Kenwood Service Manuals for TK-260 and TK-270 Models

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VHF FM TRANSCEIVER

TK-260G/270G

SERVICE MANUAL

© 1999-9 PRINTED IN JAPAN B51-8493-00(S) 1425

Antenna

(T90-0679-05):M

Knob (CHANNEL SELECTOR)	Knob (ENC)
(K29-5341-03)	(K29-5331-03)

					Knob (VOL)
					(K29-5332-03)
								Cabinet assy
								(A02-2391-23)
Knob (PTT)								Knob (PTT)


(K29-5334-13)								(K29-5334-13)
Knob (MONI)								Knob (MONI)
Knob (MONI)								Knob (MONI)
(K29-5333-13)								(K29-5333-13)

Knob (VOL) (K29-5332-03)

Cabinet assy (A02-2385-23)

Key top (DTMF)

(K29-5330-02)

TK-260GTK-270G M market models are shown.

CONTENTS

GENERAL	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

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Contents TK-260G/270G ContentsGeneral / System SET-UP TK-260G/270GOperation Features Operating Features3 keys Programmable keysDtmf keypad SP/MIC jacksScan Operating TK-270G only Display TK-270G onlyIcon Description Scan typesDetails of Features Option Signalling DTMF/2 tone How to Enter Each Mode Operating Features / RealignmentFor the panel Test Mode TK-270G only Audible user feedback tonesFirmware Programming Mode PC ModeRealignment ChecksumFunction Clone ModeSelf programming mode setting Self Programming Mode TK-270G onlyChannel Setting Mode Flow ChartTone DtmfDelete ADDFunction Setting Mode Function Setting ModeTOT YES/NOYES Cttyes CttnoMemory Reset Mode Separating the case assembly from the chassis Disassembly for RepairSeparating the chassis from the unit TK-260G Circuit Description Frequency configurationReceiver PLL frequency synthesizer Encode signaling Power supplyTransmitter System Microphone amplifierOptional Board Terminal Control CircuitUPB1509GV IC301 Circuit DESCRIPTION/SEMICONDUCTOR DataLCD Driver LC75823W Display Unit IC501 TK-270G only Microprocesser 30622M4102GP TX-RX Unit IC13 Semiconductor DataShift register 1BU4094BCFVIC5 Shift register 2BU4094BCFVIC6Display Unit X54-3250-10 TK-270G Only Description of ComponentsTX-RX Unit TK-260G/270G Parts ListTX-RX Unit Ceramic Trimmer CAP10P CN1 Coil R92 RK73GB1J100J VR1 Exploded View TK-260G Exploded View TK-270G Packing TK-260G/270GTest Equipment Required for Alignment AdjustmentRepair Jig Chassis Test mode operating features Test Mode TK-270G onlyRepair Jig Extention Flat cable part No E37-0851-05 Panel Tuning Mode LCD display Tuning mode Wide/Narrow indicatorTuning mode Transmitter Section Common SectionAF Vtvm Hpfoff Ptton Dtmf BPF-WAVE Foil Side View Adjustment points TX-RX unit X57-587 Component side viewDisplay Unit X54-3250-10 Component Side View PC Board View TK-260G/270GDisplay Unit X54-3250-10 Foil Side View PC Board View DTA114EE TK-260G/270G PC Board View TK-260G TK-270GSCHEMATIC Diagram Block Diagram KNB-14 Level DiagramKNB-15A KMC-21 Speaker microphone KMC-21 Parts List KMC-17 Speaker microphone KMC-17 Parts ListOptions General Specification