Onkyo TX-NR801E, Service Manual

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TX-NR801
IC BLOCK DIAGRAMS AND DESCRIPTIONS
VDD
R-TVR-REF
R-TVR-IN
R-TVR-OUT
R-MVR-OUT
R-MVR-AGND
R-MVR-IN
CS2
STB
DATA
24 bit Shift Register
Circuit
Level Shift Circuit
Main volume
0 to -95 dB
1 dB step
Main volume
0 to -95 dB
1 dB step
3 to 9 Decoder & Latch Circuit
4 to 13 Decoder & Latch Circuit
3 to 9 Decoder & Latch Circuit
4 to 13 Decoder & Latch Circuit
VSS
L-TVR-REF
L-TVR-IN
L-TVR-OUT
L-MVR-OUT
L-MVR-AGND
L-MVR-IN
CS1
GND
CK
Trim volume
0 to +24 dB
1 dB step Trim volume
0 to +24 dB
1 dB step
5 to 25 Decoder & Latch Circuit 5 to 25 Decoder & Latch Circuit
1
2
3
4
5
6
7
9
11
12
24
23
22
21
20
19
18
16
14
13
8,10,15,17:NC
Q4200~Q4203 TC94A07F(Electric Volume)
No. Symbol Terminal
1 VSS
Negative power source
24 VDD
Positive power source
11 GND
Digital ground
2 L-TVR-REF
23 R-TVR-REF
3 L-TVR-IN
22 R-TVR-IN
4 L-TVR-OUT
21 R-TVR-OUT
5 L-MVR-OUT
20 R-MVR-OUT
6 L-MVR-AGND
19 R-MVR-AGND
7 L-MVR-IN
18 R-MVR-IN
8 CS1
16 CS2
12 CK
Clock input
13 DATA
Data input
14 STB
Strobe input
8
10
15
17
Trim volume analog
reference terminals
Trim volume input
terminals
Trim volume output
terminals
Main volume output
terminals
Main volume analog
reference terminals
Main volume input
terminals
Chip select code switch
terminals
No connection
NC
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