Schematic Diagram - Bias Board - Sony STR-DA4300ES Service Manual

6-47. SCHEMATIC DIAGRAM – BIAS Board –
1 2
BIAS BOARD
A
B
Q1904
2SC1815GR-TPE2
C
C1771
47
25V
D
Q1771
2SC4495
BIAS
R1774
47k
E
R1771
R1772
3.3k 1k
RV1751
220
BIAS ALIGNMENT
F
G
CN1705
14P
H
AD
PROTECTOR (SURR)
BOARD
CN1704
(Page 69)
I
STR-DA4300ES
3 4 5
D1909
D1908
1SS133T-72
1SS133T-72
R1929
10k
Q1906
2SA1038S-RSE-TP
R1912
10k
D1910
1SS133T-72
Q1904-1906
C1906
R1913
470 LEVEL DETECT
10k
6.3V
D1904
1SS133T-72
C1521
C1721 C1571
47 47
25V 25V
Q1721 Q1571 Q1521
2SC4495 2SC4495
2SC4495
BIAS BIAS BIAS
R1724
R1574
47k
47k
R1722 R1572
R1721 R1571 R1521
1k 3.3k 1k
3.3k 3.3k
RV1701 RV1551 RV1501
220 220 220
BIAS ALIGNMENT BIAS ALIGNMENT BIAS ALIGNMENT
AC
PROTECTOR (F-C)
BOARD
CN1501
(Page 67)
6 7
Q1905
2SC1841TP-PAFAEA
C1905
R1911
22
22k
50V
C1871
C1621
47
47
47
25V 25V
25V
Q1621
Q1871
2SC4495
2SC4495
BIAS BIAS
R1524 R1624
R1874
47k
47k 47k
R1872
R1522 R1621 R1871
R1622
1k
1k 3.3k 1k 3.3k
RV1601 RV1851
220 220
BIAS ALIGNMENT BIAS ALIGNMENT
AB
PROTECTOR (F-C)
BOARD
CN1503
(Page 67)
71 71
8 9 10
C1907
47p
R1923
1k
IC1901
NJM4565D
R1916
12k
VDD
C1821
47
IC1901
25V
LIMITTER
Q1821
2SC4495
BIAS
R1824
47k
R1821 R1822
1k
3.3k
RV1801
220
BIAS ALIGNMENT
Q1907
2SA1038S-RSE-TP
AE L
PROTECTOR (SB) A CLASS AMP BOARD
BOARD (1/2)
CN1801 CN1907
(Page 69) (Page 62)
STR-DA4300ES
11 12 13
R1919
R1918
47k 10k
VSS
R1917
470K
C1908
47p
D1905
1SS133T-72
R1914
22k
Q1908
DTC124ESA-TP
R1915
22k
Q1907, 1908
LIMITTER DETECT
P
A CLASS AMP BOARD
(2/2)
CN1908
(Page 63)