Read Harman Kardon HK 3770 (serv.man8) Service Manual online
7
6
5
4
3
2
1
REVISION
SCHEMATIC DIAGRAM
SHEET
MODEL
DRAWING NO
DESIGN
CHECK
APPROVE
A
D
C
6
A
B
C
D
5
4
3
2
1
B
6 6
DAC-R
DAC-L
FROM CODEC
DAC-L
DAC-R
MUTE CONTROL
TO AMP B'D
2013.11.27
MULTI. LAB
ANAM
ISSUE
MP
2012.03.01
27
14
(VOLUME_FILTER)
OVERLOAD
P_FAIL
P_FAIL
-12V
AD_RIN
OC_DETECT
TUNER_SDA
TUNER_SCL
FUNC_MUTE
TUNER_MUTE
TUNER_MUTE
* 3 Step Detect *
3.8A : VCC 45V->41V
4.3A : VCC 41V->25V
3.8A : VCC 45V->41V
4.3A : VCC 41V->25V
5.96A: Protect
DC_PROTECT
HP_L
HP_R
AGND
AD_LIN
+7VA
-7VA
+3.3VC
FAN1_ON
Bluetooth
BT_STATUS
AGND
+3.3V_BT
FN2
AGND
BT_PWR_CTL
BT_AUDIO_EN
BT_FL
BT_FR
FN1
BT_STATUS_PAIR
FN3
AGND
CHGND
CHGND
CHGND
+5V_BT
+12V
HK3700 /3770
AGND
HK3770 ONLY
SPK2_CONT.
SPK1_CONT.
REC_MUTE
SPK1_CONT.
REC_MUTE
OVERLOAD DETECTION
PROTECT TEST
(SHORT)
(SHORT)
DC PROTECTOR
Operating: +5.0V~ , -5.0V~
R940=1.5K
C
H
A
NGED
P
IN 2
5 -
>
P
IN 2
7
2013.
06.
20
C
H
A
NGED
P
IN1
4 D
GND
-
>
F
A
N1
_O
N
OU
TA
IN1
A
V+
IN2
A
CNT
1
IN3
A
CN
T2
NC
IN3
B
Vr
ef
IN2
B
GND
IN1
B
OU
TB
AGND
MAIN_VOL_CLK
MAIN_VOL_DATA
NJW1112_LATCH
NJW1194_LATCH
AUDIO_R
AUDIO_L
AGND
O
N
LY
H
K
3700
O
N
LY
H
K
3700
AGND
2013.08.07
2013.08.07
DAC_FR
DAC_FL
2013.08.08
2013.08.08
2013.08.08
2013.08.08
AGND
FAN2_ON
2013.11.27 2013.11.27 2013.11.27
C.D.W
S.K.S
K.J.K
2013.08.29
HK3770 ONLY
V+
B OU
T
PU
T
B-
IN
PU
T
B+
IN
PU
T
V-
A+
IN
PU
T
A-
IN
PU
T
A O
U
T
PUT
-
+
B
-+
A
8
7
6
5
4
3
2
1
IC
1500
(H
K3770)
CV
IA
Z4580MT
R
-E
1
R1514
3.3K(HK3770)
R1512
3.3K(HK3770)
C1506
2700P
(H
K3770)
C1504
2700P
(H
K3770)
R1515
1.5K(HK3770)
R1513
1.5K(HK3770)
R
1508
6.8K(H
K3770)
R1516
6.8K(HK3770)
C1508
390P(HK3770)
C1505
390P
(H
K3770)
C1507
0.1u
F(
H
K3770)
C1510
0.1u
F(
H
K3770)
R1511
100(HK3770)
C1513
10/16V(HK3770)
R
1510
100K(H
K3770)
C1512
0.01u
F(
H
K3770)
R
1507
6.8K(H
K3770)
C1501
2700P
(H
K3770)
C1503
2700P
(H
K3770)
R1502
1.5K(HK3770)
C1502
390P
(H
K3770)
R1505
1.5K(HK3770)
R1503
6.8K(HK3770)
C1500
390P(HK3770)
R1506
100(HK3770) C1509
10/16V(HK3770)
R
1509
100K(H
K3770)
C1511
0.01u
F(
H
K3770)
R1501
3.3K(HK3770)
R1500
3.3K(HK3770)
R1517
0(HK3770)
R1504
0(HK3770)
Q1505
T1N144C
Q1504
T1N144C
Q1503
T1P
144C
R
1557
10K
Q1501
T1N144C
Q1502
T1N144C
Q1500
T1P
144C
R
1555
10K
R1556
1M
R1558
1M
D1501
1SS355
C1543
470/16V
C1542
470/16V
D1500
1SS355
R1554
1K
R
1570
0
D1503
HVD1SR159-200
D1502
HVD1SR159-200
3
2
1
IN
GND
OUT
IC1502
