Kenwood TM-V7A Service Manual

144/430MHz FM DUAL BANDER
TM-V7A/E
SERVICE MANUAL
KENWOOD
© 1996-11 PRINTED IN JAPAN
B51-8348-00 (B) 1100
Microphone assy
(T91-0568-05):K, M3
Metallic cabinet (Upper)
(A01-2122-13)
Knob (PM)
(K27-3168-23)
Knob (MNU)
Knob (VFO) (K27-3169-33)
(K27-3166-23)
Knob (MR)
(K27-3167-23)
Cover (DIN 6P)
(FO7-1428-23)
Sub panel
(A22-0798-11)
Knob (MAIN)
(K29-5133-03)
Panel assy
(A62-0492-33)
Knob (VOL)
(K29-5134-03)
Knob (SQL)
(K29-5135-03)
Button knob (MAIN, PUSH)
(K27-3172-03)
Photo is K Type
CONTENTS
CIRCUIT DESCRIPTION. ........csscssssssssrsesssere 2 PC BOARD VIEW
SEMICONDUCTOR DATA. ......ccccsssssssressscees 19 LCD ASSY (B38-0772-15) .......csccccccsccee 52
DESCRIPTION OF COMPONENTS .............. 23 TX-RX UNIT (X57-52XX-XX) (A/3).......... 53
TERMINAL FUNCTION. .....cccccscsssssneeseeeeee we 26 TX-RX UNIT (X57-52XX-XX) (B/3)........-. 57
PARTS LIST..........cccscceeeeees sestssressseseeerennterens 29 TX-RX UNIT (X57-52XX-XX) (C/3).......... 59
EXPLODED VIEW............. seeessnnnesnesesteneeeeenens 40 SCHEMATIC DIAGRAM...............cccsscrerrenes 61
PACKING ......c:sssscsssssessenssesseees sessesenenssrnseenees 4D BLOCK DIAGRAM ....... sesensananseeesecensens wees 69
ADJUSTMENT ............. euepenseoscaterseseensecnecsoess 42 WIRING DIAGRAM ..........ccccscccsscrsstrcnsccrernee 71
LEVEL DIAGRAM ...................:::00000000+ see 72
OPTIONS (DFK-3C/DFK-4C/DFK-7C) ........ 73
SPECIFICATIONG.................... Back cover

Kenwood TM-V7A Specifications

General Specifications

VHF frequency range	144~148MHz
UHF frequency range	438~450MHz (U.S.A/Canada)
Antenna impedance	50Ω
Usable temperature range	-20°C to +60°C (-4°F to +140°F)
Power supply	13.8V DC ±15% (11.7~15.8V)
Grounding method	Negative-ground
Frequency stability	±3ppm (-10°C to +50°C)
Dimensions (W x H x D)	140 x 54.5 x 205.5 mm

Transmitter Specifications

High power output	50W (VHF) / 35W (UHF)
Mid power output	Approx. 10W
Low power output	Approx. 5W
Spurious emissions	-60dB or less
Maximum frequency deviation	±5kHz
Audio distortion	3% or less (at 60% modulation)
Microphone impedance	600Ω

Receiver Specifications

Circuitry	Double conversion
Intermediate frequency (1st / 2nd)	38.85MHz / 450kHz and 45.05MHz / 455kHz
Sensitivity (VHF or UHF band)	0.16μV or less (12dB SINAD)
Sensitivity (Sub VHF or UHF band)	0.25μV or less
Selectivity (-6dB)	12kHz or more
Selectivity (-60dB)	28kHz or less
Squelch sensitivity	0.1μV or less
Audio output	2W or higher (8 ohms, 5% distortion)
Audio output impedance	8Ω

Weight and Dimensions

Weight	1.2 kg (2.6 lb)
Dimensions (W x H x D)	5.51" x 2.15" x 8.09"