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the first problem was that a picture froze on the screen and never left , it was still frozen there...
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Problem for Hitachi 55HDT79 55 in. HDTV Plasma Television
Have a line running thru my screen. hitachi
Solution #1
posted on Oct 19, 2009
he Control PWB only causes this defect when the Backlight Control Signals are Output from the Control PWB No LVDS(Low Voltage Differential Signaling) signal may also result in this symptom
LVDS is a differential signaling system, which means that it transmits two different voltages which are compared at the receiver. LVDS uses this difference in voltage between the two wires to encode the information. The transmitter injects a small current, typically 3.5 mA, into one wire or the other, depending on the logic level to be sent. The current passes through a resistor of about 100 to 120 ω (matched to the characteristic impedance of the cable) at the receiving end, then returns in the opposite direction along the other wire. From Ohm's law, the voltage difference across the resistor is therefore about 350 mV. The receiver senses the polarity of this voltage to determine the logic level. This type of signalling is called a current loop.
Its completely signal faults in your circuit board. So only its difficult to understand without yechnical knowledge.
You need to check the PWB or LVDS system.
LVDS is a differential signaling system, which means that it transmits two different voltages which are compared at the receiver. LVDS uses this difference in voltage between the two wires to encode the information. The transmitter injects a small current, typically 3.5 mA, into one wire or the other, depending on the logic level to be sent. The current passes through a resistor of about 100 to 120 ω (matched to the characteristic impedance of the cable) at the receiving end, then returns in the opposite direction along the other wire. From Ohm's law, the voltage difference across the resistor is therefore about 350 mV. The receiver senses the polarity of this voltage to determine the logic level. This type of signalling is called a current loop.
Its completely signal faults in your circuit board. So only its difficult to understand without yechnical knowledge.
You need to check the PWB or LVDS system.
Yes
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