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Harman Kardon
6
Division : CY91
USA
EUR
USA
3770 : 400V 152 M
3770 : 400V 152 M
3770 : 400V 102 M
3700 : 400V 152 M
3700 : 400V 152 M
3700 : 400V 152 M
TH91
DSC-2.5D20
D
L
F901
N
LF93
RING-616/120uH Min
CN90
BD91
YW396-03AV
3512
J904
BD95
12.5mm
Not used
Q926
2SC6046
R966
D907
1N4448W
22
R910 33
1
C
Q921
2907AS
R912
1K1
CY95
400V 102 M
CY97
R914
R913
Not used
0R1 1W
0R1 1W
+BV
HS91
CHGND
HEAT SINK
6
5
4
3
2
1
1
PGND
HS96
For Q904
HEAT SINK
D913
D932
PGND
B
S1M
S1M
R897
15K
PGND
+BV
J911
R927
1
2
7.5mm
1.2M
J913
15mm
J919
D914
MM1Z20
10mm
J907
J918
15mm
10mm
PC95
J917
EL817B
6mm
PGND
PGND
J915
10mm
J903
DGND
7.5mm
J905
12.5mm
R969
J927
0 ohm
12.5mm
A
PGND
PGND
11
10
9
8
7
6
5
4
3
2
ET92
CJT1A026
DGND
11
10
9
8
7
6
5
4
3
2
ET91
CJT1A026
CHGND
5
Division : CY92
Division : CY96
HK37X0 SMPS SCHEMATIC DIAGRAM
EUR
USA
EUR
3770 : JUMPER
3770 : 400V 102 M
3770 : JUMPER
3700 : 400V 152 M
3700 : 400V 152 M
3700 : 400V 152 M
J912
+BV
15mm
4
1
DB91
LF92
LF91
RS1005M
SQE2930/8mH
SQE2930/8mH
J938
Not used
J948
100V : Used
CY96
230V : Not used
20mm
400V 152 M
CHGND
R915
68K
D904
Division : C901
USA
EUR
PGND
R901
3770 : 250V 270uF
3770 : JUMPER
3770 : 250V 270uF
3K9
3700 : 250V 220uF
3700 : JUMPER
3700 : 250V 220uF
IC93
ICE2QS02G
Q902
A708Y
VINS
7
6
GATE
VCC
3
1
R881
2
100
ZC
D915
C904
4
3
2
CS
R937
FB
Not used
50V 105 K
BL
C920
PGND
1K
50V 47uF
R918
20K
2
C909
R931
PGND
50V 821 J
820K
TS92
110 /70mm
℃
IC92
C915
D917
D918
D920
R893
OB2263MP
50V 105 K
MM1Z18
MM1Z20
FFM107
47
6
5
GATE
VDD
3
1
4 SENSE
R936
Q903
2
A708Y
C921
1K
50V 22uF
PGND
J906
PGND
20mm
R896
R776
470
0 ohm
J914
D916
10mm
MM1Z12
J916
R909
C917
10K
R961
C903
100K
50V 102 K
D901
10mm
R990
50V 471 J
AC-L
S1M
10 1W
+BV
C902
D902
450V 22uF
PGND
AC-N
S1M
R925
R929
D910
PGND
1.2M
1.2M
J908
D911
UF4007
US1M
10mm
R932
R922
4R7
10
Drain
D905
2
VDD
6
PGND
Not used
R923
Drain
1
VDDG
5
PGND
1K
GND
8
FB
3
GND
7
CS
4
IC91
OB2358L
R967
R972
R970
R971
R928
PGND
10
10
10
10
10
PGND
PGND
PG91
1
11
10
9
8
7
6
5
4
3
2
1
ET95
CJT1A026
DGND
1
11
10
9
8
7
6
5
4
3
2
1
ET93
DGND
CJT1A026
4
3
HS92
TF93
HEAT SINK
J901
J902
ER5345V
12.5mm
20mm
J961
9
17
R903
10mm
18
J962
47 2W
10mm
C910
8
10
1KV 222 K
7
11
D906
D944
PC90-B
US1M
US1M
EL357NB
6
12
5
13
R911
4
14
PGND
0 ohm
US1M
3
15
2
Division : C930
USA
EUR
1
16
3770 : 450V 150uF
3700 : 450V 120uF
PGND
R777
4
1
J910
D909
+BV
0 ohm
15mm
MM1Z20
2
3
DGND
D908
PC93
PGND
R765
MM1Z24
EL357NB
1R5 1W
ADD : Tube (5PIE*20mm)
TF92
EE2525
R907
1
14
68K 1W
2
13
D903
US1M
PC99-A
3
12
EL357NB
4
11
1
D939
10
31DQ06-FC5
5
DGND
(60V/3A)
D938
6
9
31DQ06-FC5
(60V/3A)
D934
8
Not used
7
10V 5600uF
3
2
PGND
PGND
PC2
7VD
4
1
560
PC96
PC94
R986
EL357NB
EL357NB
4
1
3
2
3
2
R991
PC1
PGND
S5V
1K
4
1
2
PC91
560
D943
EL357NB
R938
UF4004
10
J931
1
1
3
Q914
10mm
A708Y
9
2
8
C949
DGND
DGND
100V 10uF
C923
104
7
3
6
4
S5V
PGND
5
DGND
D921
TF91 EE1625
11EQ06
R934
(60V/1A)
4
1
560
PGND
3
2
DGND
PC92
EL357NB
C914
CY93
50V 472 K
400V 102 M
PGND
PGND
DGND
CY94
PGND
DGND
400V 102 M
PGND
PG92
**IMPORTANT SAFETY NOTICE.
Division : CY93
COMPONENTS IDENTIFIED BY MARK HAVE SPECIAL CHARACTERISTICS.
