Kenwood TK 272 G Service Manual

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TK-272G 2 GENERAL / SYSTEM SET-UP INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information for the equipment and is current as of the publication date. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required. ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment information, the full part identification number should be included. This applies to all parts, components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the required component for proper identification. PERSONNEL SAFETY The following precautions are recommended for personnel safety: lDO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated. lSHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere. lThis equipment should be serviced by a qualified technician only. SERVICE This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within. SYSTEM SET-UP Merchandise received License and frequency allocated by FCC Choose the type of transceiver Transceiver programming Are you using the optional antenna?A personal computer (IBM PC or compatible), programming interface (KPG-22), and programming software (KPG-56D) are required for programming. (The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.) YES NO KRA-14 Helical antenna (Option) Delivery Are you using the speaker microphone? YES NO KMC-17 or KMC-21 Speaker microphone (Option) TX/RX 150~174 5.0WTK-272G K Frequency range (MHz) RF power Type TX/RX 136~150 5.0WTK-272G K2 Unit Model & TX-RX Unit Display Unit Frequency range Remarks destination K X57-5870-11 150~174MHz IF1 : 49.95MHz TK-272G K2 X57-5870-13X54-3250-10 136~150MHz LOC : 50.4MHz

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TK-272G 3 OPERATING FEATURES 1. Operation Features Programmable Auxiliary Functions Side 1, Side 2, ° , ¥, 2 22 2 2, and 3 33 3 3 can be programmed with the auxiliary functions listed below. ¥ Channel Down ¥ Channel Up ¥ Display Character ¥ Group Down 2 ¥ Group Up 2 ¥ Home Channel ¥ Key Lock ¥ Lamp ¥ Monitor A (Monitor UnmuteÐMomentary) ¥ Monitor B (Monitor UnmuteÐToggle) ¥ Monitor C (Carrier SquelchÐMomentary) ¥ Monitor D (Carrier SquelchÐToggle) ¥ None ¥ Operator Sel Tone 1 ¥ Redial ¥ RF Power Lo ¥ Scan ¥ Scan Del/Add ¥ Talk-Around ¥ 2-Tone Encode ¥ Trunking Group Code Select 2 1Available for K market models only. 2Available only when using Trunking function. 2. Programmable keys The functions the FPU programs to the function keys are described in the following sections. 1) Channel up/down When the key is pressed each time, the channel number to be selected is incremented/decremented and repeats if held for one second or longer. 2) Display character This key switches the LCD display between the group/ channel number and group/channel name. 3) Group up/down When the key is pressed each time, the group number to be selected is incremented/decremented and repeats if held for one second or longer. Antenna q qq q qe ee e e r rr r r t tt t t y yy y y u uu u ui ii i i o oo o o w ww w w Microphone Speaker The transceiver is shown with the optional KNB-14 battery pack. q qq q qRotary encoder Your dealer can program the encoder as either Group Up/Down (only when the trunking board is installed) or Channel Up/Down (default setting). Rotate to select a group or channel. Also rotate to adjust the squelch in Squelch Adjustment mode. w ww w wLED indicator Lights red while transmitting. Lights green while receiving. Flashes orange while receiving a Code Squelch or Selective Call code, or a 2-Tone or DTMF signal that matches the one set up in your transceiver. Flashes red when the battery power is low while transmitting. e ee e ePower switch/ Volume control Turn clockwise to switch ON the transceiver. Rotate to adjust the volume. To switch OFF the transceiver, turn counterclockwise fully. r rr r rPTT (Push-to-Talk) switch Press this switch, then speak into the microphone to call a station. t tt t tSide 1 key This is a PF (Programmable Function) key. Press it to activate its auxiliary function. y yy y ySide 2 key This is a PF (Programmable Function) key. Press it to activate its auxiliary function. u uu u u ° , ¥, 2 22 2 2, 3 33 3 3 keys These are PF (Programmable Function) keys. Press each key to activate its auxiliary function. i ii i iSP/MIC jacks Connect an optional speaker/ microphone here.o oo o oDisplay Note: The PF keys are programmed with default functions: ¥Side 1 key:Lamp ¥Side 2 key:Monitor A ¥ ° key:Scan ¥¥ key:Scan Del/Add ¥ 2 22 2 2 key:Talk Around ¥ 3 33 3 3 key:RF Power Lo

