Onkyo TX-NR801/E Service Manual page 48

IC BLOCK DIAGRAMS AND DESCRIPTIONS
TA8772AN(PAL/SECAM/NTSC Base Band 1H Delay System for TV or VCR)
30 29 28
Clamp
x1 or x1/2 x1 or x1/2
Pulse
Pulse
Remove
Remove
+
+
1 2 3
Pin No. Pin Name
1 R-Y Clamp Det. This is a terminal for detecting DC clamp level of R-Y signal.
28 B-Y Clamp Det. This is a terminal for detecting DC clamp level of B-Y signal.
2 R-Y to CCD
3 B-Y to CCD
4 R-Y AGC Det.
8 B-Y AGC Det.
5 Vcc
6 Filter Adj.
7 S.C.P. In
9 PLL Det.
10 Clock
11 Clock In
12 Vss
13 V
IN1
15 V
IN2
14 V
DD
16 V
OUT2
19 V
OUT1
17 V
OB2
18 V
OB1
20 V
GG
21 GND
22 R-Y from CCD
23 B-Y from CCD
24 MODE SW1
25 MODE SW2
26 B-Y In
27 R-Y In
29 B-Y Out
30 R-Y Out
27 26 25 24
Clamp
AGC
Pulse
Pulse
Ins. Det.
Ins.
AGC
Det.
Pulse
HP.GP
4 5 6 7
Function
This is output terminal of R-Y signal. To pin 15.
This is output terminal of B-Y signal. To pin 13.
This is a terminal for detecting AGC.
This is a terminal for detecting AGC.
Power supply terminal for supplying 9V.
This is connected to GND via 10kohm.
This is the input terminal for S.C.P.
This terminal outputs result of phase comparison between interval VCO and horizontal input signal.
This terminal outputs clock pulse which is used by CCD circuit.
This terminal receives clock pulse for CCD circuit.
This terminal is Vss terminal for CCD. Connect to GND.
This is input terminal of B-Y signal for CCD circuit.
This is input terminal of R-Y signal for CCD circuit.
Power supply terminal for supplying 5V
This terminal outputs delayed signal of R-Y.
This terminal outputs delayed signal of B-Y.
This terminal controls output DC level of pin 16.
This terminal controls output DC level of pin 19.
This terminal is applied Vccx2 voltage by internal voltage booster.
Ground terminal
This is input terminal of delayed R-Y signal.
This is input terminal of delayed B-Y signal.
This terminal controls the gain of internal circuit for PAL, SECAM, or NTSC.
This terminal controls switch of calculator for delayed signal and direct signal.
This is input terminal of B-Y signal.
This is input terminal of R-Y signal.
This is output terminal of B-Y signal.
This is output terminal of R-Y signal.
23 22 21 20
Bip. Block CCD Block
LPF
LPF
AGC
AGC
Clamp Clamp
1/225
225fH
Clock
Det.
VCO
8 9 10 11
48
TX-NR801/E
19 18 17 16
REF
REF
S/H
S/H
CCD 1H CCD 1H
Ave
Bias
12 13 14 15