Printed Wiring Board - Power Key Board; Schematic Diagram - Power Key Board - Sony STR-DH550 Service Manual

5-28. PRINTED WIRING BOARD – POWER KEY Board –
• See page 14 for Circuit Boards Location.
1 2 3
A
POWER KEY
BOARD
B
C
LP110
DISPLAY
BOARD
CN100
(Page 37)
D
>010P
CN108
E
1 3 8 CL166
CL163
CL161
CL165
CL160
CL162
CL164
Q110
R176
E
S115
F
&/1
R178
Q111
E
D110
LED ON/STBY)
G
H
I
J
K
STR-DH550/DH750
•
: Uses unleaded solder.
4 5 6
S111
TUNING +
S112
TUNING –
LP111
S113
TUNING MODE
S114
SPEAKERS
12
(12)
1-889-542-
5-29. SCHEMATIC DIAGRAM – POWER KEY Board –
7 8
1
A
POWER KEY BOARD
B
C
D
LED_ON
41 41
2 3 4 5
S114
R183
SPEAKERS
22k
S113
R174 R179
2.2k 100k
TUNING
R180
MODE
10k
R176
D110
47
SML78423C-TP15
Q110 LED (ON/STBY)
S112
2PD601ART
GRN
LED DRIVER
TUNING – R182
R175
4.7k
100
ORG
Q111
S111
2PD601ART
LED DRIVER
TUNING + R181
R178
2.2k
100k
CL160
S115
CL161
R173 "/1
10k
CL162
CL163
CL164
CL165
CL166
STR-DH550/DH750
6 7
CN108
8P
1 AD1
>024S
3 POWER_BUTTON
DISPLAY
4 DGND
BOARD
5 NC
6 +3.3V_STBY
CN100
7 LED_ON
(Page 38)
8 LED_STBY