Sony BM-21 Service Manual page 41

4-5. SCHEMATIC DIAGRAM – AUDIO BOARD (3/4) –
S401
CN101
12P
( (
SUPPLEMENT-2
Page 17
TP18
HRP901 -2
TP19
TP20
BM-21/23
• See page 18 for IC Block Diagram.
S502
R167
220
Q163
2SD1819A-R-TX
R166
2.2k
Q161
2SD1819A-R-TX
TP8
C163
1
TP9
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP73
TP17
L501
D506
MA729-TX
D504
MA111-TX
IC504
XC6371A300PR
Q517
UN5114-TX
C526
R548
22
33k
6.3V
Q518
XN1215-TX
C525
JR203
22
0
6.3V
R549
11k
R523 100
C508 10 4V
R553
680
R164
2.7k
R163
270k
C162 C161 R162
0.1 0.1 10k
C165
3300p
Q162
2SD1819A-R-TX
C164
R170
R165
D161 1000p
1M
270
MA111-TX
D503 MA111-TX
D505 MA111-TX
R524
R562 R528
R561
15k
15k
33k 33k
R527
R526
R546
330k
330k
1k
C509 C510
0.022 0.022
R547
10k
Q504
2SD1819A-R-TX
Q523
2SD1819A-R-TX
Q505
C519
C528
2SD1819A-R-TX 0.1
0.1
R529
68k
R552
Q519
1.2k
2SD1819A-R-TX
UN5214-TX
15 15
( (
SUPPLEMENT-2
Page 13
JR205
R156
R153
R154 0
100
10k
47
R157 R544
22k 10k
Q516
XP1501-TXE
R155
680
C504
0.1
R508
R531
7.5k
R539
1k
100k
TP25
S503
Q512
2SD1819A-R-TX
R510 R509
10k
100k
TP26
R511
75k
R550
100k
C512
33
C507
4V
C523
0.1
0.1
Q506
BM-21/23
( (
SUPPLEMENT-2
Page 14
( (
SUPPLEMENT-2
Page 16