Power Amp-R And Power Amp-C Assys - Pioneer VSX-56TXi Service Manual

1

3.20 POWER AMP-R and POWER AMP-C ASSYS

A
X
POWER AMP-R ASSY (AWX7985)
CN4402
XKP3080
+VH
+VH 19
+VH 18
VHG 17
B
VHG
16
VHG
15
-VH
-VH 14 -VH
NC 13
AMUTE
12
OL DET 11
DC DET
10
AGC
9
(C)
C
8
AGFR
7
FR
6
AGSR
5
SR
4
AGSBR
3
SBR
2
NC
1
C
KN4403
VNF1084
GND_C
CHASSIS
Q4404
2SC2412K
Q4403
2SC2412K
D
AMPG
CN4455
KP250NA10
AMPG 1
AMPG
+VH 2
VHG 3
-VH 4
(C)
CG1 5
CS
6
E
CS 7
CS
8
DC
9
CG2
10
R4451
R4452
10k
F
X Y
64
1
2
R4151 C4151
10/50
1k
CEHAT
Q4151
R4152
10k
2SC3326(AB)
VHG AMPG
OL
AGC
C
R4251 C4251
1k 10/50
CEHAT
Q4251
R4252
10k
2SC3326(AB)
VHG AMPG
DC
R4351 C4351
1k 10/50
CEHAT
Q4351
R4352
10k
2SC3326(AB)
+VH
AMPG
VHG
VHG
Y
POWER AMP-C ASSY (AWX7986)
-VH
(C)
(C)
C4451 R4453
1k 10/50 1k
CEHAT
Q4451
2SC3326(AB)
VHG AMPG
(C)
2
3
FR
R4153
1k
R4155
1.2K
IC4101,4301
IC4401,4601
1.+IN
2.-IN
3.EFOUT+
SR
4.EFOUT-
5.+OUT
6.-OUT
7.+VCC
8.-VCC
9.NC
10.TRIM
R4253
1k
R4255
1.2K
SBR
R4353
1k
R4355
1.2K
(C)
+VH
R4456
C
100
(C)
7
1
IC4451
PA9009A
R4455
2
1.2K
8
-VH
(C)
VSX-56TXi
3
4
+VH
7
1 10
3
5
IC4151
PA9009A
6
2 4
8
C4162
6p
CH
-VH
R4162
+VH
RN1/10SE
7
1 10
3
5
IC4251
PA9009A
6
2 4
8
C4262
6p
-VH
CH
R4262
+VH
RN1/10SE
7
1 10
3
5
IC4351
PA9009A
6
2 4
8
C4362
6p
CH
-VH
R4362
RN1/10SE
(C)
(C)
(C)
R4460
56
10
3
5
6
4
R4461
(C)
56
C4462 C4463
6p 6p
CH CH
R4462
33k
RN1/10SE
4
R4160
56
R4161
56
C4163
6p
CH
33k
R4260
56
R4261
56
C4263
6p
CH
33k
R4360
56
R4361
56
C4363
6p
CH
33k
(C)
(C)
Q4452
2SA1255
(C)