Harman Kardon HS300 Service Manual page 106

5
HS300
D
C
D+5V
B
A
5
4
VOLUME KNOB
W601
C601 820P
C602 820P
E
D+5V
CN609
9
D+5V
8
7
VOL+
6
VOL-
5
AC1
4
AC2
3
-29V
2
FRONT_LED
1
9pin 2.0mm
DGND
U605 LM9022
1 8
SHUTDOWN VO2
C624105
2 7
BYPASS GND
3 6
D+5V
+IN VDD
EC606
4 5
-IN VO1
47uF/50V
C625 D606 D607
123
1N4148 1N4148
Function describe: supply power for VFD and VFD driver.
V611 V612 V613 V614
4
3
D+5V
R616
10K N/A
R617
FRONT_LED R618
EC607 EC608 EC609 EC610 EC611 EC612
47uF/50V 47uF/50V 47uF/50V 47uF/50V 47uF/50V 47uF/50V
D608 D609 D610 D611 D612
1N4148 1N4148 1N4148 1N4148 1N4148
106
3
2
harman/kardon
D+5V
4.7K
4.7K
Q604 Q605
8550 8550
R622 R623 R624 R625
180R 180R 180R 180R
LED603 LED604 LED605 LED606
LED LED LED LED
D+5V
EC603
C614 47uF/16V
104
DGND
EC605 47uF/50V AC1
R638
DZ601
100R
R639 100K
EC613
ZENER 6.2V 0.4W
R641
100R
EC614 47uF/50V AC2
47uF/50V
D613 D614
-29V
1N4148 1N4148
EC615 R652 R653 R654
47uF/50V 15k 15k 15k
Title
HT1/HT2 FRONT PANEL: Volume board
Size Document Number
A3
Date:
2
1
D
C
B
A
060405
Rev
1820C 1.5
Tuesday, May 23, 2006 Sheet 18 of 20
1