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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Strange problem with no power to motor
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<blockquote data-quote="jeallen01" data-source="post: 1149777" data-attributes="member: 176704"><p>You said that you checked the continuity of the core at 4 Ohms, but did you check the continuity of the braid as the:</p><p>- the motor forms part of a circuit consisting of the +14-18V DC from the centre core of the receiver "LNB" F-connector down the cable core, which then feeds the centre pin of one F-connector of the motor, the motor itself, and then the "-DC"/ground return back down the braid to the the outer part of the receiver LNB F connector. Any break or high resistance joint in either the core connection OR the return connection via the braid would lead to the motor not getting sufficient voltage & current for it to be able to move.</p><p>- as per the above except in respect of the connection to the above, the LNB requires may well require much less current (about 250-350mA) than the motor and might be continuing to work and produce some sort of signal but much less than normal if the return path by the braid were damaged but not actually completely broken.</p><p></p><p>Therefore, check the braid connections very carefully as there could be actual breaks/high resistance joints (due to loose F-connectors &/or corrosion due to water getting inside those connectors. There might also be actual physical damage to the cables themselves.</p><p></p><p>Unfortunately (for you!) any buried cables would definitely be prime suspects for corrosion damage!</p><p></p><p>PS: also agree with [USER=415764]@Manikm909[/USER] about the junction box (whatever that is - pictures might well help??)</p></blockquote><p></p>
[QUOTE="jeallen01, post: 1149777, member: 176704"] You said that you checked the continuity of the core at 4 Ohms, but did you check the continuity of the braid as the: - the motor forms part of a circuit consisting of the +14-18V DC from the centre core of the receiver "LNB" F-connector down the cable core, which then feeds the centre pin of one F-connector of the motor, the motor itself, and then the "-DC"/ground return back down the braid to the the outer part of the receiver LNB F connector. Any break or high resistance joint in either the core connection OR the return connection via the braid would lead to the motor not getting sufficient voltage & current for it to be able to move. - as per the above except in respect of the connection to the above, the LNB requires may well require much less current (about 250-350mA) than the motor and might be continuing to work and produce some sort of signal but much less than normal if the return path by the braid were damaged but not actually completely broken. Therefore, check the braid connections very carefully as there could be actual breaks/high resistance joints (due to loose F-connectors &/or corrosion due to water getting inside those connectors. There might also be actual physical damage to the cables themselves. Unfortunately (for you!) any buried cables would definitely be prime suspects for corrosion damage! PS: also agree with [USER=415764]@Manikm909[/USER] about the junction box (whatever that is - pictures might well help??) [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Strange problem with no power to motor
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