Kenwood TM-V7A Service Manual

TM-V7A/E
CIRCUIT DESCRIPTION
@1C503
SW No. SW name Function SW No. SW name Function
0 Not used (Always set to OFF) 12 __| Not used (Always set to OFF)
1 Not used (Always set to OFF)|. 13__| Not used (Always set to OFF)
2 | Controls the DTMF monitor | °L" : OFF 14 _| Not used (Always set to OFF)
sound (430) “H" : During monitor output 15 | During BEEP output "LY": MUTE
3 Controls the DTMF monitor | “L".: OFF AF MUTE (144) "H" : OFF
; sound (144) - “H" : During monitor output 16 | External speaker output "L" : OFF
4 Not used (Always set to OFF) control (430) “H" : Output
5 Not used (Always set to OFF) 17 | internal speaker output “L" : OFF
6 Controls the BEEP monitor | "L" : OFF control (430) “H" : Output
sound (430) "H" : During BEEP outout 18 | Not used (Always set to OFF)
7 Controls the BEEP monitor | "L": OFF 19 | Not used (Always set to OFF)
sound (144) "H" : During BEEP output 20 | External speaker output "L" : OFF
8 Not used (Always set to OFF) control (144) "H" : Output
9 Not used (Always set to OFF) 21 | internal speaker output "L" : OFF
10 } During BEEP output "L": MUTE contro! (144) “H" : Output
AF MUTE (430) "H" : OFF 22 __ | Not used (Always set to OFF)
11 Not used (Always set to OFF) 23 __; Not used (Always set to OFF)
Table6
. cm DTMF output
‘
7
a
‘7
ore
iy,
KH
(fo
Al
Microprocessor
ANO1
« a ra ¢ ~ =” aa 4 q oe a
fC) 1 2
_ ~ rm BEEP output
‘ oy mea a / oH ae BD Microprocessor P32
4 a? 4 ee ¢ a 7 « ~~?
4 5 6
. e . me 430M AF
aoe PO PO So a Detection output
y ! ! y } !
“y-’ S-7 ye ~" >-’
8 9 10 W
. | 144M AF
So 4 re 7 Porn 7 ered Ar Detection output
U i I ?
4 su? r' Se é 4 ~~ ¢ q Aan a
12 13 14 15
4 Oh ‘7 ow 7 a 7 oe R5
i i i ?
q ~~ 7 4 ~~ a ¢ ~~ 7 4 oe 4
16 17 18 19
17 8
o> = = = j R L
‘f, aK if, ee ‘7 a ‘7 ee R6 FRO °
7 / 7 7
20 24 t 22 T 23 1C504
ELE
T T [Jes for VOL
23IRIN- LIN
AOO AO! r ]
Fig.10 Cross point switch(AF system) (IC503)
11

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"