USA
EUR
3770 : 400V 102 M
3770 : 400V 102 M
IMPORTANT FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS.
3700 : 400V 102 M
3700 : 400V 102 M
USE ONLY MANUFACTUREY'S SPECIFIED PARTS.
**THE UNIT OF RESISTANCE IS OHM. K=1000 OHM, M=1000 KOHM
Division : CY94
**THE UNIT OF CAPACITANCE IS MICROFARAD (uF)pF=10 uF
USA
EUR
3770 : 400V 102 M
3770 : 400V 471 M
**THIS SCHEMATIC DIAGRAM MAY MODIFIED AT ANY TIME WITH THE
3700 : 400V 102 M
3700 : 400V 102 M
IMPROVEMENT OF PERFORMANCE
2
DGND
D942
R997
R999
R963
FCU20A40
(400V/20A)
L924
56KF
56KF
0 ohm
D950
1.8uH
MM1Z22
C956
L929
1KV 102 K
1.8uH
C981
Not used
PC99-B
EL357NB
HS93
L930
HEAT SINK
1.8uH
DGND
D952
FCU20A40
L928
(400V/20A)
1.8uH
R778
R930
PC97
R933
0R01 J 5W
4
37K4F
1
EL817B
C957
R987
R985
180
Not used
1KV 102 K
2
1K8
3770 : H->L 46V
3
PC98
R957
3700 : H->L 39V
R962
EL817B
DGND
4
1
C982
Not used
R989
180
R948
43KF
0 ohm
2
1K8
3770 : H->L 39V
R767
3
PC89
R774
3700 : H->L 33V
Not used
EL817B
DGND
4K7
4
IC94
1
KA431SAMF2
R768
R773
180
1
R944
2
3
2
1K8
3770 : H->L 30V
3
30KF
3700 : H->L 27V
DGND
R775 0 ohm
Q917
RT1N141C
2
2
VOL_SEL_1
Q918
R894 47
D953 1N4448W
D933
RT1N141C
L922
IC97
J934
SF26
100MHz_60ohm_6A
7812A
(400V/2A)
6mm
C925
104
C926
R891
R892
D937
104
1K
1K
(400V/2A)
L923
100MHz_60ohm_6A
SF26
J925
J923
IC98
7VD
J920
HS95
7912A
20mm
10mm
20mm
For IC97
HEAT SINK
J921
DGND
R945
12.5mm
C941
D+7V
560
DGND
L925
DGND
DGND
7uH
R951
R958
Not used
10KF
C934
R954
J943
50V 105 K
4K7
10mm
IC95
R959
R956
5K6F
KA431SAMF2
47K
R940
15K
DGND
3
1
VKK
IC99
78L24
2
2
Q909
PC2
DGND
RT1N141C
DGND
J955
L921
6mm
J947
6mm
7.5mm
R946
Q915
C944
C924
DGND
10KF
RT1N141C
6.3V 1000uF
50V 222 K
R942
2K2
IC96
R964
R947
KA431SAMF2
Not used
10KF
DGND
DGND
MP
-6
HK 3770 Service Manual
1
DGND
HS92
HS93
HEAT SINK
HEAT SINK
1
2
1
2
DGND
DGND
G
CN20
VCC(+)
DGND
J966
10mm
VCC(-)
DGND
Q928
D955
RT1N141C
1N4448W
VOL_SEL_2
2
2
R770
CN66
Q927
47
VKK
+38V
RT1N141C
VOL_SEL_1A
7
R771
DGND
6
1K
PC90-A
DGND
ST5V
VOL_SEL_2
EL357NB
ST+5V
J933
5
R772
1K
7.5mm
+12V
+12V
4
VOL_SEL_3
AGND
3
HS94
For IC97
-12V
-12V
HEAT SINK
2
GND
J922
DGND
1
D922
1N4448W
DGND
7.5mm
1
3
+12V
2
BN65
C932
VOL_SEL_1
50V 47uF
VOL_SEL_1
R766 0 ohm
VOL_SEL_2
VOL_SEL_2
1
VOL_SEL_3
VOL_SEL_3
2
3
DGND
DGND
-12V
D936
DGND
1N4448W
D+7V
J935
15mm
D+7V
-12V
-12V
Q916
RT1N141C
AGND
2
+12V
+12V
ST+5V
DGND
PC1
ST+5V
DGND
R984
47
POWER_HI
ST5V
R988
AMP_VCC_ON
R996
47
0 ohm
POWER_DOWN
J944
TS91
1
2
12.5mm
Not used
J942
J963
17.5mm
20mm
J939
J940
17.5mm
10mm
J930
2
J932
17.5mm
10mm
J926
J950
12.5mm
7.5mm
J936
12.5mm
J929
J928
DGND
DGND
10mm
10mm
DGND
DGND
REVISION
2
4
6
1
3
5
7
SCHEMATIC DIAGRAM
SHEET
ISSUE
26
HK37X0
MODEL
ANAM
MULTI. LAB
DESIGN
CHECK
APPROVE
DRAWING NO
12610SCMZ
2013.07.22
X.X.X
X.X.X
Y.W.Y
(SMPS)
1
Page 117 of 120
13.07.22
13.07.22
13.07.22
D
C
B
A
27
1
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