Panasonic M17W movement widescreen TV Y / C separation circuit schematics and repair -Service Manual Download|Circuit Download|Download Drawings|schematic download|route map download|free download user manual

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Panasonic M17W movement widescreen TV Y / C separation circuit schematics and repair

Time：2014-06-10 09:53:15 Source：Network Author：Unknown Clicks：1580

Table 1
Video signal and system, SYS SYS1 (IC1213ts36-1. GIF (124 bytes)) SYS2 (IC1213ts36-2. GIF (124 bytes)) SYS4 (IC1213ts36-3. GIF (116 bytes))
Black and white (B/W) H H L
PAL H H H
NTSC3.58 system L L L
NTSC4.43 system H L H
SECAM system H H L

Comb filter logic circuit the brightness of the isolated signal after notch filter treatment to the D/A conversion circuit into analog luminance signal from IC5501ts15-10. GIF (127 bytes) output. The notch filter controlled by the input signal level (2 feet: when the input (2 feet high electricity at ordinary times, trap is disconnected, the brightness of the input signal without notch effect; When (2) feet input low electricity at ordinary times, trap began to work. The machine for (2) the feet, through the resistor R5588 + 5 v power supply, make the trap constant in the off state. IC5501ts15-10. GIF (127 bytes) feet output luminance signal Q5507, Q5506, Q5505 buffer to big IC5502ts44. GIF (124 bytes).
Comb filter isolated digital logic circuit chroma through band-pass filter to the D/A circuit converts analog chroma from IC5501ts09-3. GIF (113 bytes) output. And the band pass filter is also affected by IC5501 attending, ts09-4. GIF (120 bytes), ts18. GIF (115 bytes) feet input level control and transformation between the 4.43 MHz and 3.58 MHz, but also controlled by input level 5, 6 feet. IC5501ts09-3. GIF (113 bytes) feet of chroma output via Q5504 inverting amplifier with Q5503 shot to IC5503 (5), with the buffer before ts44. GIF (124 bytes).
Another IC5501 comb filtering logic circuit in the working state under the control of the input level IC5501 (4) feet: when the input (4) feet high electricity at ordinary times, the constant work in digital comb filter; When 4 feet input low electricity at ordinary times, work in bandpass filter. Because of the machine (4) the feet, through the resistance R5559 + 5 v power supply, make IC5501 always work in the comb filtering state. IC5501 D/A, A/D and other digital circuit work normally required for the clock signal by its ts14-2. GIF (109 bytes) feet input color subcarrier sync signal after plastic internal clock circuit.

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