Kenwood TM-471A User Manual

© 2003-10 PRINTED IN JAPAN
B51-8664-00
(
N
)
179
UHF FM TRANSCEIVER
TM-471A
SERVICE MANUAL
CIRCUIT DESCRIPTION ............................ 2
SEMICONDUCTOR DATA ........................ 8
COMPONENTS DESCRIPTION ................ 9
PARTS LIST ............................................. 10
EXPLODED VIEW.................................... 17
PACKING ................................................. 18
RESETTING THE TRANSCEIVER ........... 19
ADJUSTMENT ........................................ 20
TERMINAL FUNCTION ........................... 27
PC BOARD
DISPLAY UNIT (X54-3450-10) ............ 28
TX-RX UNIT (X57-686X-XX)............... 30
SCHEMATIC DIAGRAM.......................... 34
BLOCK DIAGRAM ................................... 38
LEVEL DIAGRAM .................................... 40
SPECIFICATION ................... BACK COVER
CONTENTS
Microphone
(T91-0641-05)
Cabinet
(A01-2193-01)
Panel assy
(A62-1102-03)
Knob (Encoder)
(K29-9293-03)
Key top
(K29-9291-01)
Knob (Volume)
(K29-9292-03)

Kenwood TM-471A Specifications

Operating Environment

usable temperature range	–20°C~+60°C
frequency stability	± 2.5ppm
grounding method	Negative ground

Power

power supply	13.8V DC± 15%
current transmit (max.)	13A or less
current receive (at 2W output)	1.0A or less

Receiver Specifications

circuitry	Double conversion superheterodyne
sensitivity (12dB SINAD)	Wide : 0.20µV or less
audio output	2W or higher (5% distortion)

Transmitter Specifications

power output high	40W
power output low	Approx. 25W
maximum frequency deviation	Wide : ± 5kHz

Weight and Dimensions

dimensions	160 x 43 x 137 mm
weight	1.2 kg