Read Harman Kardon HD 990 (serv.man7) Service Manual online
5
5
4
4
3
3
2
2
1
1
E
E
D
D
C
C
B
B
A
A
-26V
SPI pull-up resistors
assembled on front
board
assembled on front
board
■■■ NET "+5V_VFD"--1A;
5604C
1.5
HD990 main board
Harman Kardon
A3
5
9
Tuesday, October 07, 2008
Title
Size
Document Number
Rev
Date:
Sheet
of
drawn by
ABC PCB S鄏l
Ch. du Saux 17
CH-1131 Tolochenaz
-29V
DATA/SDA
CLOCK/SCL
AC1
AC2
VFD_STB
IR
IR_IN
REMOTE_IR
SCK
CS_75711
MOSI
+5V_VFD
+3.3V
D5V
D5V
R161
10K
R154
0R
D11
LL4148
1
2
D7
LL4148
1
2
+
CE26
47uF/50V
1
2
D8
LL4148
1
2
C80
1uF
R158
15K
C83
100nF
R152
10K
1
3
5
7
9
11
13
14
12
10
8
6
4
2
CN1
CON14_1.25MM_DIP_2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+
CE23
47uF/50V
1
2
R150
100R
D6
LL4148
1
2
+
CE22
47uF/50V
1
2
R164
100R
D4
LL4148
1
2
D3
LL4148
1
2
+
CE25
47uF/50V
1
2
R155
10K
+
CE24
47uF/50V
1
2
R151
100K
D10
LL4148
1
2
R160
15K
R166
390R
R163
100R
+
CE19
47uF/50V
1
2
U25
LM9022
1
2
6
3
4
7
5
8
SN
SYS
VDD
+IN
-IN
GND
VO1
VO2
C82
10nF
D5
LL4148
1
2
R162
100R
R165
240R
D9
LL4148
1
2
DZ1
ZENER 6.2V 0.4W
1
2
+
CE21
47uF/50V
1
2
+
CE27
47uF/50V
1
2
+
CE30
47uF/50V
1
2
R159
15K
C81
100nF
R157
2.2K
+
CE28
47uF/50V
1
2
R153
100R
100R
G3
3EN1[BA]
3EN2[AB]
1
2
U26
SN74HCT245PWR
19
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
10
20
+
CE29
47uF/50V
1
2
R149
0R
R156
10K
harman/kardon
HD 990/230 Service Manual
Page 40 of 46
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