Kenwood TK-270G service manual TK-260G/270G, General / System SET-UP

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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.

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.

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.

NOTE

WE CANNOT guarantee oscillator stability when using channel element manufactured by other than KENWOOD or its authorized agents.

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.

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

 

 

 

 

 

 

K

_

 

 

OP

 

 

TK-260G

_

 

IF1 : 49.95MHz

_

 

 

M

150~174MHz

OP

OP

K

_

_

LOC : 50.4MHz

OP

_

 

 

 

TK-270G

_

_

 

 

_

 

 

_

M

 

 

 

 

SYSTEM SET-UP

Merchandise received

License and frequency allocated by FCC

 

 

 

 

 

 

 

 

 

 

 

 

Frequency range (MHz)

RF power

Type

Choose the type of transceiver

 

 

 

 

 

 

 

 

 

TX/RX 150~174

5.0W

TK-260G K,M

TK-270G K,M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transceiver programming

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.)

Are you using the speaker microphone?

NO

YES

KMC-17 or KMC-21 Speaker microphone

(Option)

Delivery

2

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Contents Contents TK-260G/270GTK-260G/270G General / System SET-UPOperating Features Operation FeaturesDtmf keypad Programmable keys3 keys SP/MIC jacksIcon Description Display TK-270G onlyScan Operating TK-270G only Scan typesDetails of Features Option Signalling DTMF/2 tone For the panel Test Mode TK-270G only Operating Features / RealignmentHow to Enter Each Mode Audible user feedback tonesRealignment PC ModeFirmware Programming Mode ChecksumClone Mode FunctionChannel Setting Mode Self Programming Mode TK-270G onlySelf programming mode setting Flow ChartDelete DtmfTone ADDFunction Setting Mode Function Setting ModeYES Cttyes YES/NOTOT CttnoMemory Reset Mode Separating the chassis from the unit TK-260G Disassembly for RepairSeparating the case assembly from the chassis Receiver Frequency configurationCircuit Description PLL frequency synthesizer Transmitter System Power supplyEncode signaling Microphone amplifierControl Circuit Optional Board TerminalLCD Driver LC75823W Display Unit IC501 TK-270G only Circuit DESCRIPTION/SEMICONDUCTOR DataUPB1509GV IC301 Shift register 1BU4094BCFVIC5 Semiconductor DataMicroprocesser 30622M4102GP TX-RX Unit IC13 Shift register 2BU4094BCFVIC6TX-RX Unit Description of ComponentsDisplay Unit X54-3250-10 TK-270G Only Parts List TK-260G/270GTX-RX Unit Ceramic Trimmer CAP10P CN1 Coil R92 RK73GB1J100J VR1 Exploded View TK-260G Exploded View TK-270G TK-260G/270G PackingRepair Jig Chassis AdjustmentTest Equipment Required for Alignment Repair Jig Extention Flat cable part No E37-0851-05 Test Mode TK-270G onlyTest mode operating features Tuning mode LCD display Tuning mode Wide/Narrow indicatorPanel Tuning Mode Common Section Transmitter SectionAF Vtvm Hpfoff Ptton Dtmf BPF-WAVE Adjustment points TX-RX unit X57-587 Component side view Foil Side ViewDisplay Unit X54-3250-10 Foil Side View PC Board View TK-260G/270GDisplay Unit X54-3250-10 Component Side View PC Board View DTA114EE TK-260G/270G PC Board View TK-260G TK-270GSCHEMATIC Diagram Block Diagram KNB-15A Level DiagramKNB-14 Options KMC-17 Speaker microphone KMC-17 Parts ListKMC-21 Speaker microphone KMC-21 Parts List Specification General