Onkyo TX-SR55 Service Manual page 27

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A
SCHEMATIC DIAGRAM 9
P121A
1
IRIN
2
+56S
3
GNDCPU
4
12VTRGC
5
GND
1
6
+12VTRG
7
12VTRGB
8
12VTRGA
9
IRABUS
10
Z2PLMUTD
11
Z2_R
12
Z2_L
13
-12VA
14
GNDA
15
+12VA
4
5VCPU
3
232TX
2
232RX
1
GNDCPU
P103A
2
9
-12VA
8
GNDA
7
+12VA
6
-5VVIDEO
5
GNDV
4
+5VVIDEO
3
SPRLF
2
SPRLSB
1
VMUT
P2005A
14
OSDCLK
13
OSDCS
12
OSDSDO
11
VSYNC
10
SYNC
9
ISS
8
VDSTB
7
VDSDO
6
VDCLK
5
VIDEORSV
3
4
VCSCL
3
VCSDA
2
GNDPO
1
SW_PO
P2004A
P701
1
RESET
2
CNVSS
3
232RX
4
FCLK
5
VCC
6
FBUSY
4
7
232TX
8
GNDCPU
P702
1
6
FBUSY
2
7
232RX
3
8
FEPM
4
9
RESET
5
10
232TX
CNVSS
GNDCPU
FCE
FCLK
VCC
5
B
Microprocessor section
U2
NADG-8366
1/50
+
C707
EDLC
C704
0.22F
100
R832
+
C703
+
1/50
+
C702
1/50
1M
R811
104K
C705
C701
1/50
1SS355
R815
D705
+
47K
D704
D711
UDZS5.1B
UDZS13B
R860
10K
C
10K
R805
104Z
FLCS
104Z
220
FLSDO
220
FLCLK
220
FLRST
220
10K
220
220
220
10K
10K
CNVSS
10K
10K
RESET
104Z
POFF
R806
10K
1K
R812
R813
1K
104Z
R820
10K
220
VCC
R821
10K
NAAR-8365 (SCH. 1)
TX-SR55
D
NADIS-8406 (SCH. 7)
R837
2.7K
R838
2.7K
R839
2.7K
R840
2.7K
1
C708
2
C709
3
R701
4
R702
5
P95/ANEX0/CLK4
R703
6
P94/DA1/TB4IN
R704
7
P93/DA0/TB3IN
R705
8
P92/TB2IN/SOUT3
R706
9
P91/TB1IN/SIN3
R707
10
P90/TB0IN/CLK3
R708
11
P141
R709
12
P140
R710
13
BYTE
14
CNVss
15
P87/XCIN
R711
16
P86/XCOUT
R712
17
RESET
18
Xout
19
Vss
20
Xin
C710
21
Vcc1
10K
R713
22
P85/NMI
220
R714
23
P84/INT2
220
R715
24
P83/INT1
220
R716
25
P82/INT0
220
R717
26
P81/TA4IN/U
220
R718
27
P80/TA4OUT/U
220
R719
28
P77/TA3IN
220
R720
29
P76/TA3OUT
220
R721
30
P75/TA2IN/W
10K
R722
31
P74/TA2OUT/W
10K
R723
32
P73/CTS2/RTS2/TA1
220
R724
33
P72/CLK2/TA1OUT/V
10
R725
34
P71/RXD2/SCL2/TA0
10
R726
35
P70/TXD2/SDA2/TA0
220
R727
36
P67/TXD1/SDA1
C711
37
Vcc1
R728
38
P66/RXD1/SCL1
R814 10K
R817 10K
R816 10K
R818 10K
R819 10K
R823 10K
R822 10K
R824 10K

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