Kenwood TK-880 Service Manual page 21

TK-880
1-3. Data Equipment Connection
The jumpers must be set to either one for each function.
Otherwise, the radio will not work properly.
ME/AM
R12 (0Ω) R167 (0Ω)
Yes No AM
No Yes ME
MI/TXS
R94 (0Ω) R24 (0Ω)
Yes No TXS
No Yes MI
LOK/AM
R5 (0Ω) R6 (0Ω)
Yes No AM
No Yes LOK
DTC/LOK/TXS/FSW
R168 R84 R51 R13
(0Ω) (0Ω) (0Ω) (0Ω)
No No No Yes LOK
Yes No No No
No No Yes No
No Yes No No
TX-RX unit (A/2)
Foil side view
R84
TX-RX unit (A/2)
Component side view
Note : The following parts are not installed at the time of
shipping; R5,R13,R24,R51,R84,R167
20
INSTALLATION
Function / Default
Default
Function / Default
Default
Function / Default
Default
Function / Default
DTC Default
TXS
FSW
R13
R6
R5
2. Accessory Terminal (TX-RX Unit)
2-1. External Connector Accessory Terminal Method
Connector Pin Pin I/O
No. No. name
CN1 1 DEO O Detect signal output. (Output level :
250mVrms; standard modulation)
2 AHK I External hook signal input.
On hook : L, Off hook : H
3 IGN I Ignition sense input.
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
7 PTT I External PTT signal input.
TX : L
8 SQ O Squelch signal output. Signal logic
type can select "Carrier operate relay"
or "Tone operate relay". Active logic
level or type can select in the KPG-60D.
CN2 1 AM I Audio mute signal input.
LOK O TX logic signal output. Active logic
level is low. Active type can be
selectable in the KPG-60D.
2 MM I MIC mute input.
3 DTC I Data control channel signal input.
Data channel : L, Normal channel : H
TXS O Signal indicating whether the trans-
ceiver is transmitting or not.
TX : H
FSW I Foot switch signal input.
Foot sw on : L, Foot sw off : H
LOK O TX logic signal output. Active logic
level is low. Active type can be
selectable in the KPG-60D.
CN3 1 HOR O Horn alert signal output. Signal
output for horn relay drive (open
collector). L level during horn drive :
Max. sink current 100mA.
L level when AUX A is on.
2 E – Earth.
3 SB O Power output after power switch
(DC 13.2V± 15%, 0.75A max.).
CN4 1 LOK O TX logic signal output. Active logic
level is low. Active type can be
selectable in the KPG-60D.
Function