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Tech Head - The Technology Section
The Work Bench and Soldering Station
Schematic For Echostar AD3000ip Power Supply
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<blockquote data-quote="vlammie" data-source="post: 473483" data-attributes="member: 270173"><p>Hi Llew</p><p></p><p>My ad-3000ip has given up again recently. Again ticking sounds came out of the cabinet (and flickering display). I have investigated the power supply separately again. Turned out that I could not switch it On and Off with PCS line. Finaly replaced Q2 for a BC237 which solved this issue. Put it back in, but the receiver still had the same problems. Tried to load the outputs of the device as it seems that the PSU is switching On and Off. If I load the 5 V output with 18 ohms resistor it is already breaking down. Anybody any idea how much current can be drawn from 5V digital. Expect that it should be much more then just 300 mA as I am trying now.</p></blockquote><p></p>
[QUOTE="vlammie, post: 473483, member: 270173"] Hi Llew My ad-3000ip has given up again recently. Again ticking sounds came out of the cabinet (and flickering display). I have investigated the power supply separately again. Turned out that I could not switch it On and Off with PCS line. Finaly replaced Q2 for a BC237 which solved this issue. Put it back in, but the receiver still had the same problems. Tried to load the outputs of the device as it seems that the PSU is switching On and Off. If I load the 5 V output with 18 ohms resistor it is already breaking down. Anybody any idea how much current can be drawn from 5V digital. Expect that it should be much more then just 300 mA as I am trying now. [/QUOTE]
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Tech Head - The Technology Section
The Work Bench and Soldering Station
Schematic For Echostar AD3000ip Power Supply
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