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9Nmservice manual download site
2. Only after receiving PAL/NTSC3.58 system signal achromatic color from figure 1, the chroma to IC5503ts44 NTSC3.58 for PAL system. GIF (124 bytes), (5) feet after all have their own transport channel, while both the channel circuit minimal damage to the cause of chroma signal loss probability, therefore IC5501 fault components should be comb filter and its ts09-3. GIF (113 bytes) foot external chroma buffer amplifier circuit. When maintenance measure IC5501ts09 first - 3. GIF (113 bytes) foot presence of chrominance signal output, if any, should check Q5504, Q5503 and bias circuit and signal coupling circuit component is damaged; If not, then respectively detect IC5501 (5), attending, ts09-4. GIF (120 bytes), ts18. GIF (115 bytes) feet voltage is normal (PAL reception when normal were 4.8, 4.9, 4.7, 4.9 V, in receiving normal NTSC3.58 system's signal were 0.1, 0.1, 0.1, 0.1 V). If these pin voltage is not normal, you should check the corresponding pin external components and circuit lines; If all normal, the judgment integrated block IC5501 damaged, need to change. 9Nmservice manual download site
3. The receiving system of PAL/NTSC3.58 video signal, the screen has a very dark color image distortion, and black and white reception, clear black and white images can be adjusted by the figure 1 shows that when the received signal is black and white TV signal, image clarity is adjustable, illustrating IC5502ts14-2. GIF (109 bytes) after foot luminance signal processing circuit works well, is this case fault source must be shown in figure 1 of comb filter circuits. Can appear on the screen distortion of color images that illustrate IC5501ts09-3. GIF (113 bytes) feet have chroma output; So in this case the fault source must be in IC5501ts15-10. GIF (127 bytes) circuit inside the foot or the external buffer amplifier circuits. When inspection, measuring IC5501ts15 first - 10. GIF (127 bytes) foot presence of luminance signal waveform output, if any, should be examined Q5507, Q5506, Q5505 and bias circuit and signal coupling circuit component is damaged; IC5501 (2) if not, then test the feet have a level higher than 4.5 V voltage. If the feet have a high level, should check and around IC5501 circuit element; If not, should check whether R5588 or whether the external circuit fault, open or at the foot of the IC5501 (2) the damage of internal short circuit, etc.
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