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rempfer

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Reply with quote  #16 
Quote:
Originally Posted by boomer_106
The Az Elite has a built in power supply
Oops.  Sorry.  As you were.
boomer_106

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Reply with quote  #17 
Quote:
Originally Posted by rempfer
Oops.  Sorry.  As you were.


I'm trying to decide if the best option to try first is recapping the power supply or, if this is a tuner issue. It seems like the tuner working for a short period then quitting could very well be a bad tuner. Maybe I have leaky caps on the tuner module?

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merkin

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Reply with quote  #18 
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Originally Posted by boomer_106


On some of my reboots, under the TV channel option I don't get DVBS. I only get IP channel and the Always start in tv mode option. Not sure if that's important information or not. 



i have seen this exact issue in the past.
tuner communicates with SoC (smp8634) over i2c bus.  i guess any noise on the bus could cause it to not appear.  its a pretty simple protocol, but you will need to log it.  i use a saleae logic analyzer.

its so cheap easy to replace 'lytic caps..i would prolly do that first.  and just because they appear in good shape doesnt mean they arent dried out.


boomer_106

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Reply with quote  #19 
Quote:
Originally Posted by merkin

i have seen this exact issue in the past.
tuner communicates with SoC (smp8634) over i2c bus.  i guess any noise on the bus could cause it to not appear.  its a pretty simple protocol, but you will need to log it.  i use a saleae logic analyzer.

its so cheap easy to replace 'lytic caps..i would prolly do that first.  and just because they appear in good shape doesnt mean they arent dried out.




Are we talking tuner caps, power supply, both, other?

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techjunkie02

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Reply with quote  #20 
Just out of curiosity, have you made sure it's all clean?  Dust can cause all kinds of strange issues.


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merkin

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Reply with quote  #21 
Quote:
Originally Posted by boomer_106


Are we talking tuner caps, power supply, both, other?

just the psu.
i never looked close at the tuner mod..does it even have polarized caps?

there is prolly a few rails (20v, 12v, 5v, 3.3v) coming from the psu. and they are usually labeled on the pcb.

the first gen azboxes were based off sigmas envision and vantage dev boards. full schematics and sdk have been publically available on the net for years. it wont help with the psu, but if issue persists after recapping at least its available.

if its worth it to you..mail me your tuner and psu. i can drop them in my elite and test as a last resort.
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Reply with quote  #22 
Quote:
Originally Posted by techjunkie02
Just out of curiosity, have you made sure it's all clean?  Dust can cause all kinds of strange issues.



Yes, it's nice and clean inside. 

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boomer_106

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Reply with quote  #23 
Quote:
Originally Posted by merkin
just the psu. i never looked close at the tuner mod..does it even have polarized caps? there is prolly a few rails (20v, 12v, 5v, 3.3v) coming from the psu. and they are usually labeled on the pcb. the first gen azboxes were based off sigmas envision and vantage dev boards. full schematics and sdk have been publically available on the net for years. it wont help with the psu, but if issue persists after recapping at least its available. if its worth it to you..mail me your tuner and psu. i can drop them in my elite and test as a last resort.


Now that I think of it, I don't think they were polarized. I think I might just take you up on that offer merkin. That would be a great way of finding out if I'm messing with the right part or not. They are light so it wouldn't cost much to ship them. I'm sure I could work it out with the post office to pay for the return shipping up front. 

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Hockeynut

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Reply with quote  #24 
Quote:
Originally Posted by merkin
just the psu. i never looked close at the tuner mod..does it even have polarized caps? there is prolly a few rails (20v, 12v, 5v, 3.3v) coming from the psu. and they are usually labeled on the pcb. the first gen azboxes were based off sigmas envision and vantage dev boards. full schematics and sdk have been publically available on the net for years. it wont help with the psu, but if issue persists after recapping at least its available. if its worth it to you..mail me your tuner and psu. i can drop them in my elite and test as a last resort.

Merks I would mail you my Elite for you to tinker with and figure out why it will no longer lock a signal.glad to compensate for any time and parts you put into it.I have changed out the tuner and all the caps look fine to me but electronics is not my specialty so I may have looked over the obvious that one with a trained eye would see..Any other STB not capable of 4:2:2 would have been in the garbage long ago.