CVILM7808RTRL
3
1
2
OUT
IN
GND
IC1503
CVILM7908RTRL
C1545
0.1u
F
C1547
0.1u
F
C1544
0.1u
F
C1546
0.1u
F
Q1509
R1561
100K
R1568
10K
R
1569
10K
D
1506
3.3V
Q1517
MMBT5551
Q1516
MMBT5551
Q1515
MMBT5401
R
1571
100K
D1504
1SS355
D
1505
1S
S355
C1552
10/16V
C1553
1000P
L1500
CLZ9R005V
C1554
22/6.3V
C1555
0.1u
F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
W
F1500
CJ
P17GA
193Z
Y
(H
K3770)
20
21
23
22
19
18
16
17
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
W
F1502
Q1506
T1N144C
Q1507
T1N144C
Q1508
T1P
144C
R
1590
10K
R1591
1M
Q1510
RT1P144
Q1514
R
T1P
144
Q1512
MMBT5551
R
1562
1.5K
R
1564
1K
C1551
10/16V
R
1567
4.7K
R
1563
3K
Q1511
MMBT5551
R1566
4.7K
R1565
4.7K
Q1513
M
M
BT5551
C1550
1000P
T1501
T1500
R
1595
1K
R
1596
3K
R1597
OPEN
R1598
OPEN
C
1563
10/16V
(H
K3770)
C
1562
10/16V
(H
K3770)
C
1560
10/16V
(H
K3770)
C
1557
10/16V
(H
K3770)
C1
56
1
100/16V
(H
K3770)
C1
56
9
10/16V
(H
K3770)
C
1568
10/16V
(H
K3770)
C1
56
6
10/16V
(H
K3770)
C
1564
10/16V
(H
K3770)
C1
56
5
10/16V
(H
K3770)
R
1582
0(H
K3770)
R
1576
0(H
K3770)
C1559
22P(HK3770)
C1567
22P(HK3770)
R
1579
0(H
K3770)
R
1577
0(H
K3770)
R1
58
3
0(H
K
3770)
C1558
50V/1uF(HK3770)
R1
57
8
0(H
K
3770)
C1556
50V/1uF(HK3770)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
IC
1511
(HK3770)
C
V
IN
JM
2753V
R
1581
0(H
K3770)
R
1575
0(H
K3770)
R
1574
0_H
K3700
R
1580
0_H
K3700
13
12
11
10
8
9
7
65
43
2
1
C
N
1511
R
1572
100K(H
K3770)
R
1573
100K(H
K
3770)
R1599
150(HK3770)
C1581
OPE
N
D
1561
HVDU
DZS9
.1
B
SR
(H
K3770)
D_FR-
D_FL-
D_FR+
D_FL+
+7V
-7V
HP_MUTE
FUNC_MUTE
FUNC_MUTE
HP_MUTE
+12V
-12V
ST+5V
POWER_FAIL
CURRENT_DET
+7V
-7V
FUNC_MUTE
TUNER_MUTE1
TUNER_SDA
TUNER_SCL
CHGND
-8V
+8V
-7V
+7V
-12V
+12V
TUNER_MUTE
-12V
TUNER_MUTE1
+3.3V_DC
NET_3.3V
BT_FR
BT_FL
BT_FN1
BT_FN2
BT_AUDIO_EN
BT_STATUS_PAIR
BT_STATUS
BT_FN3
BT_PWR_CTL
ST+5V
+12V
-12V
SPK2
SPK1
REC_MUTE
REC_MUTE
REC_MUTE
SHORT_PROTECT_IN
+12V
+12V
+12V
DC_PROTECT_IN
FAN1_ON
AUD
IO
_L
AUD
IO
_R
DA
C
_F
L
DA
C
_F
R
MIL
A
N
_L
MIL
A
N
_R
BT
_F
R
BT
_F
L
2753_CN
T1
2753_CN
T2
A
GND
A
GND
A
GND
AGND
AG
N
D
DAC_FL
DAC_FR
AD_RIN
AD_LIN
AUDIO_L
AUDIO_R
MAIN_VOL_CLK
MAIN_VOL_DATA
NJW1112_LATCH
NJW1194_LATCH
HPR-OUT
HPL-OUT
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
DAC_FR
DAC_FL
FAN2_ON
AGND
CHGND
$$$10751
+12V
+9V
+9V
+9V
+9V
Harman Kardon
HK 3770 Service Manual
Page 115 of 120
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