Onkyo TX-L55 Service Manual page 36

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TA1270BF(PAL/NTSC Video Chroma and Sync.
Processing system for PIP/POP/PAP)
DAC2
DAC1 39
DAC1
Y IN 40
PEDESTAL
DAC Vcc 41
(5V)
C Vcc 42
(5V)
UV/CbCr SW 43
fsc OUT 44
1HDL CONT 45
CONTROL
SECAM CONT
46
CONTROL
B-Y/Cb OUT 47
CbCr/UV
R-Y/Cr OUT 48
38 37 36 35 34
2
Y OFFSET
DAC I C BUS
SW TEST CONTROL
SUB-
Y DL
CONTRAST
CLAMP SW
fsc
Y DL
TRAP
SYSTEM
fsc
1H DL
SECAM
LPF/fsc
TRAP
BPF
SW
APC
VCXO
SUB
COLOR
1 2 3 4 5
33 32 31 30 29
PEDESTAL
Ys
CLAMP
OFFSET
SW
YUV RGB
MATRIX
CW
TINT
MATRIX
DEMO
P/N ID
NOSE
CHROMA
BLK
DET
SW
V
H. AFC
TOF SEP
SYNC
ACC
SEP
6 7 8 9 10
28 27 26 25
PEDESTAL
CLAMP
24
HI:2CH/LOW:24h
23
22
SW
21
SW
20
19
18
CP/HP
17
IN
16
H C/D V C/D
SCP
15
32fH
VCO
11 12 13 14
TX-LR552
SW GND
ADRS SW
R-Y/R OUT
B-Y/B OUT
Y/G OUT
SW Vcc
(9V)
SYNC Vcc
(9V)
CP/HP IN
Dig GND
SCP OUT