Microprocessor Section; Poff2 - Onkyo TX-SR875 Service Manual

A
SCHEMATIC DIAGRAM-8 (SD-8)

MICROPROCESSOR SECTION

1
2
3
4
<Note>
SD-x:XY is short for Shcematic Diagram-x and
each socket's location, X=A to H, Y=1 to 5.
NOTE
THE COMPONENTS IDENTIFIED BY MARK
REPLACE ONLY WITH PART NUMBER SPECIFIED.
VOLTAGE (MEASURED WITH VOLTMETER)
5 ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS (
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030- 3pF, 330- 33pF, 331- 330pF, 333- 0.033uF
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
B
NAAR-9075
U28 MICROPROCESSOR PC BOARD
1 MPOWER
2 GNDDG
3 FTXD
4 FBUSY
5 +3.3VST
6 FCLK
7 FRXD
8 CNVSS
9 RESET
C7002
4.7/50
104Z C7003
47K R7267
R7001
SRTXD
SRRST R7002 47
FANCTRL
CECIN
R7003 47
XMTXD R7005 47
XMRXD
R7006 220
XMRST R7007
47
XMRSV1 220
RDSCLK R7008
RDSSDI
STEREO R7011 1K
SD 1K
R7012
R7016
10K
CNVSS
R7018
NETSTATUS
RESET 220
X7001
8.00MHz
C7005 104Z
POFF 1SS352 D7002 R7024 10K
1SS352

POFF2

KEYINT1 D7003 R7027 4.7K
CECTRG
CECOUT
Z2VOLCLK R7030 47
R7031 47
Z2VOLSDO
XMRSV2 R7032 220
VSPRDY/VDLOCK R7033 220
R7034 47
VSPRST
R7035 47
VSPREQ/BOOT
VSPRXD/VSPSCL 47
R7036
+5.0V
RN2402
Q7352
105K
C7352
!
ARE CRITICAL FOR SAFETY.
IS DC VOLTAGE.(NO INPUT SIGNAL).
) ARE IN uF/WV.
+3.3V
47
1 P96
2
3
4
5 P92
6 P91
7 P90/TB0IN/CLK3
8 P146/INT8
9 P145/INT7
10 P144/INT6
144:P97/ADTRG/RXD4/SCL4/STXD4
11 P143/INPC17/OUTC17
2:P95/ANEX0/CLK4/CAN1IN/CAN1WU
12 P142/INPC16/OUTC16
3:P94/DA1/TB4IN/CTS4/RTS4/SS4
13 P141/INPC15/OUTC15
4:P93/DA0/TB3IN/CTS3/RTS3/SS3
14 P140/INPC14/OUTC14
Q7001
15 BYTE
16 CNVSS
17 P87/XCIN M3087BFKBGP
18 P86/XCOUT
19 RESET MAIN MICROPROCESSOR
20 XOUT
26:P83/INT1/CAN1IN/CAN0IN
21 VSS
27:P82/INT0/CAN1OUT/CAN0OUT
22 XIN
29:P80/TA4OUT/U/ISRXD0/RXD5
23 VCC1
35:P72/TA1OUT/V/CLK2
24 P85/NMI
25 P84/INT2
26
27
28 P81
29
30 P77
31 P76
32 P75
33 P74
34 P73
35
36 P71
+3.3V
2.2K
R7271
R7272 10K
R7273 10K
R7351
10K
R7355
10K
RN2402 RN2402
Q7356 Q7362
RN1404
RN1404 RN1404
Q7351 Q7355 Q7361
R7352 R7356
2.2K 2.2K
105K 105K
C7356
C7362
C
R7290
10K
10K
R7289
+3.3V
0
R7213
R7213
10K
R7212
DC Type only
10K
R7211
10K
R7210
C7016
102K
102K
C7015
R7301
10K
10K
R7288
C7014 104Z
104Z
C7013
R7302 10K
R7108
108 47
P11/D9
107 220 R7107
P12/D10
106 47 R7106
P13/D11
R7105
105 47
P14/D12
104 220 R7104
P15/D13/INT3
103 220 R7103
P16/D14/INT4
102 220 R7102
P17/D15/INT5
101 220 R7101
P20/A0(/D0)/AN20
100 220 R7100
P21/A1(/D1)/AN21
99 220 R7099
P22/A2(/D2)/AN22
98 47 R7098
P23/A3(/D3)/AN23
R7097
97 47
P24/A4(/D4)/AN24
96 220 R7096
P25/A5(/D5)/AN25
95 47 R7095
P26/A6(/D6)/AN26
R7094
94 47
P27/A7(/D7)/AN27
93 R7282
VSS
92 220 R7092 10K
P30/A8/(D8)
91 104Z C7012 R7281 10K
VCC2
90 47 R7090
P120/TXD6
R7089
89 47
P121/CLK6
88 220 R7088
P122/RXD6
R7087
87 47
P123/CTS6/RTS6
220 R7086
86
P124
85 47 R7085
P31/A9/(/D9)
R7084
84 47
P32/A10/(/D10)
220 R7083
83
P33/A11/(/D11)
82 47 R7082
P34/A12/(/D12)
R7081
81 220
P35/A13/(/D13)
80 R7080
47
P36/A14/(/D14)
79 220 R7079
P37/A15/(/D15)
R7078
78 47
P40/A16
77 R7077
47
P41/A17
76
VSS
R7075
75 47
P42/A18
74 104Z
VCC2
73 C7011
P43/A19
47 R7073
+3.3V
R7275
10K
+3.3V
R7365 10K
R7361 10K
D7381
RN2402
1SS352
+5.0V
Q7366
D7382
RN1404
1SS352
Q7365
R7366
2.2K
+3.3V
C7392 100/16
C7391 104Z
D7383
1SS352
1 CS 8
VCC
10K
2 SO 7
HOLD
D7384
3 WP 6
R7392
SCK
1SS352
4 GND 5
SI
R7391
IS25C64A
Q7391
10K
TX-SR875
D
10K
R7287
DTA114YKA
R7286
Q7006
DTC114YKA
100
Q7005
HPRL
MICDET RI
MICMUTE
SYSOUT
SYSIN
DSP1NIC
REMIN
THERMAL1
Q7007
THERMAL2
DTC114YKA
VOLH Q7003
DTA114YKA
MPOWER
VPOWER
MEQMUTE
APOWER1
+3.3V +5.0V
APOWER2
PROTECT
DIGSDO
DIGCLK
DIGSDI
DIRRST
DIRINT
DACRST
DSP1RST
DSP1INT
DSP2RST
DSP2INT
DSP3RST
DSP3INT
VOLCLK
VOLSDO
VOLCS
VOLMUTE
+3.3VST
+3.3VMPU
S812C33AUA-C3G-T2
Q7385
+3.3V
3
2 I
O
R7371 D7372
47 1SS352
+5.0V
+5.6V
S812C56AUA-C3G-T2
Q7381
2 I 3 +5VST
O
D7371
1SS352
+3.3VMPU
+5VM
+5.0V
XC6213B332MR
XC6202
Q7262
Q72
5 1
+3.3V VOUT VIN O
2 1
VSS G
4 3
NC CE