Samsung DVD-909 Service Manual page 75

Circuit Descriptions
6-6-4 Scart Jack Output
The AV1 of scart jacks is used for connecting a TV or other display devices and the AV2 for a VCR or other players.
When the DVD player is turned on, the RGB, CVBS, or S-VIDEO is outputted to AV1 and CVBS to AV2. When the
player is turned off, CVBS signal of the TV is inputted and CVBS or RGB of a VCR inputted via AV2 is outputted.
In case of AV2, the reverse signal flow to that.
Switching of power on/off is controlled by SCIC1, SCIC2, and SCIC5.
The control signal (Pin 9,10,11) of SCIC1 and SCIC2 is outputted from PIN100 of FIC1 and connected to the sig-
nal(Pin 4) inverted by FIC3.
The control signal(Pin 9,10,11) of SCIC5 is also outputted from Pin100 of FIC1 and inverted again by SCQ8.
According to the characteristics that SCART Jack is supplied same pins for the output of CVBS signal and Y signal
and for the R signal and C signal, SCIC3 lets the user select two signals in setup menu.
This control signal (Pin 9,10,11) of the switch is outputted from Pin 92 of FIC1.
The signal selected by switch is amplified by SIC4 and SIC6 and outputted through the SCART jack.
The scart jack has the function select signal (Pin 8 of AV1) that the TV can select automatically RF and the external
video signal.
SCQ1 to SCQ7 are the circuit to point, FIC1 (Pin100, 94) controls. When the TV aspect ratio is 4/3 or 16/9, it is out-
putted 4.5 ~ 7V or 9.5 ~ 12V each. But, when the DVD video source is 16/9 and 16/9 wide is selected in setup
menu, 4.5 ~ 7V is outputted. Otherwise, 9.5 ~ 12V is outputted.
When the player is turned off, the TV works with function selection by output signal of VCR in relation of SCQ9
and SCQ10.
RGB control signal (Pin 16 of AV1) is outputted that the TV can select between RGB and CVBS.
SCQ11 ~ SCQ14 and SCQ17 are for RGB control and controlled by FIC1 (Pin91).
When the player is turned off, receives VCR input (Pin 37 of AV2) and buffers in this circuit and then outputs to
Pin 16 of AV1.
CVBS_VCR_IN
SIC2
(14053)
Switch
CVBS_S
CVBS_TV_IN
SIC1
(14053)
Switch
6-18
Y_S
SIC3
(14053)
C_S
Switch
R_S
R_VCR_IN
SIC5
G_S
(14053)
G_VCR_IN
B_S
Switch
B_VCR_IN
Fig. 6-23
SIC4
(NJM2267)
Amplifier
CVBS_VCR_OUT
R/C_TV_OUT
SIC6
G_TV_OUT
(BA7660)
B_TV_OUT
Amplifier
CVBS_TV_IN
CVBS/Y_VCR_OUT
R_TV_OUT
AV1
G_TV_OUT
TV
B_TV_OUT
R_VCR_IN
AV2
G_VCR_IN
VCR
B_VCR_IN
CVBS_VCR_OUT
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