Toshiba LCD TV 32AV550C machine boot, the speaker emits self-exciting harsh sound, with sound and small, first use the signal to inject the power amplifier R2A15112, the 12.25 foot sound is loud, look forward to R2A15213, sound processing block, use 1UF electrolysis to exaggerate the input and output feet The self-excited sound is reduced, so the peripheral chip capacitor is replaced. When the 10UF capacitor is used to replace the 1-pin capacitor, the fault disappears.
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