Kenwood TK-980, Service Manual

Page: 17 / 62

17
TK-980/981
INSTALLATION
1-3. Data Equipment Connection
The jumpers must be set to either one for each function.
Otherwise, the radio will not work properly.
AHK/BUSY
R64 (0
Ω
) R18 (0
Ω
) Function
Yes No BUSY System busy output indicates if no
repeater channel is available in the
currently selected LTR system
when PTT is pressed, active low
: Default
No Yes AHK MIC hook input/RXD2 (com2).
ME/AM
R12 (0
Ω
) R167 (0
Ω
) Function
Yes No AM Speaker mute input, active high
: Default
No Yes ME MIC ground.
MI/TXS
R94 (0
Ω
) R24 (0
Ω
) Function
Yes No TXS Transmitter sense output, active
high : Default
No Yes MI Internal MIC input.
LOK/AM
R5 (0
Ω
) R6 (0
Ω
) Function
Yes No AM Audio mute signal input.
No Yes LOK Link complete pulse output : Default
DTC/LOK/TXS/FSW
R168 R84 R51 R13 Function
(0
Ω
) (0
Ω
) (0
Ω
) (0
Ω
)
No No No Yes LOK Link complete pulse output.
Yes No No No DTC Data control channel signal input,
Data channel : low (Default)
No No Yes No TXS Transmitter sense output,
active high
No Yes No No FSW Foot switch input, active low
R13
R51
R64
R18
R12
R167
R24
R94
R168
TX-RX unit (A/2)
Foil side view
2. Accessory Terminal (TX-RX Unit)
2-1. External Connector Accessory Terminal Method
Connector Pin Pin I/O Function
No. No. name
CN1 1 DEO O Detect signal output. (Output level :
(DO) 250mVrms; standard modulation)
2 AHK I external hook signal input.
(AH) “COM2” port must be select “AUX
HOOK/PTT” / “DATA PTT” function
in the KPG-49D.
On hook : L, Off hook : H
BUSY O System busy signal output for
trunking system. No vacant repeater
: L, Vacant repeater : H
RXD2 I Serial data input 2.
“COM2” port must be select
“REM” / “DATA” / “DATA+GPS”
function in the KPG-49D.
3 IGN (IG) I Ignition input for KCT-18.
4 DI I External modulation signal input.
5 ME – MIC earth.
AM I Audio mute signal input.
6 MI I Internal MIC input.
TXS O Signal indicating whether the
transceiver is transmitting or not.
TX : H, Another : L
7 PTT I External PTT signal input.
(PT) “COM2” port must be select
“AUX HOOK/PTT” / “DATA PTT”
function in the KPG-49D.
TX : L, Another : H
TXD2 O Serial data output 2.
“COM2” port must be select
“REM” / “DATA” / “DATA+GPS”
function in the KPG-49D.
Note : The following parts are not installed at the time of
shipping; R5,R13,R18,R24,R51,R84,R167
R5
R84
R6
TX-RX unit (A/2)
Component side view