Pioneer DVL-909 Service Guide - Page 11

2.1.3 Analog Video Signal Processing Block The video signals output from the built-in 10-bit DA converter of the M65677FP pass through a low-pass filter and amplifier, and are output from the DVD MAIN Assy and sent to the VOUT Assy. In the VOUT Assy, analog noise-reduction processing having three levels (OFF, low, and high) is initially applied only to the Y signal. This analog noise reduction is the same as that performed by conventional laser-disc players. The register port output in serial communication that the PD0259A receives from the system-control computer is used as the control signal for analog noise reduction. After analog noise reduction, a CVBS signal is generated by composing the Y and C signals (no clamping is performed for the C signal). The timing pulse BF to be used for pedestal clamping is supplied from the PD0259A. This signal is adjusted within the PD0259A so that it provides the timing for the burst portions of the output video signals. DV-505, DVL-909, DV-S9 4M DRAM µ-COM × 2 IC801 MB86371 (AV1) V DATA H V FLD CLK IC901 PD0259A (DNR) V DATA H V CLK µ-COM Cb LPF IC951 M65677FP NTSC ENCODER Cr LPF Amp. Amp. BF ANR1 ANR2 IC952 Y LPF M65677FP NTSC ENCODER C LPF Amp. Amp. Analog NR CLAMP Cb CLAMP Cr CLAMP Y CLAMP Y C DVD MAIN ASSY CLAMP V OUT ASSY CVBS 11