Onkyo TX-NR801E, Service Manual

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