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Inop 14" B&W CCTV monitor

Monitor made in China for ADT used by Lorex for 4-camera security system. Power supply inop. Has three outputs: one for TV chassis,one for the cameras and the third for another pcb I have not studied yet. Data on the plate is: Model HD14Q2144-A serial Q0305-0150B. 100-240 v, 50-60 Hz. Power supply pcb has: HGF-SF33.PCB.B, 2003-02-12, SF7.320.141B.
I am sure the problem is in the power supply since none of the outputs show any voltage at all no-load.

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  • Karl Shumaker Dec 06, 2008

    The situation here is the company is so tight they will not approve a purchase replacement. So, if we want the system to work we gotta fix it! That means I am back to the schematic and reference voltages.

    Karl


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You are correct. The power supply (trace) is a very high voltage device. If it goes out, you will receive no power anywhere in the unit. It will most likely be cheaper just to replace the monitor.

Posted on Dec 06, 2008

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