Ic Block Diagrams; Ic Pin Function - Sony TA-FB930R Service Manual

3-10. IC BLOCK DIAGRAMS

• Main Board
IC700 uPC1237HA
OVER LOAD DET
V CC ON
F/F
MUTE
OFFSET DET
LATCH/
AUTORESET
AC OFF
DET
V CC
1 2 3 4 5 6 7 8
• Panel Board
IC901 BA6208
MOTOR
SWITCH
DRIVE
MOTOR
SWITCH
DRIVE
REG
1 2 3 4 5 6 7 8 9

3-11. IC PIN FUNCTION

• IC902 Input Control & LED Drive (TMP47C103N-JP47) (Panel Board)
Pin No. Pin Name
1 X OUT
2 X IN
3 RESET
4 PMD
5 VOL +
6 VOL –
7 SW 0
8 SW 1
9 SW 2
10
EON
11
PHONO
12
TUNER
13
CD
14
GND
15
AUX
16 MD/DAT
17 TAPE
18 MON
19 PRY
20 PKY
21 MOI
22 SIRCS
23 MUTE
24 SCE
25 SDT
26 SCK
27 STOP
28
+3V
14 14
I/O Function
O
System clock (4MHz)
I
I Reset input
I Mode select input (Connected to ground)
O Motor drive output (+)
O Motor drive output (–)
I
Rotary switch input (CD)
I
Rotary switch input (TUNER)
I
Rotary switch input (PHONO)
I EON signal input
O PHONO LED drive output
O TUNER LED drive output
O CD LED drive output
— Ground
O AUX LED drive output
O TAPE "2" LED drive output
O TAPE "1" LED drive output
O MONITOR output (Connected to ground)
O Power relay output
I Power key input (Connected to ground)
I MONITOR input (Connected to ground)
I SIRCS input
O Muting output (Connected to ground)
O Chip enable output (Connected to ground)
O
Serial data output (Connected to ground)
O
Serial clock output (Connected to ground)
I
STOP input
—
+3V Power supply