up.

Believe me, I went through this a while back with a JP1.3 and after that went in and clipped it right at the connector.

Take the strain relief off, get an Xacto knife, split the cable right at the connector and take a mm or so of cable out of pin 5. put strain relief back, everything will be good

-bill
_________________
this JP1 stuff is a sickness!

greenough1 · Joined: 30 Jan 2005 Posts: 659

You can also clip the pin from the JP1.3 header. The second page of Robman's second link HERE shows the pin number scheme.

Sometimes it does pay to try another set of fresh batteries. I have yet another 1056 30333 sig Atlas JP1.3 remote in the drawer. I put the ostensibly fresh batteries from the comcast 1067 JP1.3 remote into the Atlas and voila, cannot open the JP1.x interface message. Went out to the storage cabinet and got a fresh pair of batteries (actually 2 fresh pairs just in case). The first fresh pair worked perfectly.

Best,
jeff

Carl · Posted: Fri Jan 16, 2009 6:51 am Post subject:

I have bent pin 5 on the remote side still having problem....
I'll just have to keep looking then...

Capn Trips · Expert Joined: 03 Oct 2003 Posts: 3990

Carl · Posted: Fri Jan 16, 2009 8:34 am Post subject:

I have tried the cable both way and its hard to bend the wrong pin since the pin numbers are indicated on the PCB.

here is a picture:

mdavej · Expert Joined: 08 Oct 2003 Posts: 4501

See THIS thread. That may have something to do with your issue.

greenough1 · Joined: 30 Jan 2005 Posts: 659

mdavej · Expert Joined: 08 Oct 2003 Posts: 4501

I assume it's THIS one, which supposedly doesn't have the problem. But I'm just grasping at straws here.

greenough1 · Joined: 30 Jan 2005 Posts: 659

Thanks for pointing that out mdavej, I need to read more carefully. He said serial JP1.2/3 interface.

I've got 3 1056 Atlases all sig 30333 (black, backlite, JP1.3), not good statistical sampling, but better than a single one. One was bought when these first started appearing. One is about 6 months old, and the last one is about 3 months oldy.
The oldest one has never given me a problem connecting with my serial JP1.2/3 interface as built by Tommy.

The two newer ones are very finicky about battery strength. The errors I've seen are: 1) cannot open JP1.x interface, 2) data differences between what was sent and received by the remote. Batteries that give an error in the my newer Atlas, are not a problem for the oldest one.

I'll bet we're just hitting the variation possibilities pointed out by Tommy in the post linked above. This is the first example though where we've run out of tricks to try to get it to connect. Any hardware experts have some more things to try?

Best,
jeff