Kenwood TK-480 - Manual (Page 22)

21
TK-480/481
Shift Register 1 : BU4094BCFV (TX-RX U
nit IC18)
Pin No. Port Port name Function
1 STRB ES Strobe
2 DATA DAT Data
3 CLK CK Clock
4 Q1 LEDR Red LED. H : On, L : Off
5 Q2 LEDG Green LED. H : On, L : Off
6 Q3 KEYBLT Key backlight. H : On, L : Off
7 Q4 MMUTE MIC mute. H : Unmute, L : Mute
8 VSS GND.
9 QS IC18 data output.
10 Q’S NC
11 Q8 DTMPD DTMF decode IC power down.
H : Power down, L : Busy
12 Q7 Not used.
13 Q6 5TC TX power control. H : RX, L : TX
14 Q5 5RC RX power control. H : TX, L : RX
15 OE OE Output enable.
16 VDC 5M +5V.
SEMICONDUCTOR DATA
VCO System : KCH31, KCH32 (TX-RX Unit IC14)
■ Circuit diagram
3 CV
2 MD
1 TA
L1 C2 C8
R2
L2
R4
D2 D3
C1
Q2 Q3
C12
D1 C13
C4 C5 R6
R3
C15
4 OUT
5 GND
R7 C9
C10
C11
6 5C
R5
R8
L4
R9 L3
Q1
R1
C17
Q1 : 2SK1824
Q2 : 2SC4226(R25)
Q3 : 2SC5008 D1 : HVC350B
D2 : HVC202A
D3 : MA2S077
C14
C16 C7 C6
C3
Shift Register 2 : BU4094BCFV (TX-RX U
nit IC19)
Pin No. Port Port name Function
1 STRB ES Strobe
2 DATA DAT Data
3 CLK CK Clock
4 Q1 AM1 Audio mute 1. H : Unmute, L : Mute
5 Q2 LOK Link complete (Programmable active H/L).
6 Q3 TA Talk around. H : Off, L : On
7 Q4 NC
8 VSS GND
9 QS NC
10 Q’S NC
11 Q8 SQ External squelch (Programmable active H/L).
12 Q7 CODE2 Option board data 2.
13 Q6 CODE1 Option board data 1.
14 Q5 OPT Option board control.
Please set option board type in the
KPG-49D. H : On, L : Off
Auxiliary signal outut. Please set key
function in the KPG-49D (Program-
mable active H/L).
15 OE OE Output enable.
16 VDC 5M +5V.