Samsung DVD905 Service Manual page 51

Reference Information
4. Low pass filter VFLT2, VFLT4
VFLT2 and VFLT4 remove quantization noise occurring in the course of D/A conversion as low pass filter with
cut-off frequency of 6.75MHz.
GAIN(dB)
0(dB)
-3(dB)
5. Switch
This system selects and outputs RGB or Y/C by register setting of STV0119. If Y/C is selected, Y/C signal is
outputted to Y/C jack and RGB jack. These signals are abnormal and had better not to be outputted, seeing in
RGB jack. It is same at RGB output. So, analog switch VIC32(14053) is used.
RGB
or
Y/C
RGB/YC
2-32
Fig. 2-53 Frequency features of VFLT2/VFLT4
Fig. 2-54 RGB, Y/C switching
6.75MHz
Switch
VIC32
14053
Y/C
output
RGB
output
Samsung Electronics