Kenwood TK-840/940/941 Interface
Contents
1. 0034 231 0035 231 0036 231 0054 312 0035 800 1115 Qty O a a a nO niu2. Kenwood TK 840 940 941 Interface The following items are included in the Kenwood TK 840 940 941 interface kit 1 TK 840 940 941 interface cable assembly 2 3 short pieces of wire 3 3 short pieces of heat shrink tubing 4 Instruction sheet The following steps outline the procedure for interfacing the Kenwood TK 840 940 941 radio to the Traklt 20 The Kenwood TK 840 940 941 radio can operate in either trunking or conventional mode but the interface will depend upon the mode selected as detailed in the following steps 1 The enclosed interface cable needs to have one pin installed in the appropriate location For a Kenwood TK 840 940 941 install the loose pin brown wire into pin number 10 on the molex end of the interface cable For a Kenwood TK 880 980 981 install the loose pin brown wire into pin number 2 on the molex end of the interface cable 2 For a Kenwood TK 840 940 941 the resistor inside of the hood on the DB15 connector needs to be removed Disassemble the hood cut the resistor out and reassemble the hood 3 Set the Traklt 20 up for a bench test and use the AVL Installer program to set the following operating constants in the installer table to the indicated value Trunking Transmit indicator active Low Receive indicator active High PTT output active Low Enable mic mute gate on transmit Yes External output active Low External output mode Speaker mute Conventional Transmit indicator active High R
3. eceive indicator active High PTT output active Low Enable mic mute gate on transmit Yes Enable Tx indicator as event 2 No External output active Low External output mode Speaker mute Kenwood TK 840 940 941 Interface cont 2 Configure the following jumpers as indicated Trunking Conventional JP1 Installed JP1 Installed JP4 B C JP4 AB 3 Install the KCT 19 accessory connection cable into the TK 840 940 941 radio by following the instructions in the TK 840 940 941 service manual The cable connectors should be connected to the TX RX unit as follows Cable TX RX unit CN4 No connection CN1 CN2 mo Ow 4 Place the speaker and speaker holder off to the side and remove the shield cover located beneath the speaker 5 Locate capacitor C93 and solder a piece of wire to the side of C93 that is connected to Q20 as shown in the following diagram 6 Trunking only Locate capacitor C92 and solder a piece of wire to the side of C92 that is connected to the hole labeled AC as shown in the following diagram Conventional only Locate capacitor C75 and solder a piece of wire to the side of C75 that is connected to pin 7 of IC9 as shown in the following diagram Kenwood TK 840 940 941 Interface cont Connect wire here TOP VIEW OF CONVENTIONAL 675 KENWOOD RADIO C93 hey cil wire here Connect wire here TRUNKING Nie SEE DETAIL 1 DETAIL 1 7 Cut the brown wire going to pin 1 of connecto
4. ous step Move the heat shrink tubing into place and shrink it Replace the speaker holder speaker and the radio covers Connect the DB 15 end of the TK 840 940 941 interface cable to the DB 15 connector on the back of the Traklt 20 Connect the Molex plug end of the TK 840 940 941 interface cable to the KCT 19 cable Check the Traklt 20 s audio levels by performing the alignment procedure described in the Traklt 20 manual When programming the TK 840 940 941 radio be sure to set Access logic sig in the Feature Option screen to continuous if the radio is being used in trunking mode This will allow the Traklt 20 to detect when the TK 840 940 941 radio is transmitting If the radio is being used in conventional mode set Off hook decode in the Feature Option screen to enabled This will prevent the Traklt 20 from receiving data transmissions that are being sent to mobiles with a different ID Also for either mode if there will not be any voice transmissions set Minimum volume to O in the Feature Option screen Kenwood TK 840 940 941 Interface cont TK 840 940 941 Interface Cable KENWOOD TK 840 940 941 INTERFACE CABLE KIT Item ONoOoaRWD 800 2080 Description HEAT SHRINK TUBE 3 8 SCREW CLIP KIT MOLEX PIN MALE CONN DB15 MALE COVER DB15 CONN 15 POS MOLEX 3 3K RESISTOR 10 COND CABLE Part No 199 6099 231 0014 231
5. r B the larger 3 position connector on the KCT 19 cable Place a piece of heat shrink tubing on this wire and solder this wire to the wire that was soldered to C93 8 Trunking only Cut the gray wire going to pin 8 of connector D the 8 position connector on the KCT 19 cable Place a piece of heat shrink tubing on this wire and solder this wire to the wire that was soldered to C92 Conventional only Cut the brown wire going to pin 1 of connector D the 8 position connector on the KCT 19 cable Place a piece of heat shrink tubing on this wire and solder this wire to the wire that was soldered to C75 9 Move the heat shrink tubing into place and shrink it 10 Replace the shield cover making sure the wires pass through slots in the cover without being pinched 11 Conventional only On the bottom side of the radio locate transistor Q12 and solder a piece of wire to Q12 as indicated in the following diagram Pass this wire through a hole in the PC board to the top side of the radio Kenwood TK 840 940 941 Interface cont 12 18 14 15 16 NOTE BOTTOM VIEW OF KENWOOD RADIO O SEE DETAIL 2 Connect wire here CONVENTIONAL DETAIL 2 E Conventional only Cut the white wire going to pin 1 of connector E the smaller 3 position connector on the KCT 19 cable Place a piece of heat shrink tubing on this wire and solder this wire to the wire that was soldered to Q12 in the previ
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