Toshiba D-VR3SU Service Manual page 135

VIDEO IN
BPF
fh
VC0
1/8
320fh
D/C
320fh = 5.03MHz
fh = 15.734 KHz
Fig. 7-22 Block Diagram of Color REC mode by the method of a Down Converter
PB COLOR IN
LPF
40th = 629KHz
fh
VC0
1/8
320fh
D/C
320fh = 5.03MHz
fh = 15.734 KHz
Fig. 7-23 Block Diagram of Color PB mode by the method of a Down Converter
MAIN
CONV ( - )
fs = 3.58MHz
BPF
fs + 40th = 3.58MHz + 0.62MHz = 4.2MHz
SUB
CONV ( + )
40th = 629KHz fs = 3.579545MHz
MAIN
CONV ( - )
BPF
fs + 40th = 3.58MHz + 0.62MHz = 4.2MHz
SUB
CONV ( + )
40th = 629KHz fs = 3.579545MHz
LPF
40th = 629KHz
X'TAL
OSC
BPF
X'TAL
OSC
Circuit Operating Descriptions
REC OUT
fs
PB OUT
fs = 3.58MHz
fs
7-35