Harman Kardon AVR 7550HD Service Manual page 185

9
10
G
F
15V
GND
MUTE1
PRO+3DB
SWOUT
E -15V
*** THE UNIT OF RESISTANCE IS OHM.
D K=1000 OHM, M=1000 KOHM.
*** THE UNIT OF CAPACITANCE IS MICROFARAD (uF)
-6
pF=10 uF
*** THIS SCHEMATIC DIAGRAM MAY MODIFIED AT ANYTIME WITH THE
IMPROVEMENT OF PERFORMANCE.
C
B
A
8 7
AVR 7550HD
Schematic Diagram
SUB WOOFER2 BLOCK: ONLY AVR7550HD & AVR760
R1257
0(1/16W)
5
I+
7
OUT
6
I-
NJM2068M
IC1005-B
R1036
1K(1/16W)
Q1038
C1067
R1041
KRA107S
2N2/50 1
Q1014 2K4(1/16W)
1
KRA107S
R1040
2
2
9K1(1/16W) R1031
C1060
GND 2 2K2(1/16W)
Q1012
Q1013 I-
C1210 10UF/16V
KTD1304
KTD1304 1 3 R1326
2N2/50 OUT
3
3
I+ NJM2068M R1248
C1071 1K(1/16W)
R1255 C1072
10UF/16V
IC1005-A
470(1/16W)
OPEN
R1256
SUB-WOOFER2 GAIN CIRCUIT
AVR660 AVR7550HD/AVR670
0(1/16W)
SUB-WOOFER2
NO USED
6 5
harman kardon
AVR7550HD/760/660PROCESSOR 2/2
SW2MUTE
VCC
R1327
47K(1/16W)
R1320
47K(1/16W)
R1324 JA1004
2
47K(1/16W)
R1111
47K(1/16W)
1
SUBWOOFER2
470(1/16W)
RCA-115AG-06
SUB-WOOFER2
USED
185
3
4 2
harman/kardon
1
REVISION RECORD
NO. Date Contents
Category AV RECEIVER Model
AVR7550HD/760/660
Stage Ver. Sheet B'D name
MP V4.10 / PROCESSOR
Draw Approved Date Drawing No
APR.13.2009
DANECH
COMPANY LTD.