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2 SYSTEM SET-UP .......................................................... 2 OPERATING FEATURES .............................................. 3 REALIGNMENT ............................................................. 8 DISASSEMBLY FOR REPAIR ..................................... 16 CIRCUIT DESCRIPTION ............................................. 17 SEMICONDUCTOR DATA .......................................... 21 DESCRIPTION OF COMPONENTS ............................ 23 PARTS LIST.................................................................24 EXPLODED VIEW ....................................................... 30 PACKING ..................................................................... 32 ADJUSTMENT ............................................................. 33 PC BOARD VIEWS DISPLAY UNIT (X54-3250-10) ............................... 41 TX-RX UNIT (X57-587X-XX) .................................. 43 SCHEMATIC DIAGRAM .............................................. 49 BLOCK DIAGRAM ....................................................... 57 LEVEL DIAGRAM ........................................................ 59 KNB-14/KNB-15A (Ni-Cd BATTERY) .......................... 60 OPTIONS ..................................................................... 61 SPECIFICATIONS ................................... BACK COVER TK-260G/270G 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: . DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated. . SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere. . This 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. NOTE WE CANNOT guarantee oscillator stability when using channel element manufactured by other than KENWOOD or its authorized agents. Unit X57-587X-XX X54-325X-XX Model & Frequency range Remarks Helical Antenna Charger Battery 16 Key destination 0-10 0-11 0-21 0-10 TK-260G K _– OP – M _– 150~174MHz IF1 : 49.95MHz _ OP OP – TK-270G K __LOC : 50.4MHz OP _ M ____ SYSTEM SET-UP Merchandise received License and frequency allocated by FCC Choose the type of transceiver Transceiver programming Delivery Are you using the speaker microphone? TX/RX 150~174 5.0W TK-260G K,M TK-270G K,M Frequency range (MHz) RF power Type 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 KMC-17 or KMC-21 Speaker microphone (Option) TK-260G/270G OPERATING FEATURES 1. Operation Features • TK-260G Channel selector Power switch/ Rotate to select a Volume control channel (1 ~ 8). Turn clockwise to switch ON the transceiver. Antenna Rotate to adjust the volume. To LED indicator switch OFF the Lights red while transceiver, turn transmitting. Lights counterclockwise green while receiving. fully. Flashes orange while receiving a 2-Tone or Microphone DTMF signal that matches the one set up in your transceiver. Speaker Flashes red when the battery power is low while transmitting. PTT (Push-to- Talk) switch Press this switch, then speak into the microphone to call a station. SP/MIC jacks Side 1 key Connect an Press to optional speaker/ activate its microphone here. programmable function. The transceiver is shown with the Side 2 key optional KNB-14 Press to battery pack. activate its programmable function. Programmable Auxiliary Functions Side 1 key and Side 2 key can each be programmed with one of the following auxiliary functions: • Monitor A (Monitor Unmute–Momentary): Press and hold the Monitor key to hear background noise. Release the key to return to normal operation. • Monitor B (Monitor Unmute–Toggle): Momentarily press the Monitor key to hear background noise. Press the key again to return to normal operation. • Monitor C (Carrier Squelch–Momentary): Press and hold the Monitor key to deactivate QT, DQT, 2-Tone, or DTMF signallin...
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