Onkyo HTR-550 Service Manual page 10

A B
SCHEMATIC DIAGRAMS-1
AUDIO INPUT SECTION
To NADG-9177
(SD-3 : A3)
P304
1
P5505
P7900
R5500
330
RI
P7902
R5503
R
330 R5543 C5503
221K
220K
CD
R5544 C5504
R5504 220K 221K
L
330
R5505
R
2
330 R5545 C5505
220K NC
OUT
R5546
C5506
R5506 220K NC
L
330
TAPE
R5507
R
330 R5547 C5507
221J
220K
IN
R5548 C5508
220K
R5508 221J
L
330
3
P7904
R5513
R
R5553 C5513
330
221J
CBL/SAT IN 220K
R5554
C5514
R5514 220K 221J
L
330
R5515
R
R5555 C5515
330
220K NC
OUT
R5556 C5516
R5516
220K NC
L
330
VCR/DVR
R5517
3
R
R5557 C5517
330
220K 221J
1
IN
R5558 C5518
R5518 220K
221J
2
L
330
4 10
P5506
P7905
DVD (MULTI IN)
R5519
6
R
R5559 C5519
330
220K 221K
4
FRONT
R5560 C5520
R5520 220K 221K
5
L
330
R5521
3
R
R5561 C5521
330
220K 221J
1
SURROUND
R5562
C5522
R5522 220K 221J
2
L
330
P7906
7
R5523
6
SUBWOOFER
330 R5563 C5523
220K 221J
4
R5564 C5524
5
R5524 221K
5 220K
CENTER
330
R5525
3
R
330 R5565 C5525
220K 221J
SURROUND 1
R5566 C5526
BACK
R5526 220K 221J
2
L
330
7
C
To NADG-9177 To NADG-9177
(SD-3 : A2) (SD-3 : A2)
To NADG-9179
P303
(SD-9 : E1)
JL5502A
R5575
220K
R5576
220K
R5577
47K
R5578
47K
R5579
220K
64 1 C5551 47/25
63 2
62 3
61 4
60 5 C5552 47/25
INL8 64 : INL9 1-C : 1 2-C
59 6 C5553 47/25
INR8 1-OUT : 2 3-C
63 : INR9
58 7
INL7 3-OUT
62 : INLA/RECL1 AGND : 3
57 8
INR7 AGND
61 : INRA/RECR1 2-OUT : 4
56 9
INL6 4-OUT
C5554 47/25
55 10
INR6 4-C
C5555 47/25
54 11
INL5 5-C
53 Q5501 12
INR5 5-OUT
52 13
R2S15211FP
INL4 AGND
51 14
INR4 6-OUT
SELECTOR / VOLUME
50 15 C5556 47/25
INL3 6-C
49 16 C5557 47/25
INR3 FLC
(Botom view)
48 17
INL2 FLOUT
47 18
INR2 AGND
46 19
INL1 BASS_L1 : 21 FROUT
C5558 47/25
45 20
BASS_L2 : 22
INR1 FRC
474J
44 21 C5559
TRE_L : 23
AVEE
42 : DATA
43 22 C5560 823J
AVCC : 24
CLOCK 43 : DGND
42 23 C5561 223J
41 24
+6.8V
+/-7V Supply
-6.8V
-12V
R5589 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
Q5503B 5
DMIXL 7
R5599
6
Downmix
10K
+12V
D E
<Note>
NC = No mount of parts.
SD-Z : XY
Location of connected terminal in schematic diagrams.
P302
SD-Z = Schematic diagrams-Z. X = A to H, Y = 1 to 5.
R5680
R5681
R5682
-12V
Q5630A
R5630
47/50 220
3 NJM4580 C5600
100/25
1 SW_OUT
C5630
2
R5634
10K
R5632
15K
C5632 103J
5
C5601
Q5630B 7
47/50
SBR_OUT
NJM4580 6
SBL_OUT
Subwoofer
C5602
+12V
47/50
SBR_OUT
SBL_OUT
C_OUT
C5603
47/50
SR_OUT
SW_OUT1
SL_OUT
C5604
47/50
SR_OUT
SL_OUT
C5605
R_OUT
47/50
R_OUT
47/50
L_OUT L_OUT
C5606
R5585
1.8K
+/-12V Supply
C5607
Q5670
47/50
78M12 C_OUT
R5674
3 1
O I
47/50
82 Z2_R
C5608
R5675 47/50
3 2 Z2_L
O I
82 R5667 C5609
-12V
Q5671
79M12
22
DAC_FR
DAC_FL
R5666
+12V
22
R5672
47 2W
+22V
R5670
47 2W
J5063
R5673
68 2W
-22V
D9001 - 9004 : RL1N4003
R5671
68 2W
F G
FRONT Lch
FRONT Rch
NAAF-8779(1/2)
NC
U01 AMPLIFIER PC BOARD
P301
NC
220K
220K
220K
Q6226
2SB1068-U
R6227
3
C6227
3.3
104Z
270 100
D6221 D6222
R5610 R5620
RN1441 +12VTRG
GND_TRG
RN1441 Q5600 Q5610
Q5601 Q5611
RN1441 NC
1
Q6227
RN1402
R5611 R5621
0
2.2K
R5612 R5622
2.2K 0
Q5602
RN1441 Q5612 NC
RN1441 Q5613 NC
Q5603
R5613 PREOUT RELAY
2.2K R5623
0
C5700
R5614
103Z
2.2K R5624
0
R5668
Q5604
22
RN1441 Q5614 NC
RN1441 Q5615 NC
8 9
Q5605
10
R5615
5 4
2.2K R5625
3
0
R5616
12 1
2.2K R5626
0
RL5700
Q5606
RN1441 Q5616 NC
RN1441 Q5617 NC
Q5607
R5617
2.2K 0
R5627
2.2K
R5618
Q5608
RN1441
RN1441
Q5609
2.2K
R5619
NC
GND_S1
+22V
R5660
2.2 1W
S1L+
D9002 D9001
To NAAF-8779(2/2)
(SD-2 : B5)
GND
D9004 D9003
R5661
2.2 1W
S1L-
To NAVD-9178(2/2)
(SD-6 : E2)
HT-R550
H
To NAAF-8779(2/2)
VOLH
SEC1H
(SD-2 : A3)
PROTECT
NC
2
P6221
22
24
21
R6221
2
C6221
100 10
223K 1
1
1
Q6223 Q6222
RN1402 RN1402
GND_E
P6991
NC
D5700
1SS133
C5707
PREOUT
R5531
SUBWOOFER
100
C5708
223K
SBR
SBL
SR
To NAAF-8779(2/2)
SL
(SD-2 : D4)
R
L
C
P6002
4
3 FRONT
2
SPEAKERS B
1
R L