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TK-272G 6 OPERATING FEATURES 6. Option Signalling (DTMF/2 tone) Built-in DTMF decoder is available for option signalling. Built-in 2-Tone decoder is available for option signalling. It is possible to use individual call, group call, DBD (Dead Beat Disable). Note : DBD is only DTMF Preset operation is triggered when there is a match with Option Signaling. When Option Signaling matches on a Group Channel where it is set to Yes, the Option Signaling display flashes and Option Signaling is canceled. Settings after this will cause "Transpond" or "Alert" to sound. Setting the Selective Call Alert LED will cause the LED to start flashing orange. Mute or Unmute is triggered by the ID/QT/DQT/Carrier when option signaling matches (when Option Signal is deactivated by a transmission). AND/OR Option Signaling match conditions can be selected with AND/OR logic. Alert/Transpond AF Mute Open AND Triggers at match with QT/ Triggers at match with QT/ DQT/ID+DTMF(2tone);Opt DQT/ID+DTMF(2tone); Opt OR Triggers at match with Triggers only for match with DTMF(2tone);Opt QT/DQT/ID;Signaling Even if set as OR, there is no Alert/Transpond just with DTMF. Even if set as OR, AF mute cannot be canceled just by a match with DTMF. In conventional channels not set with QT/DQT, signaling is a match just by receiving the carrier. Auto Reset When Option Signaling matches on a Group channel where it is set to Yes, Option Signaling is canceled when it matches a group channel set to Yes. After Option Signaling matches, Option Signaling can automatically Reset after a specified time. Dead Beat Disable When the D.B.D (Dead Beat Disable) code matches, a preset operation is performed. When D.B.D matches on all group channels regardless of whether Option Signaling = Yes/No, then TX Inhibit or TX RX Inhibit is activated by the settings performed afterwards. D.B.D is canceled when the D.B.D. code + "#" is received. Transpond is always activated when the D.B.D code matches. Alert is not output. An Option Signaling match is not displayed. The transceiver is capable of having ID. The format is DTMF. The timing that the transceiver sends the ID is programmable. Begin of TX ID (BOT) :Begin of TX ID is sent at the beginning of transmission. End of TX ID (EOT) :End of TX ID is sent at the end of transmission. Both :Begin of TX ID is sent at the beginning of transmission and End of TX ID is sent at the end of transmission. There is also a "PTT ID" setting for each channel. 3) Battery Warning This transceiver has a battery warning feature. If low voltage is detected during transmission, the transceiver warns you by a flashing red "LED". When the voltage is detected to be even lower during transmission, the transceiver stops transmission and warns you by a flashing red "LED" and a beep. Please notice "indication" for the battery exchange, charging time by flashing red LED and beep. 4) "TOT" Pre-Alert The transceiver has a "TOT" pre-alert timer. This parameter selects the time at which the transceiver generates a "TOT" pre-alert tone before the "TOT" is expired. "TOT" will expire when the selected time passes from the TOT pre-alert tone. 5) "TOT" Re-Key Time The transceiver has a "TOT" re-key timer. This timer is the time you cannot transmit after the "TOT" is exceeded. After the "TOT" re-key time expires you can transmit again. 6) "TOT" Reset Time The transceiver has a "TOT" reset timer. This timer is the minimum wait time allowed during a transmission that will reset the "TOT" count. "TOT" reset time causes the "TOT" to continue even after the PTT is released, unless the "TOT" reset timer has expired. 7) OST (Operator Selectable Tone) The transceiver is capable of having the "OST" function and 16 tone pairs (QT/DQT) with a max 10-digit name for each tone pair. 8) Clear to Transpond The transceiver waits for an acknowledment signal until the channel free. This feature ensures the acknowledment signal is receive by another party. 9) Battery Save This is the automatic battery saver during standby mode operation. The receiver circuit is turned on and off to conserve the battery life.