Kenwood TK-760G Service Manual page 30

TK-760G/ ( N
Shift Register : BU4094BCFV
Terminal function (TX-RX unit IC510)
Pin No. Port Name
4 Q1 W/N
5 Q2 MUTE
6 Q3 MBL
7 Q4 LED0
11 Q8 BSHIFT
12 Q7 AFREG2
13 Q6 AFREG1
14 Q5 LED1
Shift Register : BU4094BCF
Terminal function (TX-RX unit IC9)
Pin No. Port Name
4 Q1 HNC
5 Q2 8RC
6 Q3 8TC
7 Q4 SPMUTE
11 Q8 AUX6
12 Q7 AUX5
13 Q6 PA/LI
14 Q5 RX
30
) /762G/ ( N )
SEMICONDUCTOR DATA
Function
Not used.
MIC mute. Mute : H
MIC/LCD backlight control.
Backlight on : H
Red LED. LED lights : H
Beat shift. Shift on : H
Base band IC inter register select 2.
Base band IC inter register select 1.
Green LED. LED lights : H
Function
Horn alert control. Horn alert on : H
8R control. RX : H
8T control. TX : H
Speaker mute control. Mute on : H
Option board port 6 (AUX6). AUX on : H
Option board port 5 (AUX5).
PA/LIGHT control. PA/LIGHT on : H
TX/RX VCO switch. RX : L
LCD Driver : LC75833W
(Display Unit IC801 : TK-762G only)
Block diagram
Common
driver
INH
Clock
OSC
generator
VDD
VLCD
VLCD1
VLCD2
VSS
Terminal function
Pin No. Name I/O
1~8 S1/P1~S8/P8 O Segment output for displaying data
9~35 S9~S35 transferred from serial data.
36~38 COM1~COM3 O Common driver output. Frame
frequency fo=(fosc/384)Hz
39 VDD – Power supply for logic section
(2.7V~6.0V).
40 VLCD – Power supply for LCD driver section
(2.7V~6.0V).
41 VLCD1 I Apply 2/3 the LCD drive bias voltage
from outside. If 1/2 the bias is
applied, connect to VLCD2.
42 VCLD2 I Apply 1/3 the LCD drive bias voltage
from outside. If 1/2 the bias is
applied, connect to VLCD1.
43 VSS – GND.
44 OSC I/O Oscillation terminal.
45 INH I Force the display to turn off regardless
of internal data. Serial data can be input
regardless of whether it is "H" or "L".
46 CE I Chip enable. Serial data transfer
terminal. Connected to the
microprocessor.
47 CL I Synchronizing clock. Serial data
transfer terminal. Connected to
the microprocessor.
48 DI I Transfer data. Serial data transfer
terminal. Connected to the
microprocessor.
Segment driver & latch
Shift register
Address
detector
Function