Toshiba RD-XS24SB Service Manual page 161

13. Circuit Operating Descriptions
13-1 Video Block
If you want to know the detail, refer to each IC's sheet data.
Sheet data contains detailed functions of each IC.
Video signals(C,Y,CY,Cb,Cr)
output to video amp.
LOADER
MAIN
HDD
This IC has 4 inputs
and 2 ouputs for
video and has audio
and video swicher
with I C bus for two
2
SCARTS(AV1,AV2).
Each inputs and out-
puts channels are the
same as this block
diagram.
MM1568 is 9dB video amplifier. This IC amplifies signals which received
from main board and outputs CVBS, S-VIDEO, Component signals.
CVBS
C
Y
VIDEO AMP
VIDEO SIGNALS
VIC05
MM1568
CY
Cb
Cr
CVBS_IN
CANAL IC
SCART1_OUT
SIC01
SCART1_IN
MM1647
SCART2_IN
SCART2_OUT
CVBS_IN
SCART1_IN
MUX
SCART2_IN
VIC01
TUNER_IN
74HC4051
FRONT_IN
74HC4051 is analog Mux for
swiching video inputs. Swiching
logic controls are performed by
front micom(MIC01). Swiched one
input output to main board.
SWITCH
VIC02
MM1507
SWITCH
VIC03
MM1508
MM1508 is switching IC
which has 6dB amp.
Switching video signals
from MM1647 and
tuner, output to Scart2.
Fig. 13-1
SWITCH
VIC07
MM1503
RGB DATA
FOR AV1
RGB
SCART
AV1
(TV)
SCART
AV2
(EXT)
TUNER
2 by 1 switching IC to
select C and Cr data.
CVBS_OUT
S_OUT
COMPONENT_OUT
FRONT-IN
13-1