Onkyo TX-8050S Service Manual page 12

A B
SCHMATIC DIAGRAM - 7 (SD - 7)
PREOUT / ZONE-2 / RS-232C SECTION
BAAR-0716
1
1 PREOUT_R
2 GND_PO
3 PREOUT_L
4 GND_PO
2 5 Z2OUT_R
6 GND_Z2
7 Z2OUT_L
8 +15V
9 -15V
10 +BRG
11 GND
3
30
29
28
27
26
R4840
25
470 C4814 333J 24
C4815 333J 23
C4816 224J
22
R4842
470
21
C4817 473J
R4845
4.7K
4
R4889 R4863
820 820
R4868 68(1W)
+14.97V +11.80V
R4877 68(1W)
-15.09V
-11.89V
5
C
R-IN
L-IN
R-IN
L-IN
R4817 220K R4818 220K
1
INR3 AGND
2
INL2 LIN
3
INR2 RIN
4
INL1 CIN
Q4810 5
INR1 SWIN
470K
6 R4838
AGND SLIN
M61540FP
7 R4841 470K
TREL SRIN
8
TRER AGND
9 R4844 470K
BASL1 SROUT
10 R4846 470K
BASL2 SLOUT
C4820
47/25
Z2_R-OUT
Z2_L-OUT
C4822
47/25
+3.7V
R4869 100(1W)
+7.14V
R4878 100(1W)
-7.16V
P4808A CONNECTOR OPTION
Ref NO. CNT MODEL NAME
7P TX-8030/50
P4808A
15P NC
P4808A
*
7P
D E
NO USE
R4800
L4800 10K
BLM21PG221SN1
R4802
R4803 10K
330
R4805
330
+3.3VMPU
R4807
0
N.M
D4800
1 2
47
R4811
47
R4812 Q4801
KTA1266
D4804
2 1 2 1
D4803
8.2
R4813
KDS4148U
KDS4148U 8.2
R4814
D4805 D4806
2 1 2 1
KDS4148U KDS4148U
Q4804
KRC102S
1
1
Q4805
KRC102S
Q4807
KTA1266
R4843
10K
Q4811
R4847 R4848
2.2K RN1441 100
Q4813
R4857 R4858
RN1441
2.2K 100
PREOUT_R
GND_PO
PREOUT_L
AMUT
C4829
R4866
22(1/4W)
R4890 R4870
47K 2
22(1/4W)
R4891
R4865
3
R4871
220K
47K
Z2MUT
C4838
R4879
+15V R4881
47K
2
-15V
R4882
3
R4883
220K
47K
GND_Z2
NSCT-15P2108
FROM BADG-0715
FROM SD-6 G-1 (DG PWB)
15P
F G
RS-232C
C4800
223K
16 1 R4801
FORCEOFF EN
C4801 10K
15 2
VCC C1+
C4802
14 3 1/50
GND V+
P4800
13 4 1/50
T1OUT C1-
C4805
12 5
FORCEON C2+
11 6 1/50
T1IN C2-
C4806
10 7
INVALID V-
R4804
9 8 1/50
330
R1OUT R1IN
R4806
330
R4808
100
3
2
CHGND
1
R4809
1K
U4800
1 2
D4801
P4801
SIR-34ST3F
IR_CAP P4802
R4810
100(1W)
1 2 5
SIR-34ST3F 6
D4802
4
2
3
1
P4803
Q4802 5
2SB1240 6
4
47
R4820
47 R4823
2
3
D4807 D4808 1
2 1 2 1
KDS4148U KDS4148U
R4829 P4804
100(1W)
5
6
1
* R4830 4
Q4806
NC
KRC102S
R4833 R4834
2
R4835 0 0 3
R4836 1
220(1W) *
NC
R4837
1K
P4805
3
Q4812
R4849
RN1441 100
1
R4853
100
2
Q4814 C4821 4
RN1441
102K
R4859
100
C4826 3
1
R4864
100
2
C4827
4
101J C4830 101J
22K R4867 22K
C4831
102K
6
R4872 C4834 R4874 R4875
R4873
1 7 3
5 Q4817
22K 4.7/50 270 100 100
1
NJM4580M-D
NJM4580M-D
5
Q4815:A
Q4815:B
Q4816
RN1441
RN1441
2
NC
4
101J C4839 101J
22K R4880 22K
R4887
6 R4885
R4886
R4884 270 100
1 7 100
5
22K
C4840
NJM4580M-D
4.7/50
Q4818:A
Q4818:B C4844
Q4819 Q4820
NJM4580M-D
RN1441 RN1441 102J
TX8030 /TX8050
H
10
1
6
2
7
RS-232
3
8
4
9
5
11
RS-232
UPPER
IR IN A
12V TRG C
LOWER
UPPER
12V TRG A
12V TRG B
LOWER
IR IN B
*IR-OPTION*
PARTS MODEL
R4830,R4836 NC
IR OUT
R
ZONE2 OUT
L
P4806
R
PREOUT
L
P4807
PRE-SW
ZONE2-SW