Kenwood TK-2170 Service Manual

© 2005-3 PRINTED IN JAPAN
B51-8720-00
(
N
)
1192
VHF FM TRANSCEIVER
TK-2170
SERVICE MANUAL
GENERAL ................................................... 2
SYSTEM SET-UP ....................................... 2
REALIGNMENT .......................................... 3
DISASSEMBLY FOR REPAIR .................. 21
CIRCUIT DESCRIPTION ........................... 23
SEMICONDUCTOR DATA ....................... 28
COMPONENTS DESCRIPTION ............... 29
PARTS LIST .............................................. 31
EXPLODED VIEW..................................... 39
PACKING .................................................. 40
CONTENTS
TK-2170 K2
Does not come with antenna.
Antenna is available as an option.
Badge
(B43-1178-04)
Knob (Selector)
(K29-9340-03)
Knob (Volume)
(K29-9278-13)
Knob (PTT)
(K29-9339-03)
Key top (Side)
(K29-9341-03)
Plastic cabinet assy
(A02-3891-13)
Packing
(G53-1652-11)
Packing
(G53-1651-01)
Plastic cabinet assy
(A02-3890-03)
This product uses Lead Free solder.
ADJUSTMENT ......................................... 41
TERMINAL FUNCTION ............................ 49
PC BOARD
TX-RX UNIT (X57-7000-XX) (A/4) .......... 50
TX-RX UNIT (X57-7000-XX) (B,C,D/4).... 52
SCHEMATIC DIAGRAM........................... 56
BLOCK DIAGRAM .................................... 64
LEVEL DIAGRAM ..................................... 66
KSC-30 (RAPID CHARGER) ..................... 67
SPECIFICATIONS .................. BACK COVER
TK-2170 K

Kenwood TK-2170 Specifications

General Specifications

frequency range	136~174MHz
number of channels	Max. 128 per radio
channel spacing	Wide: 25, 30kHz; Narrow: 12.5, 15kHz
battery voltage	7.5V DC ± 20%
antenna impedance	50Ω
channel frequency spread	38MHz

Battery

battery life with KNB-24L (1400mAh)	9 hours
battery life with KNB-25A (1200mAh)	8 hours
battery life with KNB-26N (2000mAh)	12 hours
battery life with KNB-35L (1950mAh)	11 hours

Operating Environment

operating temperature range	–22°F~+140°F (–30°C~+60°C)
frequency stability	± 0.00025% (–22°F~+140°F)

Receiver

sensitivity (12dB SINAD) Wide	0.25µV
sensitivity (12dB SINAD) Narrow	0.28µV
selectivity Wide	70dB
selectivity Narrow	65dB
intermodulation distortion Wide	65dB
intermodulation distortion Narrow	60dB
spurious response	65dB
audio output (8Ω impedance)	500mW with less than 5% distortion

Transmitter

RF power output HI	5W
RF power output LO	1W
spurious response	70dB
modulation Wide	16K0F3E
modulation Narrow	11K0F3E
FM hum & noise Wide	45dB
FM hum & noise Narrow	43dB
audio distortion W/N	Less than 5%

Weight and Dimensions

weight with battery, antenna, and beltclip	12.0 oz. (340 g)
dimensions with KNB-24L or 35L battery	56 x 109 x 31.7 mm
dimensions with KNB-25A or 26N battery	56 x 109 x 37.9 mm