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1.2 Ch Masters parked at 91,103,105...1.2 Ch Master on a factory Ch Master polar mount tracking from 58-127.
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Reply with quote  #25 
Quote:
Originally Posted by Hockeynut

Merks I would mail you my Elite for you to tinker with and figure out why it will no longer lock a signal.glad to compensate for any time and parts you put into it.I have changed out the tuner and all the caps look fine to me but electronics is not my specialty so I may have looked over the obvious that one with a trained eye would see..Any other STB not capable of 4:2:2 would have been in the garbage long ago.


if you swapped out the tuner and still have the same issue then i think we can rule out the tuner.

i wonder if anyone has seen this issue with the other first gen azbox models..dont you have a couple? 

anyway would love to help, but lets first see if i can do anything with @boomer's
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Reply with quote  #26 
For sure giving a helping hand for Boom.Not like I am lacking for dealing with 4:2:2 signals with the puters.etc...Please keep thread alive because I think this may be an issue with the Elites dying a slow death.Thanks Merks.
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Dish`s--10' KTI,10' Button Hook,10' Unimesh x2, 12' Cosmos,8 1/2 foot Birdview in the works.
1.2 Ch Masters parked at 91,103,105...1.2 Ch Master on a factory Ch Master polar mount tracking from 58-127.
Positioners--Gbox,Vbox and ASC1`s
Receivers--AZMe,AZPlus,AZElite,Icecrypt S1600 HD,Pansat 9500,VU Solo2 SE,Octagon SF4008 UHD 4K,Prof 7500,TBS 6982.

jdcpa

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Reply with quote  #27 
Quote:
Originally Posted by boomer_106
The problem with just replacing caps is there are a million of them. If it's just the power supply caps, that wouldn't be so bad.

Focus on the brands and the sizes. The low uF value ones are usually not subject to failure. Electrolytics that are at least ~7.5mm diameter or ~13mm tall and are not on these two lists of good cap brands may be considered possible suspects even if they haven't leaked or bulged. The list of bad cap brands is much longer. IME, Elna, Jackcon, Jamicon, Lelon and Su'scon don't deserve to be on either list.

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WT1964

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Reply with quote  #28 
There are so many poor quality cap producers these days it's hard to keep up with the good guys.

A far cry from back when I started in electronics !  There were Mallory,Cornell Dublier and Sprague you could count on and even GE to a point. Just repaired a McIntosh amp that had quite a few GE caps in it. So that tells it's age [smile]  It had 2 30,000uf @ 45 wv power supply caps that were still working but had begun leaking. Not bad for early 70's vintage parts and probably not anything we can expect these days [smile]

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merkin

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Reply with quote  #29 
well @boomer_106 sent me his tuner and psu. i did some quick tests:

1.  with his tuner and his psu the tuner does not show up in the settings menu of my elite, therefore i cannot check for a lock

2.  with my tuner and and his psu the tuner does not show up in the settings menu of my elite, therefore i cannot check for a lock

3.  with his tuner and my psu the tuner does show up in the settings menu of my elite, and i can aquire a lock

so it appears the root of the problem is a failing psu..now the real fun begins.

everything passes the eye test and the feel test, but the sound test fails. when using his psu i can hear a soft whistling noise coming from the psu when the elite is booting.

ill start testing some parts..at least i have a reference psu.
boomer_106

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Reply with quote  #30 
Quote:
Originally Posted by merkin
well @boomer_106 sent me his tuner and psu. i did some quick tests:

1.  with his tuner and his psu the tuner does not show up in the settings menu of my elite, therefore i cannot check for a lock

2.  with my tuner and and his psu the tuner does not show up in the settings menu of my elite, therefore i cannot check for a lock

3.  with his tuner and my psu the tuner does show up in the settings menu of my elite, and i can aquire a lock

so it appears the root of the problem is a failing psu..now the real fun begins.

everything passes the eye test and the feel test, but the sound test fails. when using his psu i can hear a soft whistling noise coming from the psu when the elite is booting.

ill start testing some parts..at least i have a reference psu.
.

Thanks for this merkin. I thought for sure the tuner was bad but, I resisted the urge to just buy one

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Fellow Members, your posts are welcome here! Do not worry about posting everything perfect. Different receivers and LNB's will give you different Frequencies and Symbol Rates. Some set top boxes, PCI cards and USB receivers, Do Not Require all of the same information that others may need. It is not Required to post everything that others may need to tune in a feed. It is just most important to share the find. We can always adjust the Frequency and Symbol Rates and try the various Modulations and FEC's on our own receivers until we get a lock and then give a polite reply with what works for your receiver, as that information might help others as well. We all appreciate the efforts and energy of the Posters!

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