Read Sony HT-K25 / TA-VE25 Service Manual online
14
14
TA-VE25
3-7.
IC Pin Function Description
• IC203
MB90553ABPF-G-223-BND SYSTEM CONTROL (DISP Board)
Pin No.
1
2
3
4
5
6
7
8
9, 10
11
12 to 17
18
19
20
21
22
23
24
25
26
27
28, 29
30
31
32, 33
34
35
36
37
38
39
40, 41
42
43
44
45, 46
47
48
49
50
51
52
53
54
55
56
57
58
I/O
O
O
O
O
O
O
O
—
—
—
—
—
O
I
O
O
—
O
O
—
—
—
O
I
—
—
—
—
—
I
I
—
—
I
I
—
I
—
I
I
I
I
—
I
I
I
—
—
Pin Name
LED1
LED2
LED3
LED4
LED5
LED6
LED7
P27
P30, P31
VSS
P32 to P37
P40
FALSH DATA OUT
COMOUT
FALSH DATA IN
COMIN
FL CLK
FL DATA
VCC
FL BK
FL LATCH
P47
C
P50, P51
BUSYOUT
BUSYIN
P54, P55
AVCC
AVRH
AVRL
AVSS
KEY INPUT1
KEY INPUT2
P62, P63
VSS
JOGA
JOGB
P66, P67
STOP
P DOWN
MD0
MD1
MD2
HST
SIRCS
IRA
IRB
POWER SW
SELA
SELB
Description
MUTING LED control signal output “L” : ON
TV LED control signal output “H” : ON
VIDEO LED control signal output “H” : ON
AUX LED control signal output “H” : ON
SAT LED control signal output “H” : ON
DVD LED control signal output “H” : ON
SIR LED control signal output “L” : ON
General purpose I/O port Not used (ground)
General purpose I/O port Not used (ground)
Ground
General purpose I/O port Not used (ground)
General purpose I/O port Not used (ground)
UART serial data output to the subwoofer unit and flash programming port
UART serial data input from the subwoofer unit and flash programming port
Clock output to the fluorescent indicator tube (FL201)
Serial data output to the fluorescent indicator tube (FL201)
Power supply
Blanking signal output to the fluorescent indicator tube (FL201)
Latch signal output to the fluorescent indicator tube (FL201)
Not used (ground)
Capacitor connection terminal for regulating the power supply
Not used (ground)
Busy signal output to the subwoofer unit
Busy signal input from the subwoofer unit
Not used (ground)
A/D converter power supply
A/D converter external reference voltage source
A/D converter external reference voltage source
A/D converter power supply
Key signal input from the function switches (S202 to S206)
Key signal input from the function switches (S202 to S209)
General purpose I/O port Not used (ground)
Ground
Rotary encoder data input from the master volume (RV201)
Rotary encoder data input from the master volume (RV201)
General purpose I/O port Not used (ground)
AC OFF signal input “L” : AC OFF
Not used (fixed at “H”)
Operation mode setting input (normally fixed at “H”)
Operation mode setting input (Vcc)
Operation mode setting input (normally fixed at “L”)
Hardware standby signal input (connected to RESET)
Not used (ground)
Remote control receiver data input from the IC201
Remote control receiver data input from the IC204
Power key input
General purpose I/O port Not used (ground)
General purpose I/O port Not used (ground)
Pin No.
59 to 66
67
68
69
70
71 to 74
75
76
77
78 to 80
81
82
83
84
85 to 92
93 to 100
I/O
—
O
O
O
O
—
O
—
I
—
—
—
—
—
—
—
Pin Name
P80 to P87
CTLA
CTLB
CTLC
CTLD
P94 to P97
RST OUT
PA1
RESET
PA2 to PA3
VSS
X0
X1
VCC
P00 to P07
P10 to P17
Description
General purpose I/O port Not used (ground)
Analog input selection signal output
Digital input selection signal output
Digital input selection signal output
Digital input selection signal output
General purpose I/O port Not used (ground)
Subwoofer reset signal output “L” : reset
General purpose I/O port Not used (ground)
Reset signal input
General purpose I/O port Not used (ground)
Ground
Oscillation pin
Oscillation pin
Power supply
General purpose I/O port Not used (ground)
General purpose I/O port Not used (ground)
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