[time-nuts] Re: Trimble Netrs How do you open it up?

[Bob kb8tq]

Hi

As it boots, all the LED’s should blink. At least that’s what it does with the 
recent firmware. There (obviously) be strange things going on with earlier
firmware. 

When I’m running one, the web interface is the “go to” way to check things.
The front panel could be dead and I’d still get things done. It’s really only needed
for debug when the web does not come up. The most likely case there is a 
defective flash card. The unit just reboots and reboots forever in that case. 
The process is pretty obvious from the front panel serial port so even then, 
the LED’s aren’t vital. 

Bob

> On Mar 19, 2022, at 6:25 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Bob
> Thanks just didn't use a bit more of a hit. Everything pops loose. I took a quick look inside and nothing at all obvious as an issue. In reassembling the unit the back assembly micro-ide connector is delicate. Not a real problem but is easy to get mis-aligned.
> When booting up the system does blink the lEDs but not the gps satellite or Frequency LED. The frequency LED will be easy to check.
> Regards
> Paul
> 
> On Sat, Mar 19, 2022 at 4:55 PM Bob kb8tq <kb8tq at n1k.org <mailto:kb8tq at n1k.org>> wrote:
> Hi
> 
> Quick way to take apart a NetRS:
> 
> 1) Pull out all the screws from the front panel ( the one with the LED’s on it).
> 
> 2) Pull the screws from the mounting bracket (if it’s still there). All are T10 Torx. 
> 
> 3) Reverse the Torx driver and use it as a small hammer. Tap the “ears” on 
> the front panel. You don’t need to go crazy. It will pop off. 
> 
> The D connector on the front panel is normally attached with ribbon cable. 
> There is no need to unscrew it. If anything, unscrewing it is a bad idea since
> doing so would allow the sub-cabe to the front panel to flex / break. 
> 
> Next use a pair of needle nose pliers to unbend the latching strap that holds
> the flash card in place. It’s directly above the place the ribbon cable from the 
> front panel comes into the main assembly. 
> 
> Now you can unplug the flash card and replace it. 
> 
> On normal power up, with only power applied ( nothing else attached ). The 
> front panel LED’s go through a series of flash flash flash stuff. Eventually they
> calm down and you just get a green light showing you which power input you
> are connected to.
> 
> Normal drill is to just leave the back panel in place. Unless something is broke,
> there is no reason to pull it. 
> 
> Fun !!
> 
> Bob
> 
> > On Mar 19, 2022, at 4:04 PM, paul swed <paulswedb at gmail.com <mailto:paulswedb at gmail.com>> wrote:
> > 
> > OK have figured the main and standby power out. They work fine.
> > I want to check the internals of the receiver for any damage.
> > Have removed the front and back torx screws and front DE9 locking nuts.
> > But it refuses to let loose. Am I fighting a rubber grommet? Maybe I do
> > need to take all of the back N and BNC connector nuts off. This thing feels
> > very tough to open and do not want to damage it.
> > 
> > Also all of the almanacs and such are totally 0. That could have easily
> > happened when I was doing a factory reset. Especially since the data zero
> > is almost exactly the same as a factory reset.
> > Thanks
> > Paul
> > WB8TSL
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