56
Pin No.
Pin Name
I/O
Description
1
EQ
O
EQUALIZER indicator (D123) drive signal output terminal “L”: on
2
SUR
O
SURROUND indicator (D122) drive signal output terminal “L”: on
3
LEVEL
O
LEVEL indicator (D119) drive signal output terminal “L”: on
4
NAME
O
NAME indicator (D151) drive signal output terminal “L”: on
5
SETUP
O
SET UP indicator (D152) drive signal output terminal “L”: on
6
VOLUME
O
VOLUME indicator drive signal output terminal “L”: on Not used (open)
7
MUTING
O
MUTING indicator (D101) drive signal output terminal “L”: on
8
NC
—
Not used (open)
9
VOLUP
O
Motor drive signal (volume up direction) output to the volume motor drive (IC105)
10
VOLDOWN
O
Motor drive signal (volume down direction) output to the volume motor drive (IC105)
11
VSS
—
Ground terminal
12
5V CHECK
O
Power check terminal
13
POWER RY
O
Power relay drive signal output terminal “H”: on
14 to 17
NC
—
Not used (fixed at “L”)
18
SIRCS IN
I
SIRCS input from the remote control receiver (IC101)
19
FLASH DATA OUT
O
Serial data output to the system controller (IC1201) (rewrite flash memory)
20
FLASH DATA IN
I
Serial data input from the system controller (IC1201) (rewrite flash memory)
21
FL CLK
O
Clock signal output to the fluorescent display tube
22
FL DATA
O
Serial data output to the fluorescent display tube
23
VCC
—
Power supply terminal (+5V)
24
FL LAT
O
Latch signal output to the FL display driver (IC103)
25
FL CLEAR
O
Clear signal output to the FL display driver (IC103)
26
OSD CLK
O
OSD clock signal output to the select switch (IC2004) (used for STR-DB940 only)
27
C
—
External power regulator capacitor is connected to this terminal
28
OSD DOUT
O
OSD serial data output to the select switch (IC2004) (used for STR-DB940 only)
29
NC
—
Not used (fixed at “L”)
30
NC
—
Not used (open)
31 to 33
NC
—
Not used (fixed at “L”)
34
AVCC
—
Power supply terminal (+5V) (analog system)
35
AVRH
—
Connected to power supply
36
AVRL
—
Connected to ground
37
AVSS
—
Ground terminal (analog system)
38
AD KEY IN 1
I
Key input terminal (A/D input) (S111 to 118)
39
AD KEY IN 2
I
Key input terminal (A/D input) (S121 to 125)
40
AD KEY IN 3
I
Key input terminal (A/D input) (S131 to 137)
41
AD KEY IN 4
I
Key input terminal (A/D input) (S141 to 149)
42
VSS
—
Ground terminal
43
AD KEY IN 5
I
Key input terminal (A/D input) (S151 to 157)
44
AD KEY IN 6
I
Key input terminal (A/D input) (S161 to 165)
45
AD KEY IN 7
I
Key input terminal Not used (fixed at “L”)
46
RDS SIGNAL
I
FM IF signal input from the FM/AM tuner unit (TM301)
47
STOP
I
Stop signal input from the power control (IC1206)
48
NC
—
Not used (fixed at “L”)
49
MD0
I
MD 0 signal input from the system controller (IC1201)
50
MD1
I
MD 1 signal input terminal (fixed at “H” in this set)
• DISPLAY BOARD IC102 MB90553ABPF-G-169-BND (DISPLAY CONTROLLER)
