Onkyo TX-L55 Service Manual page 33

IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS(LR552 only)
LA7106MFP(75 ohm video driver)
BLOCK DIAGRAM
1
VIN1+
2
NFB1
6dB
3
MUTE1
4
VIN2+
5
NFB2
6dB
6
-VCC1
7
VIN3+
8
6dB
NFB3
MM1093NF(4fsc clock generator)
OSCILLATOR R
Vcc1
Vcc2
OSCILLATOR C
APC2 FILTER
4fsc OUTPUT
BURST GATE FILTER
COMPOSITE INPUT
DR
DR
DR
9
10
4fsc
VCO
11
12
APC2
13
BGP
14
GEN
15
SYNC
16
SEP
MM1512(Y-C mixer circuit)
+VCC
16
VOUT1
15
Clamp
YIN
6
CIN
4
GND
14
VOUT2
13
DR CTL
12
VOUT3
11
MUTE2
10
-VCC2
9
DIVIDER
fsc
(1/4)
VCXO
APC1
2nd
ACC
BPA
DET
1st
BPA
Vcc
3
Bias
DRV
12dB
-6dB
5
GND
NC
8
fsc OUTPUT
7
GND2
6
GND1
5
X'TAL
4
APC 1 FILTER
3
ACC FILTER
2
CROMA INPUT
1
TX-LR552
SAG
1
2
OUT