Onkyo HTR-550 Service Manual page 8

A
SCHEMATIC DIAGRAMS-1
AUDIO INPUT SECTION
1
P5505
P7900
RI
P7902
R
CD
L
R
2
OUT
L
TAPE
R
IN
L
3
P7904
R
CBL/SAT IN
L
R
OUT
L
VCR/DVR
R
1
IN
L
4
P7905
DVD (MULTI IN)
R
4
FRONT
L
R
1
SURROUND
L
P7906
SUBWOOFER
4
5
CENTER
R
SURROUND 1
BACK
L
B
To NADG-9177
(SD-3 : A3)
P304
R5500
330
R5503
R5543 C5503
330
221K
220K
R5544
C5504
R5504 220K 221K
330
R5505
R5545
330 C5505
220K NC
R5546
C5506
R5506
220K NC
330
R5507
C5507
330 R5547
221J
220K
R5548
C5508
220K 221J
R5508
330
R5513
C5513
R5553
330
221J
220K
R5554
C5514
220K 221J
R5514
330
R5515
R5555 C5515
330
220K NC
R5556 C5516
R5516
220K NC
330
R5517
3
C5517
330 R5557
220K 221J
R5558
C5518
R5518 220K 221J
2
330
10
P5506
R5519
6
R5559 C5519
330
220K 221K
R5560 C5520
R5520 220K 221K
5
330
R5521
3
R5561 C5521
330
220K 221J
R5562
C5522
R5522 220K
221J
2
330
7
R5523
6
R5563 C5523
330
221J
220K
R5564 C5524
R5524 221K
220K
5
330
R5525
3
R5565 C5525
330
220K 221J
R5566 C5526
220K
R5526 221J
2
330
7
C
To NADG-9177
(SD-3 : A2)
To NADG-9179
(SD-9 : E1)
JL5502A
R5575
220K
R5576
220K
R5577
47K
R5578
47K
R5579
220K
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
R5589
HT-R550
To NADG-9177
(SD-3 : A2)
P303
C5551 47/25
1
2
3
4
C5552 47/25
5
INL8 2-C
64 : INL9 1-C : 1
C5553 47/25
6
INR8 3-C
63 : INR9 1-OUT : 2
7
INL7 3-OUT
62 : INLA/RECL1 AGND : 3
8
INR7 AGND
61 : INRA/RECR1 2-OUT : 4
9
INL6 4-OUT
C5554 47/25
10
INR6 4-C
C5555 47/25
11
INL5 5-C
Q5501 12
INR5 5-OUT
13
R2S15211FP
INL4 AGND
14
INR4 6-OUT
SELECTOR / VOLUME
15 C5556 47/25
INL3 6-C
C5557 47/25
16
INR3 FLC
(Botom view)
17
INL2 FLOUT
18
INR2 AGND
19
BASS_L1 : 21
INL1 FROUT
C5558 47/25
20
BASS_L2 : 22
INR1 FRC
21 474J
C5559
TRE_L : 23
AVEE
42 : DATA
22 C5560 823J
AVCC : 24
CLOCK
43 : DGND
C5561 223J
23
24
+6.8V
+/-7V Supply
-6.8V
-12V
NJM4580
1K
Q5503A 3
DMIXR
1
R5591
2
10K
R5590 10K
R5592 R5593
C5590 330J
470 1.2K
R5594 10K
R5595 10K
C5591 330J
R5596 R5597
R5598 10K
470 1.2K
NJM4580
5
Q5503B
DMIXL 7
R5599
6
Downmix
10K
+12V
D
P302
SBR_OUT
SBL_OUT
C_OUT
SW_OUT1
SR_OUT
SL_OUT
R_OUT
L_OUT
R5585
1.8K
R5674
82
R5675
82
DAC_FR
DAC_FL