CONTENTS
SERVICE MANUAL
TK-260G/270G
TK-260GTK-270G M market models are shown
SERVICE
ORDERING REPLACEMENT PARTS
PERSONNEL SAFETY
TK-260G/270G
OPERATING FEATURES
1. Operation Features
wLED indicator
ePower switch/ Volume control
2. Programmable keys
u, •, 2,3 keys
iDTMF keypad
oSP/MIC jacks
3. Display TK-270Gonly
4. Scan Operating TK-270Gonly
Icon
Description
5. Details of Features
5 Priority Channel Setting
1 Time-outtimer
3 Scan Stop Condition
6. Option Signalling DTMF/2 tone
4 Battery Warning
7 TOT Reset Time
10 Battery Save
OPERATING FEATURES / REALIGNMENT
2. How to Enter Each Mode
3-1.For the panel Tuning Mode
7. Audible user feedback tones
5-2.Connection procedure
6-2.Connection procedure
REALIGNMENT
4. Checksum
7. Clone Mode
6-4.Function
TK-260G/270G
REALIGNMENT
8.1 Self programming mode setting
8-2.Channel Setting Mode
8. Self Programming Mode TK-270Gonly
TK-260G/270G
REALIGNMENT
TK-260G/270G
No. Function Choices
8-3.Function Setting Mode
Function Setting Mode
TK-260G/270G
REALIGNMENT
REALIGNMENT
TK-260G/270G
No. Function
TK-260G/270G
8-4.Memory Reset Mode
REALIGNMENT
DISASSEMBLY FOR REPAIR
Separating the case assembly from the chassis
TK-270G
Separating the chassis from the unit • TK-260G
1. Frequency configuration
Fig. 1 Frequency configuration
CIRCUIT DESCRIPTION
2. Receiver
7Receive signaling
3. PLL frequency synthesizer
5Audio amplifier circuit
6Squelch
5. Power supply
4Encode signaling
4. Transmitter System
3 UNLOCK DETECTOR
3 Low battery warning
6. Control Circuit
7. Optional Board Terminal
1Frequency shift circuit
Pin connection diagram
Block diagram
CIRCUIT DESCRIPTION/SEMICONDUCTOR DATA
8. CONTROL SYSTEM
SEMICONDUCTOR DATA
Microprocesser : 30622M4102GP TX-RXUNIT : IC13
Shift register 1:BU4094BCFVIC5
Shift register 2:BU4094BCFVIC6
DESCRIPTION OF COMPONENTS
DISPLAY UNIT X54-3250-10 TK-270GOnly
TX-RXUNIT
TK-260G/270G
PARTS LIST
TK-260G/270G
DISPLAY UNIT X54-3250-10 TK-270Gonly
TK-260G/270G
TX-RXUNIT X57-5870-XX -10:TK-260GK,M
11:TK-270GK -21:TK-270GM
PARTS LIST
TK-260G/270G
TK-260G/270G
PARTS LIST
C173
TK-260G/270G
PARTS LIST
Ref. No
TK-260G/270G
PARTS LIST
RK73GB1J100J
TK-260G/270G
PARTS LIST
R232
EXPLODED VIEW TK-260G
TK-260G/270G
EXPLODED VIEW TK-270G
TK-260G/270G
PACKING
TK-260G/270G
ADJUSTMENT
The following parts are required for adjustment
1. Antenna connector adapter
Test Equipment Required for Alignment
Test mode operating features
Repair Jig Extention Flat cable : part No
E37-0851-05
Test Mode TK-270Gonly
H.P.O.W. .1. ON : Narrow
V.Q.T
ADJUSTMENT
TK-260G/270G
Common Section
Transmitter Section
ADJUSTMENT
TK-260G/270G
TK-260G/270G
ADJUSTMENT
F.Q.T
TK-260G/270G
ADJUSTMENT
14.DQT
ADJUSTMENT
TK-260G/270G
Fig. 2 Adjustment points
Foil Side View
ADJUSTMENT
VR1 : Frequency adjustment
DISPLAY UNIT X54-3250-10Component Side View
PC BOARD VIEW TK-260G/270G
DISPLAY UNIT X54-3250-10Foil Side View
TX RX UNIT X57-5870-XXComponent Side View
0-10:TK260GK,M, 0-11:TK-270GK, 0-21:TK-270GM
TK-260G/270G
PC BOARD VIEW
TX RX UNIT X57-5870-XXFoil Side View
PC BOARD VIEW TK-260G/270G
0-10:TK260GK,M, 0-11:TK-270GK, 0-21:TK-270GM
TX-RXUNIT
0664
TK-260G/270G PC BOARD VIEW
0-10:TK260GK,M, 0-11:TK-270GK, 0-21:TK-270GM
SCHEMATIC DIAGRAM
TK-260G
TK-270G SCHEMATIC DIAGRAM
BLOCK DIAGRAM
TK-260G/270G TK-260G/270G
LEVEL DIAGRAM
KNB-14/KNB-15A Ni-CdBATTERY
CIRCUIT DIAGRAM
SPECIFICATIONS
KMC-17Parts List
KMC-21Parts List
OPTIONS
KMC-17Speaker microphone
SPECIFICATION
General
TK-260G/270G
KENWOOD CORPORATION