Ic Pin Functions - Sony STR-DB925 Service Manual

3-25. IC PIN FUNCTIONS

• IC102 MB90553PF-G-121-BND (DISPLAY BOARD)
Pin No. Pin Name
1
LED V1
2
LED V2
3
LED V3
4
LED-DVD/LD
5
LED-TV/DBS
6
LED-TAPE
7
LED-MD/DAT
8
LED-CD
9
LED-TUNER
10
LED-PHONO
11
VSS
12
—
13
—
14
LED SUR
15
LED EQ
16
LED INDEX
17
—
18
—
19
SOT0
20
SIN0
21
FL CLK
22
FL DATA
23
VCC
24
FL LAT
25
FL CLEAR
26
SIRCS IN
27
C
28
—
29
—
30
—
31
—
32
—
33
—
34
AVCC
35
AVRH
36
AVRL
37
AVSS
38
AD KEY IN 1
39
AD KEY IN 2
40
AD KEY IN 3
I/O
O VIDEO 1 VISUAL display data output to LED
O VIDEO 2 AUDIO display data output to LED
O VIDEO 3 VISUAL display data output to LED
O DVD/LD AUDIO display data output to LED
O DVD/LD VISUAL display data output to LED
O TV/DBS AUDIO display data output to LED
O TV/DBS VISUAL display data output to LED
O TAPE display data output to LED
O MD/DAT display data output to LED
O CD display data output to LED
– Ground (Connected to Ground)
– Not used. (Connected to Ground)
– Not used. (Connected to Ground)
O CURSOR MODE SURROUND display data output to LED
O CURSOR MODE EQUIPMENT display data output to LED
O CURSOR MODE INDEX display data output to LED
– Not used. (Connected to Ground)
– Not used. (Connected to Ground)
O UART data output to rewrite flash memory
I UART data intput to rewrite flash memory
O Clock output to flourescent display tube
O Data output to flourescent display tube
–
Power supply +5 V
O Fluorescent latch
O Fluorescent clear
I SIRCS input
–
External power regulator capacitor 0.1µ is connected to this terminal.
– Not used (Connected to Ground)
– Not used (Connected to Ground)
– Not used (Connected to Ground)
– Not used (Connected to Ground)
– Not used (Connected to Ground)
– Not used (Connected to Ground)
–
Analog power supply +5 V
– AVRH (Connected to power supply +5 V)
– SVRL (Connected to Ground)
– GND (Connected to Ground)
I Key input 1
I Key input 2
I Key input 3
– 60 –
Function