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TX-SR55
SCHEMATIC DIAGRAM 1
DAC_FR
DAC_FL
DAC_SBR
DAC_SBL
+12VA
-12VA
GND
SBR_VO
CT_VO
SL_VO
SR_VO
SBL_VO
+5VDSP
APOWER
SPRLF
SPRLCS
SPRLSB
Z2LPMUTD
SBZ2MUTD
FANH
VPOWER
SYSIN
THERMAL
FANCTR
SPRLZ2
AMUTD
PROTECT
SYSIN
+56S
TRG12V
+13S
SEC1H
FL_PO
FR_PO
SBL_PO
SBR_PO
CT_PO
SL_PO
SR_PO
TRG12V
GND
+24V
-24V
+56S
DAC_CT
DAC_SL
DAC_SW
DAC_SR
MCT
MSL
MSR
MSW
Z2BDMUT
Z2BDDAT
Z2BDCLK
VPOWER
AMUTD
SBZ2MUTD
Z2LPMUTD
THERMAL
SPRLCS
PROTECT
SPRLF
VOLH
SPRLSB
SPRLZ2
SEC1H
APOWER
VOLH
DSPBUSY
VIDEO+5V
VIDEO-5V
+12VA
-12VA
FL_VO
FR_VO
DSP Section
PURE AUDIO
SCH. 2
ZONE2
LINE/PREOUT
SCH. 2 DSP Section
RI
TO NAAF-8383 (SCH. 3)
TO NAPS-8389 (SCH. 6)
TO NAPS-8389 (SCH. 6)
R403
270
R411
100
R404
270
R409
100
R402
270
R410
100
D902
1SS352
C908
104Z
R401
270
C906
104Z
D901
1SS352
C352
104Z
C389
221J
R385
47K
R386
1.2K
R387
15K
C388
10/16
+
R425
0
R412
100
R435
0
R436
0
R451
4.7k
R452
4.7k
2
Q910
79M05FA
3
O
2
I
1
G
R902
56
Q902
79M12HF
3
O
2
I
1
G
R908
47K
R903
0
Q901
78M12HF
3
O
2
G
1
I
Q402
RN1441
Q404
RN1441
Q406
RN1441
Q407
RN1441
Q408
RN1441
R480
0
R479
0
C911
10/16
+
C912
10/16
+
C907
10/16
+
C909
10/16
+
C904
10/16
+
C905
10/16
+
R907
47K
Q908
RN2402
Q907
RN1402
C443
102J
C444
102J
C450
104Z
R350
330
R349
330
R498
100k
R428
100k
R427
100k
R407
270
R415
100
R408
270
R416
100
Q413
RN1441
Q414
RN1441
Q415
RN1441
Q416
RN1441
R405
270
R406
270
R414
100
R413
100
Q409
RN1441
Q410
RN1441
Q411
RN1441
Q412
RN1441
R426
0
Q421
BD3814
1
2
3
4
5
6
7
21
TNFR
22
TNFL
23
BNF1R
24
BNF2R
25
BNF1L
26
BNF2L
27
OUTFL
28
OUTFR
29
OUTC
30
OUTSL
31
OUTSR
32
OUTSW
33
AGND8
34
DGND
35
MUTE
36
DA
37
CL
38
AGND9
39
VCC
40
AGND10
+
+
TREBLE
BASS
LOGIC
E301
1
E302
1
E300
1
2
3
4
P422
4
2
1
3
R909
1K
R910
18K
R905
0
P6931B
11
10
9
8
7
6
5
4
3
2
1
R499
330
P424
JL9502B
1
2
3
4
5
6
7
C417
104J
C420
104J
C418
104J
C416
472J
C415
472J
P353A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
3
C351
104Z
P354A
14
13
12
11
10
9
8
7
6
5
4
3
2
1
R388
10K
Q307:A
NJM4565M-D
6
5
4
7
8
C402
47/16
+
C403
47/16
+
C404
47/16
+
C405
47/16
+
C407
47/16
+
C406
47/16
+
C408
100/16
+
C401
47/16
+
Q401
RN1441
R417
22k
Q403
RN1441
R418
22k
Q405
RN1441
R419
22k
R420
22k
R421
22k
R422 22k
R423
22k
R424
22k
C439
4.7/50
+
C440
4.7/50
+
Q429
RN1441
R489
2.2K
R490
2.2K
R487
22K
R488
22K
R485
2.2K
R486
2.2K
Q427
RN1441
R460
0
R459
0
R461 0
R462 0
C419
104J
P308
1
2
3
4
5
6
7
8
9
10
11
12
Q901B
hs
Val
1
C902
22/35
+
C901
223Z
Q905
Q906
R901
12
R906
100 2W
C390
103J
Q903
78L05HF
1
O
2
G
3
I
Q911
78L05HF
1
O
2
G
3
I
Q904
2SA1726
R904
33
R913
33
Q909
2SA1726
C391
103J
A
1
2
3
4
5
B
C
D