Harman Kardon HK 990/230 Service Manual page 109

5
R71
3K
D
+16V +16V
+16V
R38 R39
4K3 1K8
Q22 1 Q36 1
2SA1312 2SC3324
Q23
1
2SA1312
Q31
1
2SC3324
R64
R40 330R
4K3
U1
C PC817A 2 x 2.2mA
1
MUTE#
INPUT
2
R42
1K
R41 R51
4K3 330R
1 Q28
2SA1312
Q35
1
2SC3324 Q27
2SA1312
Q34 Q29
1 1
2SC3324 2SA1312
R74 R75
4K3 1K8
B
-16V
-16V -16V
R46
3K
A
5
4
R69 R76
3K 150R 1/4W 1%
D20
DL4148
FB7
Q37 BDS-3S5
1
R70 2SC3324 D22
1K DL4148
1 Q33 1 Q38
2SC3324 MJD253 D18
DL4148
D21
DL4148 R72
39R
Q30 Q11
1 1
2SC3324 2SA1837
D17
DL4148
D15
R63 BAS20
330R
R73
12K 1/4W 1% C26
47nF(Mylar)10%
R14 R13 Mylar Cap
30K 3W 22K 3W
R48 C25
12K 1/4W 1% 270pF(NPO)5%
R50
330R
D14
D12 BAS20
DL4148 R47
39R
Q26 1 Q9 1
2SA1312 2SC4793
D10
DL4148
D13
DL4148
Q25
1 1
MJD243
R44 D11
1K DL4148
Q24
1
2SA1312 FB1
BDS-3S5
D9
R45 DL4148 R43
3K 150R 1/4W 1%
2SA1255 & 2SC3138: SOT-23
2SA1312 & 2SC3324: SOT-23
2SC4935 & 2SA1869: TO-220
2SC4793 & 2SA1837: TO-220
MJD243 & MJD253: DPACK
MJE15032 & MJE15033: TO-220
NJL3281D & NJL1302D: TO-264
MJL3281A & MJL1302A: TO-264
4
3
+ C18
220uF/100V
D25
BAS20
Q18
1
R66 2SC4793
180R
Q10
1
2SC4935
1 Q17
MJE15032
R65
270R
R53
R67 C29 R68
390R 10uF 82R
1
Q8
Q32 2SA1869
1
BCP56-16
R52 R49
300R 180R
C70
47nF(Mylar)10%
Mylar Cap
Q7
MJE15033
1
Q6
1
2SA1837
D7
BAS20
C27
3.9pF(NPO)5%
+ C2
220uF/100V
R55
10K 1/4W 1%
R56
-16V
270R
C21
C23 1uF R31
R54 47nF 1M
6K2
3
+
1
2
-
U3A
OPA2134UA R32
C22 1M
1uF
3
2
+80V
R23
C17 150R 3W
47nF/100V
C16
47nF/100V
Q13 Q12 Q14 Q15
MJL3281A MJL3281A NJL3281D MJL3281A
1 1 1 1
TP1 TP2 TP3 TP4
R18 R17 R19
0.33R 5W 0.33R 5W 0.33R 5W
C30 38mV
10uF
R6 R5 R7
0.33R 5W 0.33R 5W 0.33R 5W
TP5 TP6 TP7 TP8
1 1 1 1
Q2 Q1 Q3 Q4
MJL1302A MJL1302A NJL1302D MJL1302A
C1 C6
47nF/100V 47nF/100V
-80V
R2
150R 3W
C24 +16V
47nF
5
+
7
6
-
U3B
OPA2134UA
2
1
D
+60V
Q16
MJL3281A
1
SENSE+
R20 R21
0.33R 5W 0.33R 5W
C
OUTPUT
R8 R9
0.33R 5W 0.33R 5W
SENSE-
1
Q5
MJL1302A
B
-60V
A
1