Harman Kardon HK 990/230 Service Manual page 108

5
JP5
Faston 6.3
2
2
230V
1
1
15V JP8
D
Faston 6.3 2
2
1
1
45V
JP4 2
2
Faston 6.3
1
1
2
2
JP6
1
1
Faston 6.3
0V
45V
2
2
1
1
JP2
15V Faston 6.3
2
2
1
1
JP3
Faston 6.3
C
J1 R57
7P * 2mm 22K
R58
1 1K
2
3
4
5
6
7
MUTE#
R10
5R6 1W
B
C36
100nF
EGND
A
5
4
60VAC diodes mounted on heatsink
D5 D4
MUR2020 MUR2020
45VAC
C15 C14 C13 + C12
+
10nF/250V 10nF/250V 6800uF/80V 6800uF/80V
C5
C8 10nF/250V C4 + C3
+
10nF/250V 6800uF/80V 6800uF/80V
45VAC D2 D1
MUR2020 MUR2020
60VAC
C28
330pF
INPUT
Q43
FAULT# 2SA1255
+60V
RL3C
HF-115F-048-1ZS3B R91
D27 33K
1
+
BAS20
10
U2
R24 PC817A
2K2 1W
R90 Q44
1K 2SC3138
1
R95
22K
+60V
RL4C
HF-115F-048-1ZS3B
D8
1
+
BAS20 10
Q40
1
R1 2SC3138
2K2 1W
R28 Q21
1K 2SC3138
1
R29
22K
4
3
+80V
R26
+60V 0.22R(RF) 2W
C11
+
R16
10K 3W 1000uF/100V
2 3
D3
GBU8D
R4
10K 3W
+ C7
1000uF/100V
-60V
R27
0.22R(RF) 2W
-80V
+60V
C35 R94
47nF 10K
1
R92 R93
OUTPUT
33K 33K
Q42 R81
2SC3138 390R
1
SENSE+
1
D24
DL4148
2
C33 R22 6K2 1/2W
2.2uF
D23
DL4148
+16V
SENSE-
R80
Q41 R83 390R
2SC3138 4K3
1
R77
R79 68K
10K R59
D16 22K
DL4148
R78 D19
10K DL4148
3
+
6
2
-
U4
C37 C31 TL061CD
47uF 47uF
-16V
3
2
R96 Q39 +16V
2K4 2W MJD243
4 3
+/- 16VDC rails current:
1. 0.2mA for TL061
R89
2. 4mA for OPA2134
10K
3. 4mA for input stage
R15 C32 R82
22K 3W 1uF 10K
C34
1uF
D26
C19 D6
1uF
R3 C20 R30
22K 3W 10K
1uF
R25
10K
R97
2K4 2W
4 3
Q20
MJD253 -16V
L1
2.2uH
HF-115F-048-1ZS3B
R12 RL3A
1R 5W
2
3
SPEAKER A
4
R11
9
5R 5W
8
7
RL3B
HF-115F-048-1ZS3B
C10 C9 RL4A
47nF/100V 47nF/100V HF-115F-048-1ZS3B
2
3
SPEAKER B
4
9
8
7
RL4B
HF-115F-048-1ZS3B
R62 R60
10K 10K
R61 RT1
10K CWF51-104J-3951(100K)
100K
t
2
1
D
C
2
2
JP7
1
1
2
2
JP1
1
1
2
2
1 JP9
1
2
2
JP10
1
1
B
A
1