Sony STR-DB840 Service Manual page 56

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