Sony STR-DB830 - Fm Stereo/fm-am Receiver Service Manual page 34

Fm stereo fm-am receiver
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IC102
MB90553APF-G-138-BND DISPLAY CONTROL(DISPLAY BOARD)
Pin No.
Pin Name
I/O
1
LED PHONE
O
2
LED
O
3
LED
O
4
LED
O
5
LED
O
O
6
7
POWER RY
O
8
5V CHECK
O
9
10
11
VSS
12
13
14
15
16
17
18
19
FLASH DATA OUT
O
20
FLASH DATA IN
I
21
FL CLK
O
FL DATA
O
22
23
VCC
24
FL LAT
O
25
FL CLEAR
O
26
SIRCS IN
I
27
C
28
29
30
31
32
33
34
AVCC
35
AVRH
36
AVRL
37
AVSS
38
KEY INPUT 1
I
39
KEY INPUT 2
I
40
KEY INPUT 3
I
41
KEY INPUT 4
I
42
VSS
43
AD KEY IN 5
I
44
AD KEY IN 6
I
45
AD KEY IN 7
I
RDS SIGNAL
I
46
47
STOP
I
48
49
MD 0
I
50
MD 1
I
PHONO display data output to LED.
TUNER display data output to LED.
CD display data output to LED.
MD/DAT data output to LED.
TAPE display data output to LED.
Not used. (Connected to Ground)
Power reay display.
Power check (+5V)
Not used. (Connected to Ground)
Not used. (Connected to Ground)
Ground (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)
Not used. (Connected to Ground)
Not used. (Connected to Ground)
UART data output to rewrite flash memory
UART data intput to rewrite flash memory
Clock output to flourescent display tube
Data output to flourescent display tube
Power supply +5 V
Fluorescent latch
Fluorescent clear
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)
Ground (Connected to Ground)
Key input 1
Key input 2
Key input 3
Key input 4
Ground (Connected to Ground)
Key input 5
Not used (Pull up)
Not used (Pull up)
RDS signal input (AEP only)
Stop input
Not used (Connected to Ground)
MD 0
MD 1 (Connected to power supply +5 V)
— 56 —
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