Schematic Diagram - Bias Board - Sony STR-DA4400ES Service Manual

6-53. SCHEMATIC DIAGRAM - BIAS Board -

1 2
BIAS BOARD
A
B
Q1904
2SC1815GR-TPE2
3.3
C
0
C1771
47
25V
D
Q1771
2SC4495
BIAS
1.1
-1
-0.5
R1774
47k
E
R1771
R1772
3.3k 1k
RV1751
220
BIAS ALIGNMENT
F
G
H
AD
PROTECTOR (SURR)
BOARD
CN1704
(Page 77)
I
STR-DA4400ES
3 4 5
D1909
D1908
1SS133T-72
1SS133T-72
R1929
10k 3.1
Q1906
2SA1038S-RSE-TP
R1912
10k
-59.5
D1910
1SS133T-72
0
C1906 Q1904-1906
R1913
470
LEVEL DETECT
10k
6.3V
D1904
1SS133T-72
C1571
C1721
47 47
25V 25V
Q1721 Q1571 Q1521
2SC4495
2SC4495 2SC4495
BIAS BIAS BIAS
1.1 1.1 1.1
-1 -1
-0.5
-0.5 -0.5
R1724
R1574
47k
47k
R1572
R1721 R1722 R1571 R1521
1k 1k
3.3k 3.3k 3.3k
RV1701 RV1551 RV1501
220 220
BIAS ALIGNMENT BIAS ALIGNMENT BIAS ALIGNMENT
AC
PROTECTOR (F-C)
BOARD
CN1501
(Page 75)
6 7
Q1905
2SC1841TP-PAFAEA
-60
-59.9
C1905
R1911
22
22k
50V
C1621 C1871
C1521 47
47
47 25V
25V
25V
Q1621 Q1871
2SC4495
2SC4495
BIAS BIAS
1.1 1.1
-1 -1 -1
-0.5
-0.5
R1624
R1524 R1874
47k
47k 47k
R1522 R1871 R1872
R1621 R1622
1k 1k
3.3k 1k 3.3k
RV1601 RV1851
220 220 220
BIAS ALIGNMENT BIAS ALIGNMENT
AB
PROTECTOR (F-C)
BOARD
CN1503
(Page 75)
79 79
8 9 10
C1907
47p
R1923
1k
IC1901
NJM4565D
2.1
-13.5
R1916
15
12k
VDD
C1821
47 IC1901
25V
LIMITTER
Q1821
2SC4495
BIAS
1.1
-1
-0.5
R1824
47k
R1821 R1822
1k
3.3k
RV1801
220
15
BIAS ALIGNMENT
14.3
Q1907
14.9
2SA1038S-RSE-TP
AE L
PROTECTOR (SB) A-CLASS AMP BOARD
BOARD (1/2)
CN1801 CN1907
(Page 77) (Page 70)
STR-DA4400ES
11 12 13
R1918 R1919
47k 10k
-14.9
VSS
-9.3
-13.5
R1917
14.2
470K
C1908
47p
D1905
1SS133T-72
13.7
R1914
22k
0
Q1908
DTC124ESA-TP
R1915
22k
Q1907, 1908
LIMITTER DETECT
P
A-CLASS AMP BOARD
(2/2)
CN1908
(Page 71)