Mpu Section - Onkyo TX-8020B Service Manual

A B
SCHEMATIC DIAGRAMS-11(PART-11)

MPU SECTION

1
BADG-1474
U0035
MPU PC BOARD
2
SELB
SELA
LEDTHRU
FLDCS
FLDRST
KEYINT1
KEYINT0
3
+3.3V_TU
TUNER_L
TUNER_R
GND_DG
TU_SDA
TU_SCL
4
RDSI
C7115
L7101 R7178
101J RI
2
BK1608LM182-T
RI 3 470
1
TP7501
TP7502
4 3 2 1
P7102
NEJITANSI ST3
5
C
MODEL No. TX-8020 SCHEMATIC DIAGRAM Part-11
Q7053
KRA107S
or DTA114YKA
R7158 100
Q7051
KRC102S
Q7054 +3.3VMPU
KRA107S or DTC114EKA
or DTA114YKA R7160 EV+5.0V
100
SYSIN
R7161 Q7052
220K KRC102S
or DTC114EKA
SYSOUT
81
TP81
82
R7162 220
R7163 220 83
R7147 220 84
P04/AN04/D4
85
P03/AN03/D3
R7166 220 86
P02/AN02/D2
R7167 220 87
P01/AN01/D1
P07/AN07/D7
R7168 220 88 Q7101
P00/AN00/D0
P06/AN06/D6
89
TP89
P107/AN7/KI3 P05/AN05/D5
C7108 102K 90
TP90 P106/AN6/KI2 R5F364AKNFA
R7169 4.7k 91
P105/AN5/KI1
R7170 4.7k 92
P104/AN4/KI0
C7109 102K
R7181 220 93
P103/AN3
*R7150 10k
TP94 94
P102/AN2
*R7151 10k BAND 95
P101/AN1
96
AVSS
*R7164 10k MPP/MDD 97
P100/AN0
*R7165 10k 98
Vref
C7112
99
AVcc
104Z 100
P97/ADTRG/SIN4
R7143
1M
C7113
4.7u 50V Q7103
KRC104S
or RN1404
X7101
6MHz
C101
Q7102
R1EX24016ASAS0A
ROMSDO
SDA GND 4
5
ROMCLK
SCL A2 3
6
ROM_WP
WP A1 2
7
VCC A0 1
8
BACK_UP E2PROM
C7114 104Z
1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
P5504A NSCT-13P2193 P5503A NSCT-7P2187 P5502A
TO BCAF-1472 TO BCAF-1472 TO BCAF-1472
D E
DG/MICON SECTION
TO BCTRM-1473
P7000A NSCT-5P876
1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
Q7021
Q7022
KRA102S
KRC104S
or RN2402
or RN1404
R7139 2.2k
THERMAL
APOWER
SP_B
SP_A
50
TP49
49
48 HP_DET
47 AMUTE
P50/WRL/WR 46 R7136 100k
P44/CS0
P45/CS1 P51/WRH/BHE 45
TP45
P46/CS2 P52/RD 44 R7135 47
P47/CS3 P53/BCLK 43 R7134 47
P54/HLDA 42
TP42
P55/HOLD 41
TP41
P56/ALE 40
TP40
P57/RDY/CLKOUT 39
TP39
38
P60/CTS0/RTS0 TP38
P61/CLK0 37 R7131 47 DIR_RST
36
P62/RXD0/SCL0 TP36
DAC_LATCH
35 R7130 47
P63/TXD0/SDA0
FBUSY
34 R7129 47
P64/CTS1/RTS1/CTS0/CLKS1
P65/CLK1 33 R7128 47 FCLK
32 R7127 47 FRXD
P66/RXD1/SCL1
31 R7126 47 FTXD
P67/TXD1/SDA1
R7180
10k
R7121 10k
R7120 10k
POFF
VOLH2
-15V
+15V
LTAD
DAC_GND DAC_GND
RTAD
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
NSCT-20P2200 *P403B NSCT-23P2116
TO DIGITAL IN
F G
TO Display
P701B NSCT-33P2126
Q7064 Q7063
RL1N4003 RL1N4003
S-812C33AUA-C2N S-812C50AUA-C3E
L7001 R7002 D7010 D7011
+12V
O I O I
G NCH-1587-022M G 10
D7012 D7013
1W
RL1N4003 RL1N4003
Q7062
D7003
S-812C50AUA-C3E
EV+5.0V
DZ2J062M0L
O I
G
Q7061
S-812C33AUA-C2N
+3.3VMPU L7002
O I
NCH-1587-470K G
+12V
GND_DG
POFF2
4 3 2 1
TP7042
C7046
P5510A
100u
C7045 25V NTM-1P233(M1969)
+15VDC
TP7034 TP7033 TP7035
R7043
100u R7047 D7031 R7044
5.6k
C7043
25V
10u 50V 150k
1SS352 1k
TP7040 TP7041
R7041 D7030 R7042
47k 1SS352 100k
Q7031
KRC104S
R7051
or RN1404 -15VDC
R7052
TP7038 TP7037 D7034
1SS352
5.6k
C7044
R7053
10u 50V TP7036
150k
TP7039
TX-8020
H
FLAC1
FLAC2
SEC3_1
SEC3_2
SEC2-1
SEC2-2
D7001
1SS352
D7002 1SS352
F7001
5A-UL-125V
POFF
+12VD_STB
GND_DG
+10VSTB
POWERD
Q7040
KRC105S
or DTC123JKA
GND_DG
+5.0VDIS
THERMAL
RESET
CNVSS
FRXD
FCLK
+3.3VMPU
FBUSY
FTXD
GND_DG
APOWER
TP7051 TP7053
TP7052 TP7054
4 3 2 1
P5511A
NTM-1P233(M1969)
TITLE DRAWING No.
TX-8020
RC-202985
DG/MICON SECTION (Part-11)
DESIGN CHECK APPROV SHEET
H.Suda K.Ikeda S.Murayama
11 14
2013.04.09 2013.04.09 2013.04.09