Kenwood TK-272G User Manual

VHF FM TRANSCEIVER
TK-272G
© 2000-11 PRINTED IN JAPAN
B51-8560-00(S) 790
SERVICE MANUAL
GENERAL ......................................................................2
SYSTEM SET-UP ..........................................................2
OPERATING FEATURES.............................................. 3
REALIGNMENT .............................................................7
DISASSEMBLY FOR REPAIR..................................... 15
CIRCUIT DESCRIPTION ............................................. 16
SEMICONDUCTOR DATA .......................................... 20
DESCRIPTION OF COMPONENTS............................ 22
PARTS LIST................................................................. 23
EXPLODED VIEW ....................................................... 30
PACKING ..................................................................... 31
CONTENTS
Key top (DTMF)
(K29-9043-02)
ADJUSTMENT ............................................................. 32
PC BOARD VIEWS
DISPLAY UNIT (X54-3250-10)............................... 41
TX-RX UNIT (X57-587X-XX) .................................. 43
SCHEMATIC DIAGRAM .............................................. 49
BLOCK DIAGRAM ....................................................... 53
LEVEL DIAGRAM ........................................................ 55
KNB-14/KNB-15A (Ni-Cd BATTERY) .......................... 56
OPTIONS ..................................................................... 57
SPECIFICATIONS ................................... BACK COVER
Antenna
(KRA-14:Option)
Knob (ENC)
(K29-5331-03)
Knob (VOL)
(K29-5332-03)
Cabinet assy
(A02-3568-23)
Knob (PTT)
(K29-5334-13)
Knob (Side1)
(K29-5333-13)

Kenwood TK-272G Specifications

General Specifications

frequency range	150~174MHz (K) 136~150MHz (K2)
number of channels	Max. 32
channel spacing	25kHz, 30kHz (Wide) 12.5kHz, 15kHz (Narrow)
PLL channel stepping	2.5kHz, 5kHz, 6.25kHz, 7.5kHz
operating voltage	7.5 VDC±20%
battery life with KNB-14	More than 4 hours at 5 watts (5-5-90 duty cycle)
battery life with KNB-15A	More than 8 hours at 5 watts (5-5-90 duty cycle)
operating temperature range	-30˚C to +60˚C (-22 ˚F to +140 ˚F)

Receiver Specifications

sensitivity EIA 12dB SINAD	0.25µV (Wide)/0.28µV (Narrow)
selectivity	70dB (Wide)/65dB (Narrow)
inter modulation	65dB (Wide)/60dB (Narrow)
spurious response	65dB
audio power output	500mW
frequency stability	±3.0ppm
channel frequency spread	24MHz (K), 14MHz (K2)

Transmitter Specifications

RF power output	5W/1W
spurious and harmonics	70dB
modulation	16KφF3E (Wide)/11KφF3E (Narrow)
FM noise	45dB (Wide)/43dB (Narrow)
audio distortion	Less than 5%
frequency stability	±3.0ppm
channel frequency spread	24MHz (K), 14MHz (K2)

Weight and Dimensions

dimensions with KNB-14	58 W x 135 H x 32 D mm
weight with KNB-14	400g (0.88lbs)
dimensions with KNB-15A	58 W x 135 H x 35 D mm
weight with KNB-15A	440g (0.97lbs)