Samsung DVD-VR320/COM, Manual

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Circuit Operating Descriptions
Samsung Electronics 14-9
14-4 Video Input
14-4-1 Video Input Outline
DVD-VR320 is the two Line Video input. Line 1 Video input is CVBS1 & S-Video1 at the Rear Panel. Line 2 Video
input is CVBS2 at the Front Panel.
The analog Video signal select Line 1 or Line 2 by the IC601 (Front Micom).
TIC1 (Video Decoder) diverges from the 27MHz crystal, then generates ITU-R656 (10bits) and 27MHz clock.
TIC1 (Video Decoder) does closed caption, copy guard detect processing and A/D conversion of analog Video
signal converted into 11bit Digital Video signal (ITU-R656 Format) is outputted via DIC1 (MPEG2 Decoder &
Encoder with video Encoder) of digital part.
Line 1
(Rear)
Video
Input
CVBS 1
Y1
C1
Line 2
(Front)
Video
Input CVBS2
TEA6425
Analog
Mux
IC801
Video
Decoder
TIC1
A/V CODEC
DIC1
CVBS
Y
C
ITU-R656 10bit
27MHz
V_SYNC
SDA
SCL
/RSTAV
CVBS
RF
Fig. 14-8
14-4-2 Analog Mux (TEA6425)
IC801 is Analog Mux.
As Pin 9, 10 of the IC801 are controlled by the Front Micom, IC801 select RF OF CVBS(Pin1) AV1 of CVBS[Pin6]
and AV2 of CVBS[Pin 5].
The analog Video Signal of IC801 output is selected by the ic601 via TIC1(Video Decoder : TW9909) of analog Video
input parts.