Read Harman Kardon SIGNATURE 1.5 (serv.man5) Service Manual online
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Two Channel Amplifier
Harman Kardon
SIGNATURE 1.5
H
G
F
F
G
H
E
D
C
B
A
A
B
C
D
E
J
I
L
M
K
O
O
P
P
L
M
I
J
K
1
ALL RESISTORS ARE 1/8W
UNLESS OTHERWISE SPECIFIED
SET BIAS ACROSS
SET BIAS ACROSS
P4-1, P4-2 TO 18 MV
BY ADJUSTING R69
1.
2.
NOTES
R95
1.3K
R98
1.3K
C35
102
R97
100
R94
100
C34
102
R75
1.0K
R77
1.0K
Q48
2SA1376
AGND2
C23
476
100V
R120
1K
C38
10V
477
CHANNEL 1
INPUT
J5
RCA/1S
T2
TS
GND2
R119
100K
C47
271
R118
33,2K
GND2
F4
8A
C14
104E
200V
+77VOC.CH2
Q57
A06
Q55
A06
D16
D1N4148
C33
10V
477
C25
10P
500V
MUTE
R102
47K
Q53
2SC2240
Q52
2SC2240
R99
120
R96
120
R53
33.2K
BAV20
D12
R59
1.5K
GND2
GND2
C19
181M
500V
Q49
2SA1376
R71
75
P2-1
Q10
2SC5242
Q11
2SC5242
Q18
2SC5242
Q26
2SC5242
Q27
2SC5242
Q19
2SC5242
R27
R1W
.33
R23
R1W
.33
R19
R1W
.33
1
2
4
3
BR2
F2
8A
C6
80V
828
C5
80V
828
C10
104E
200V
P1-2
P1-1
P1-3
R5
6.8K
2W
-77VDC.CH2
R73
1.0K
R76
1.0K
GND2
R72
1.0K
558
33
Q25
2SA1962
Q24
2SA1962
Q17
2SA1962
Q16
2SA1962
Q8
2SA1962
Q9
2SA1962
R22
R1W
.33
R26
R1W
.33
R18
R1W
.33
1
2
RES/IND.2UH
2UH
R107
RES-5W
1
W
s
3
1
R117
750
R103
180
GND2
D10
D1N4148
C37
476
100V
C8
828
80V
R3
6.8K
2W
C7
80V
828
GND2
P3-7 +12 VDC
J3
2
TS
T
3
S1
PHONE JACK
3.5MM
R106
10K
R104
100
P3-6
R105
10K
STAND BY
THERM SWITCH
GND
P3-2
P3-1
THERSW
TH124
DCSENSE
P3-5
P3-3
MUTE
R15
3.3K
+77V.CH2
FAULT
R85
10
C15
104
Q3
A56
R14
47K
47K
P3-4
FAULT
SENSE
D5
1N4004
-77VDC.CH2
GND2
C32
104
100V
R53
75
Q34
2SC3502
R74
1.0K
Q47
2SC
3478
BAV20
D11
R54
15K
R69
500
R57
1K
C17
100
R56
5.6K
Q43
A56
Q35
2SC
4793
1
2
3
Q40
2SA1376
1
2
3
1
2
3
R43
100
L3
2UH
Q33
2SA
1827
R38
R1W
.33
R34
R1W
.33
R30
R1W
.33
P2-2
2
3
1
2
1
3
R10
100
CH2_OUTPUT
Q36
2SA
1380
R58
15K
R81
10
Q41
2SC
3478
R44
100
R70
1.2K
R45
100
R39
R1W
.33
R55
R1W
.33
R31
R1W
.33
C11
106
R13
47K
R12
10K
10K
2
2
2
2
2
2
3
3
3
3
3
3
1
1
1
1
1
1
L4
2UH
2
3
1
Q37
2SC
4793
C24
104
100V
GND2
FAULT
Q2
2SC
3478
D2
D1N4148
D6
1N4004
+77VDC.CH2
RL2
CHANNEL 2
OUTPUT
R11
47K
47K
DCSENSE
GND2
R111
10
2W
W
R112
10
2W
W
C41
104E
100V
C46
271
CHGND
C45
271
BINDPOST
BLK
RED
J2
Signature 1.5 POWER AMPLIFIER
SCHEMATIC 1 of 2
Signature 1.5 POWER AMP SCHEMATIC (1 of 2)
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