Kenwood TK-390 Service Manual

Antenna
(KRA-15 : Option)
Cabinet assy
(A02-2140-63)
Knob assy (SEL)
(K29-5282-04)
Knob assy (VOL)
(K29-5283-04)
Panel assy
(A62-0537-53)
Knob assy
(Side key)
(K29-5441-04)
Key top (10key)
(K29-5193-23)
© 2001-3 PRINTED IN JAPAN
B51-8424-20
(
N
)
1023
UHF FM TRANSCEIVER
TK-390
SERVICE MANUAL
Photo is TK-390 K4 type.
Does not come with antenna.
Antenna is available as an option.
CONTENTS
GENERAL ................................................................. 2
SYSTEM SET-UP ..................................................... 2
OPERATING FEATURES ......................................... 3
REALIGNMENT...................................................... 11
CIRCUIT DESCRIPTION......................................... 17
SEMICONDUCTOR DATA ..................................... 25
DESCRIPTION OF COMPONENTS ....................... 26
PARTS LIST ............................................................ 28
EXPLODED VIEW .................................................. 36
PACKING ................................................................ 37
DISASSEMBLY FOR REPAIR ................................ 38
ADJUSTMENT ....................................................... 39
PC BOARD VIEWS
FINAL UNIT (X45-3590-10) ............................... 50
CONTROL UNIT (X53-3930-XX)....................... 51
TX-RX UNIT (X57-5400-XX) ............................. 55
SCHEMATIC DIAGRAM ........................................ 61
BLOCK DIAGRAM.................................................. 67
LEVEL DIAGRAM ................................................... 69
TERMINAL FUNCTION ......................................... 70
KNB-17A (Ni-Cd BATTERY) .................................. 71
KMC-25/26 (SPEAKER MICROPHONE) ............... 72
KSC-19 (CHARGER) ............................................... 73
KSC-20 (RAPID CHARGER) ................................... 73
KPG-36 (PROGRAMMING INTERFACE CABLE) ..... 73
KRA-15 (ANTENNA) .............................................. 73
SPECIFICATIONS............................... BACK COVER
CAUTION
When using an external power connector,
please use with maximum final module protec-
tion of 10V
REVISED II

Kenwood TK-390 Specifications

General Specifications

frequency range	450 to 490 MHz
number of channels	160 channels
channel spacing	Wide : 25 kHz, Narrow : 12.5 kHz
battery voltage	7.5 V DC ± 20%
battery life	10 hours at 4W (5-5-90 duty cycle)
temperature range	–30°C to +60°C (–22°F to +140°F)

Receiver Specifications

sensitivity EIA 12dB SINAD	0.25 µV
sensitivity 20dB quieting	0.35 µV
selectivity	Wide : –73 dB, Narrow : –68 dB
intermodulation	Wide : –73 dB, Narrow : –65 dB
spurious and image rejection	–73 dB
audio power output	500 mW at less than 3% distortion
frequency stability	± 0.0002% from –30°C to +60°C
channel frequency spread	40 MHz

Transmitter Specifications

RF power output	Hi : 4W, Low : 1W
spurious and harmonics	–70 dB
type of emission	Wide : 16K0F3E, Narrow : 11K0F3E
FM noise	Wide : –45 dB, Narrow : –40 dB
audio distortion	Less than 3.0% at 1000 Hz
frequency stability	± 0.0002% from –30°C to +60°C
channel frequency spread	40 MHz

Weight and Dimensions

dimensions	155 mm H x 58 mm W x 38 mm D
weight	1.25 lbs (565 g)
dimensions with keypad model	155 mm H x 58 mm W x 39.5 mm D