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Kenwood TM-471A User Manual

Kenwood TM-471A
46 pages
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© 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)

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Kenwood TM-471A Specifications

Operating Environment IconOperating Environment
usable temperature range–20°C~+60°C
frequency stability± 2.5ppm
grounding methodNegative ground
Power IconPower
power supply13.8V DC± 15%
current transmit (max.)13A or less
current receive (at 2W output)1.0A or less
Receiver Specifications IconReceiver Specifications
circuitryDouble conversion superheterodyne
sensitivity (12dB SINAD)Wide : 0.20µV or less
audio output2W or higher (5% distortion)
Transmitter Specifications IconTransmitter Specifications
power output high40W
power output lowApprox. 25W
maximum frequency deviationWide : ± 5kHz
Weight and Dimensions IconWeight and Dimensions
dimensions160 x 43 x 137 mm
weight1.2 kg

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