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vf15 / FP15 / f1523 / FP5315
11. Audio circuit (Circuit diagrams Main PWB)
11.1 Audio input
The audio signal input received from the audio input terminal (P302) is applied to the amplifier I301 of 1 and 9
through the low-pass filter consisting of R305, R306, C314 and C315.
In this amplifier, controls of Volume are availavle. The audio signal controlled at the VR601 determines the attenu-
ation of output of the amplifiers. Since then, the signal is output to the jack P303.
11.2 Audio output
The audio signal is output from the jack output terminal (P303) of the jack board to the internal speaker system.
