Block Diagram - Key/Display Section - Sony STR-DE685 Service Manual

4-4. BLOCK DIAGRAM — KEY/DISPLAY SECTION —
VIDEO SW1 90 SW1
VIDEO
89 SW2
VIDEO SW2
5
VIDEO SW
SECTION
VIDEO SW3 88 SW3
(Page 20)
VIDEO SW4 87 SW4
J254
I/O 65 CONTROL A1 IN
CTRL BUFFER
64 CONTROL A1 OUT
A1
Q1607,D1603
83
X1
X1601
20MHz
EEPROM
82 X0
IC1604
5 34 SDA
SDA
EEPROM
SCL
6 33 SCL
S142
SPEAKER
A/B
S141
/ I
I
56 POWER KEY
CNS3
FLASH1
1
28 SP SWITCH/FLASH1
FLASH2
2 27 FLASH2
MD2
FLASH
7 51 MD2
PROGRAMMING MD0
49 MD0
6
RESET
5
RESET
+3.3V
IC1602
(STBY)
2 1 77 RSTX
BUFFER
IC101
5
DIN 61
4
FL DRV/
2
LED DRV
CLK 62 1
+5V-1
10
9
FL_STB 63
MCH LED 29
AFD
32
SYSTEM
2CH 31
CONTROL
IC1601 (3/4) MODE 30
DCS LED 26
SIRCS 54
VOL(A) 60
VOL(B)
59
JOG(A) 58
JOG(B) 57
A/D0
38
A/D1 39
A/D2 40
A/D3 41
19 19
FL101
FLUORESCENT
F1
INDICATOR
TUBE F2
14 - 29 42 - 31 Q109
6 SEG1-16 GRID1-16
SW1 1
7 DIN
3
SW2 2
8 CLK
FL DISPLAY
LED DRIVER
DRIVER
SW3 3
Q106-108
IC100
8
9 STB
4
SW4
MCH-LED
AFD-LED
LED
2CH-LED
DRIVERS
MODE-LED Q100-104
DCS-LED
RV102
1
MASTER
3
VOLUME
RV101
1
ROTARY ENCODER
3
(JOG DIAL)
SW NETWORK S100-109
SW NETWORK S110-118
SW NETWORK S120-127
SW NETWORK S130-139
STR-DE685
+5V-1
Q111
Q110
LED
MATRIX
D110-114
D100,
D102-104
REMOTE
SIRCS
CONTROL
1 OUT
RECEIVER
IC102