Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Gilat AN8004 mod.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="s-band" data-source="post: 1151103" data-attributes="member: 407744"><p>The area you highlight is unlikely to make much difference. Those are chokes to keep high frequencies (probably the LO or LO/2) coming out of the IF port. That shouldn't stop it working.</p><p></p><p>[ATTACH]151427[/ATTACH]</p><p></p><p>First, bake it for a few hours at about 80 degrees.</p><p></p><p>I've highlighted the areas that are more likely to have stopped it working. It's hard to see from the photos but there may be connections across the inter-stage coupling lines. Before you start, measure the current drawn by just the LNB and record the noise profile on Crazyscan or IQ Monitor etc. From memory, the current is normally around 120-130mA.</p><p></p><p>I would get a small, short haired, stiff brush and some IPA (Propan 2 ol). Scrub the whole board paying special attention to the corroded areas. Also clean up the soldered areas. That is best done under a stereo microscope or good magnifier. Take care not to do any more damage when scrubbing. You might need to us a needle to clear areas between tracks but make sure those areas are meant to be clear. Give it another clean after using a needle to remove anything disturbed. Make sure that the oscillator under the board looks clean. Once you've cleaned it, check again to see if there are any breaks in the thin tracks.</p><p></p><p>Re-check the current and noise profile. Has anything changed? If so, it is worth testing again on the dish.</p><p></p><p>Good luck.</p></blockquote><p></p>
[QUOTE="s-band, post: 1151103, member: 407744"] The area you highlight is unlikely to make much difference. Those are chokes to keep high frequencies (probably the LO or LO/2) coming out of the IF port. That shouldn't stop it working. [ATTACH alt="after1.jpg"]151427[/ATTACH] First, bake it for a few hours at about 80 degrees. I've highlighted the areas that are more likely to have stopped it working. It's hard to see from the photos but there may be connections across the inter-stage coupling lines. Before you start, measure the current drawn by just the LNB and record the noise profile on Crazyscan or IQ Monitor etc. From memory, the current is normally around 120-130mA. I would get a small, short haired, stiff brush and some IPA (Propan 2 ol). Scrub the whole board paying special attention to the corroded areas. Also clean up the soldered areas. That is best done under a stereo microscope or good magnifier. Take care not to do any more damage when scrubbing. You might need to us a needle to clear areas between tracks but make sure those areas are meant to be clear. Give it another clean after using a needle to remove anything disturbed. Make sure that the oscillator under the board looks clean. Once you've cleaned it, check again to see if there are any breaks in the thin tracks. Re-check the current and noise profile. Has anything changed? If so, it is worth testing again on the dish. Good luck. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Gilat AN8004 mod.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top