Kenwood TK-863G Service Manual page 14

TK-863G
4. PA/HA Unit (KAP-1 : Option)
4-1. Installing the KAP-1 in the Transceiver
The Horn Alert (max. 2A drive) and Public Address func-
tions are enabled by inserting the KAP-1 W1 (3P; white/
black/red) into CN3 on the TX-RX unit (A/2), inserting W2
(3P; green) into CN7 on the TX-RX unit (A/2), and connecting
the KCT-19 (option) to CN2 and CN3 of the KAP-1.
• Installation procedure
1. Open the upper case of the transceiver.
2. Insert the two cables (
KAP-1 switch unit into the connectors on the transceiver.
3. Secure the switch unit board to the chassis with a screw
( ). The notch ( 2
3
front left side.
4. Attach the cushion on the top of the KAP-1 switch unit.
3
W1
W2
CN2
CN1
CN3
1
CN3
CN7
4-2. Modifying the Transceiver
• Horn alert
The signal from pin 4 of IC9 on the TX-RX unit (A/2) turns
Q5 and Q1 on and off and drives KAP-1 HA relay K2 to drive
the horn with a maximum of 2A.
The default output is HR1. The relay open output can be
obtained between HR1 and HR2 by removing R1 in the KAP-
1.
HR1 (Default)
HR2
14
INSTALLATION
) with connectors from the
1
) in the board must be placed at the
Cushion
(G13-1710-04)
4
3
2
1
KCT-19
Fig. 5
R1 Output form
Enable
HR1
Disable
HR1
HR2
Fig. 6 KAP-1 foil side view
• Public address
The signal from pin 13 of IC9 on the TX-RX unit (A/2)
drives PA relay K1 in the KAP-1 and switches the audio
power amplifier output between the external PA system
(through KCT-19) and internal and external speakers.
To use the PA function, R153 on the TX-RX unit (A/2)
must be removed.
Use the PA function
Do not use the PA function
KCT-19
CN2
Q19
Fig. 7
R153
Disable
Enable
TX-RX UNIT
(A/2)
ANT