Schematic Diagram - Onkyo TX-NR901 Service Manual

A

SCHEMATIC DIAGRAM 1

NAETC-7742
U2501
1
TORX178A
U6
NAETC-7741
2
U5
P2506B
TO NAVD-8069
(SCH. 10)
A B C
DD/DC WT/WR PA
R7276 - - -
R7277 - - -
R7289 0 10K 10K
R7290 - 33K 33K
3
R7291 - - -
R7292 10K 10K 10K
R7376 10K 10K 10K
R7377 10K 10K 10K
R7389 - 10K 33K
R7390 10K 56K 56K
R7391 10K 10K 10K
R7392 33K 33K 33K
R7389*
R7289*
R7390*
R7290*
R7391*
R7291*
R7392*
R7292*
4
R7393 2.7K
5
U7201
SPS-444-1- VP
C7207
NADIS-7738
100/6.3
B
DISPLAY AND SUB MICROPROCESSOR SECTIONS
L2576
NCH-1471
+5V
DGND
OPT
R2576
22
C Y
P2508
S
VIDEO5
IN
V
P2510
R2572
330
L
330
R
R2571
C2577
104Z
C2578
104Z
P2509
P3220B
R7382 1K
TO NAAF-7220
(SCH-3)
81 P07/D7
R7282
SYNC
82 P06/D6
10K
83 P05/D5
R7284
ISS
84 P04/D4
10K
85 P03/D3
R7286
FLRES
86 P02/D2
10K
87 P01/D1
10K
88 P00/D0
R7386
RDS
89 P107/AN7/~ KI3
90 P106/AN6/~ KI2
NTSC
91 P105/AN5/~ KI1
R7604
MODEL
92 P104/AN4/~ KI0
0
K3
93 P103/AN3
R7293 4.7K
K2
94 P102/AN2
R7294 4.7K
K1
95 P101/AN1
R7295 4.7K
96 AVSS
R7297 4.7K
K0
97 P100/AN0
C7206
98 VREF
104Z
99 AVCC
R7300 10K
100 P97/~ADTRG /SIN4
R7397 2.7K
R7395 2.7K
R7394 2.7K
C7297 102K
C7295 102K
C7294 102K
C7293 102K
C7208
GND 104Z
C
P7201A TO NAAR-8078
NAETC-7740
P7481
HEADPHONES
C7482 C7481
C7484
101J 101J
104Z
R7603
C7204
474Z
0
Q7202
RN2403
78:P12/D10 51:P43/A19
79:P11/D9 52:P42/A18
80:P10/D8 53:P41/A17
Q7201
M30626FHPFP
SUBMICROPROCESSOR
1:P96/ANEX1/SOUT4 24:P76/TA3OUT
2:P95/ANEX0/CLK4 25:P75/TA2 IN/~W
3:P94/DA1/TB4IN 26:P74/TA2 OUT/W
4:P93/DA0/TB3IN 27:P73/~CT S2/~RTS2/TA1IN/~V
5:P92/TB2IN/SOUT3 28:P72/CLK 2/TA1OUT/V
6:P91/TB1IN/SIN3 29:P71/RXD2/SCL/TA0IN/TB5IN
7:P90/TB0IN/CLK3 30:P70/TXD 2/SDA/TA0OUT
R7309 C7213 C7202
10K 102K
100/6.3
X7201
CST16.00MX W0C1
TX-NR901
(SCH. 9) TO NAPS-7708 (SCH. 7)
C7501
474Z
R7501
220
D7502
1SS352
U4
L7201
NCH-1471
C7201
100/6.3
D7201
1SS352
R7250 330
P44/~CS0 50
R7249 330
P45/~CS1 49
R7248 10K
P46/~CS2 48
R7247 10K
P47/~CS3 47
P50/~WRL/~WR 46
R7245 10K
P51/~WRH/~BHE 45
P52/~RD 44
R7243 10K
P53/BCLK 43
R7242 10K
P54/~HLDA42
P55/~HOLD41
R7240 10K
P56/ALE 40
R7239 10K
P57/~RDY/CLKOUT 39
R7238 220
P60/CTS0/RTS0 38
R7237 220
P61/CLK0 37
R7236 220
P62/RXD0 36
R7235 220
P63/TXD0 35
R7234 100
P64/~CTS1/~RTS1/~C 34
R7233 100
P65/CLK1 33
R7232 100
P66/RXD1 32
R7231 100
P67/TXD1 31
R7432
2.2K
R7431
220
C7203
474J
D
JL7201A
R7502 220
C7502 474
C7509 474
D7501 UD
C7510
33/50
+12V
LEDGRE
LEDRED
RZV1
RZV5
RZV4
RZV3
RZV2
VBJ
VAJ
SUBREQ
MAINSCK
MAINSO
SUBSO
NETRX
NETTX
P7203
FLASH