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I am attempting to repair a Digimerge VCE 308301 (the 8 channel network DVR system) The client is able to view the setup menu but unable to to get an output signal from the cameras. The system runs it is in record mode -the record indicator, date, and time are visible on the screen- however the multi-play display screen for each camera is blank. Is the main board's (DNC1109) and daughter board's (DNC2103)video card fried? How do I obtain a schematic on the system? Thank you. Respectfully yours- John- Ash Creek Computer Repair

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The problem did not have anything to do with the DVR (Digimerge VCE 308301). It did however, have everything to do with the cameras' power supply system.

First, I contacted the company's (Digimerge) tech department; and they were of no help since the DVR system is obsolete. There are no replacement/spare parts available; e.g. mainboard and daughter boards...and of course, they don't have schematic diagrams for the DVR either. And due to its obsolesence- there is no tech support. (It makes me wonder why, though, how security and electronic vendors can in good conscious sell this obsolete model DVR for $1,400 and upwards of $2,200.00 to the unsuspecting consumer/end-user.)

Since I was able to boot up the DVR system and access the BIOS menu; and considering that the screen was showing that it was in record mode- and the system BIOS was keeping the proper date and time, I believed that there was something else going on with the security system.

I contacted the customer and went out to their home- as I was about to hook up the cameras to each input behind the DVR- by happenstance, I checked the power supply panel to make sure that the power supply had been turned off (which the home owner failed to do). Having turned off the cameras' power supply, I then made all my camera hook-ups to the DVR. When I turned the power supply to the camera system on, I was able to get a video signal, hence a nice clear picture. I did check the voltage draw on each power terminal at about 12.5 vdc and a visual check on the infra- red led's on each of the security cameras were lit.

Problem solved, right!?...WRONG!

Several hours later, I received a call from the homeowner that his security system was not working again. The first thing I noticed as I pulled into the customer's driveway was that all the cameras' infra-red led's were out. I immediately placed my volt meter on the output side of the transformer at each of the cameras' power terminal- and waddya' know- I was barely reading over 1 vdc. Apparently- over time, the transformer starts to overheat and the voltage drops out. After it cools down though, the voltage resumes to 12.5vdc to power up the cameras.

This is my first experience working on a secuirty camera system so I hope this has been as much of a learning experience for you novices as it has been for me!



Posted on Oct 02, 2009

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