xukaplasma 0 Posted January 10, 2010 Hi everybody, I'm a new guy. My AVC 785 have a problem : When supply the voltage 19VDC into socket of AVC 785, the sound is always come out (normally the sound just buzz a few second then gone). the sound always come out so I can do anything. All indication LED is light. What's problem with my AVC 785 ? Please help me Thanks in advance. Share this post Link to post Share on other sites
scorpion 0 Posted January 12, 2010 Do you have a microphone hooked up to the DVR? Share this post Link to post Share on other sites
john338 0 Posted January 13, 2010 I've the same problem,I found that the power supply PCB board is broken. Where can I order a new one or get a circuit diagram of that board so that I can repair it myself? Share this post Link to post Share on other sites
scorpion 0 Posted January 13, 2010 The power supply boards are not available from any source. When you can find them you may find them priced starting at over $50.00, and $100.00 would be more the norm. As for repairing the board: This should be "easy" for any electronic tech. If they charge $50.00 per hour for repair then it may not be worth repairing. If you are good with the soldering iron, and you can get all the parts then replace everything. If you have the knowlege to test the parts individually then you can selectivly replace the bad parts. Share this post Link to post Share on other sites
john338 0 Posted January 13, 2010 The IC of the power boards with part no. AP1531 is difficult to find. Share this post Link to post Share on other sites
