4-8. Ic Pin Function Description - Sony TA-FE370 Service Manual

TA-FE370/FE570
• IC Block Diagrams
– MAIN Board –
IC101 LC7821
L1 1
L2 2
L3 3
L4
4
L COM1 5
L5
6
L6 7
L COM2 8
L7 9
L8 10
L COM3 11
LEVEL SHIFT
VEE 12
CE 13 LATCH
DI
14
SHIFT RESISTER
CL 15
BUFFER
– CONTROL Board –
IC802 BA6208
MOTOR
SWITCH
DRIVE
MOTOR
SWITCH
DRIVE
REG
1 2 3 4 5 6 7 8
IC601 µPC1237HA
30 R1
OVER LOAD DET
29 R2
F/F
R3
28
OFFSET DET
27 R4
26 R COM1
LATCH/
AUTORESET
25 R5
AC OFF
24 R6
DET
23 R COM2
R7
22
1 2 3 4 5 6
21 R8
20 R COM3
19
VDD
18 RES
17 S
16 VSS
9

4-8. IC PIN FUNCTION DESCRIPTION

• CONTROL BOARD IC801 TMP47C103N-JP47 (FUNCTION SWITCH CONTROL, LED DRIVER)
Pin No. Pin Name
1 XOUT
2 XIN
V CC ON
3 RESET
MUTE
4 PMD
5 VOL+
6 VOL–
7 to 9 SW0 to SW2
10 EON
7 8
11 PHONO
12 TUNER
13 CD
14 GND
15 AUX
16 TAPE2
17 TAPE1
18 MON
19 PRY
20 PKY
21 MON
22 SIRCS
23 MUTE
24 SCE
25 SDT
26 SCK
27 STOP
28 +3V
14 14
I/O Description
O Main system clock output terminal (4 MHz)
I Main system clock input terminal (4 MHz)
System reset signal input terminal "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I Setting terminal for the model (Fixed at "H" in this set)
O Motor drive signal output to the volume motor drive (IC802) (volume up direction)
O Motor drive signal output to the volume motor drive (IC802) (volume down direction)
I Rotary switch input of the INPUT SELECTOR (S801)
Detection signal input of the enhanced other networks (EON) (Used for the TA-FE570)
I
TA-FE370: Not used (fixed at "H")
O LED drive signal output of the PHONO LED (D808) "L": LED on
O LED drive signal output of the TUNER LED (D809) "L": LED on
O LED drive signal output of the CD LED (D810) "L": LED on
— Ground terminal
O LED drive signal output of the AUX LED (D811) "L": LED on
O LED drive signal output of the TAPE2/MD LED (D812) "L": LED on
O LED drive signal output of the TAPE1/DAT LED (D813) "L": LED on
Tape monitor on/off control signal output terminal "L": tape monitor on
O
(Used for the TA-FE570) TA-FE370: Not used (pull up)
O Power on/off relay drive signal output "L": power on, "H": standby mode
I POWER switch (S1) input terminal "H": power on
TAPE1 MONITOR switch (S802) input terminal "H" input when key pressing
I
(Used for the TA-FE570) TA-FE370: Not used (fixed at "L")
I Sircs signal input from the remote control receiver (IC803)
O Audio line muting on/off control signal output "H": muting on
O Chip enable signal output to the function switch (IC101)
O Serial data output to the function switch (IC101)
O Serial data transfer clock signal output to the function switch (IC101)
I Detection signal input of the AC input
— Power supply terminal (+3V)