Question about Samsung Televison & Video
As with other post where the detail of the make,model,series,ect. are not given this is a short generic description for Plasma screens. First of all as the plasmas tend to be relegated to the large screen environment. LCD's have only recently begun (era 2009-2011 ) to be manufactured in quantities with sizes larger than the 32"-42' sizes.
The Plasma and LCD apparatus are two very different pieces of equipment which accomplish the same task. The myths and misinformation abound for the operational phases of both . ie;
Dark picture with sound on a LCD would usually represent an inverter or back light failure.
Dark picture with sound on a Plasma ( which do not utilize the inverter / back light setup ) could represent a partial failure of the main power supply, an out of range video signal, thermal shut down of one or more power/regulators in section/group boards after the main power section/group board. Such as leaking/blown capacitors ( yes remnants of the capacitor plague are still with us) on the Video Group output section. In the afore mentioned scenario , the video would fail but the sound which is a separate circuit, group, and power rail would continue uninterrupted.
Plasmas like LCD are not mythical, rocket science, or magic. They just require a knowledge which is not familiar. A schematic or block diagram is a good start. A thorough knowledge signal circuitry and power circuitry help.
Where as I am awaiting approval under "fair use" to use a plasma schematic particular to a known brand, I cannot upload the item at present. I am currently seeking a good generic diagram/roadmap to illustrate the general layout in hopes making this a little easier to visualize.
Posted on Mar 07, 2011
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