Onkyo TX-SR502 Service Manual page 32

MICROPROCESSOR CONNECTION DIAGRAMS-2
Q7502:MPD780232GC-XXX-8BT(SUB MICROPROCESSOR)
+5V
MDD, MDC TYPE ONLY
+5V
D7504
PURE AUDIO
Q7507
Q7504
BUFFER
P282
RI
MDD, MDC TYPE ---- PURE AUDIO
OTHER TYPE --- STEREO
MULTI CH
S7611
LISTENING
TONE+
S7612
LISTENING
TONE-
S7613
TONE
DISPLAY
S7614
STANDBY
S7615
SPEAKER B
MEMORY
S7616
SPEAKER A
S7617
HNA-16SM10T
40 P23
39 P24
38 P25
37 P26
Q7502
36 P27
35 P28
SUB-MICRO
34 P29
33 P30
PROCESSOR
32 P31
MPD780232G
31 P32
30 P33
29 P34
28 P35
27 PURE
NU: NO USE
26 NU
25 VDDO
24 AVDD
23 VSS0
22 K0
21 K1
D7505
STANDBY
Q7506
S7501
MASTER
VOLUME
DVD
PRESET>
S7621
S7631
S7641
VIDEO1
PRESET<
MODE<
S7632
S7642
S7622
DIVEO2
ENTER
MODE>
S7633
S7643
VIDEO3
S7623
TUNING>
S7634
S7644
TAPE
S7624
TUNING<
DIGITAL
S7635
INPUT
S7645
TUNER
RETURN
S7625
S7636
S7646
CD
SETUP
S7627
S7637
TUNING
S7647
MODE
S7638
Q7501
FL TUBE
P4 61
P3 62
P2 63
64
P1
65
16G
66
15G
67
14G
13G 68
12G 69
11G 70
10G
71
72
9G
8G 73
7G 74
6G 75
5G 76
4G 77
3G 78
2G 79
1G 80
5MHz
19
18
17
16
15
U7501
REMOTE SENSOR
TX-SR502/E/8250/HT-R520
Q7008
MAIN
MICROPROCESSOR