®
A
product
of
TRIO-KENWOOD
CORPORATION
17-5,
2-chome,
Shibuya,
Shibuya-ku,
Tokyo
150,
Japan
TRIO-KENWOOO
COMMUNICATIONS,
INC.
1111.
West
Walnut
Street,
Compton,
Califorma,
90220
TRIO-KENWOOO
COMMUNICATIONS,
GmbH
0-6374
Steinbach
TS.
Industriestrasse
8A.
West
Germany
S
:
TRIO-KENWOOO(AUSTRALIAIPT
Y.
LTD.
FRVI
CE
A
N
1
A
30
Whiting
Street.
Artarmon.
Sydney
NSW.
Australia
2064
«
ode
-
VHF
FM
TRANSCEIVER
USE
THIS
SERVICE
MANUAL
TOGETHER
WITH
THAT
OF
TR-7800.
Key
one"
M,
aa
pla
EO
a
atin
Fe
ranisceivers
TR+7aBo
CONTENTS
BLOCK
DIAGRAM
.........
ccc
ccccece
cette
eee
eee
eeaeneee
nen
eenens
2
PC
BOARD
VIEW
FINAL
UNIT
(X45-1180-10)
........cc
ccc
ceeeeeeeeeeee
teres
2
PARTS
LIST
00...
eccecceeeceeseseeccuusssaeseeuecesueseeneseaaes
3
SEMICONDUCTOR
DATA
............cccccccccccsececseeeceseseeeeees
4
ADJUSTMENTS...
ccccccccccecseeeseesssascsaseeusseneesanenees
5
SCHEMATIC
ABBREVIATION.
............cccceccecneceseeeneeaeenes
6
SCHEMATIC
DIAGRAM
(K)(M)
........
eccetetttenereen
7
SCHEMATIC
DIAGRAM
(W)(T)
.............06.
BACK
COVER
SPECIFICATIONS
[General]
Frequency
tolerance...............66
Less
than
+20
x
10°
a
Semiconductors
...........0..c0ceeeees
MPU
1
(—20°C~
+50°C)
|
ICs
18
(W)(T),
19
(K)(M)
Spurious
radiation
.................06.
Hi
Less
than
—
60
dB
Transistors
58
(W)(T),
60
(K)(M)
LOW
Less
than
—
53
dB
FETs
9
Maximum
frequency
Diodes
79
(K)(M)(T),
78
(W)
deviation
(FM)............0:ccee
+5
kHz
Frequency
range.............ccseeee
ees
144.000
to
145.995
MHz
(W)(T)
RPT.
Tone
burst
frequency.........
1,750
Hz
144.000
to
148.995
MHz
(K)(M)
Microphone
......
(ev
eben
eeeeeeenenenraes
Dynamic
microphone
with
PTT
switch,
Frequency
synthesizer...............
Digital
control,
phase
locked
VCO
5002
Antennéimpedance..
50
ohms
[Receiver
Section)
PODANCE
«oe
eeeeeeeerees
m
4759
CIPCUITIY......
cece
eee
e
ne ee
ene
ee
eee
re
tees
Double
conversion
superheterodyne
Power
requirement
Treereeeeeeeseeres
13.8V
DC
+15%
Intermediate
frequency
.............
istIF
10.695
MHz
GrOUNGING
........
cece
ce
cee
eee
eens
ences
Negative
,
ondIF
455
kHz
*
Operating
temperature
..............
7
20°C
to
+
50°C
; ;
Receiver
sensitivity
...............6668
Better
than
0.5
uV
for
30 dB
S/N
Current
drain...
eee
eee
0.4A
in
receive
mode
with
no
input
Better
than
0.2
nV
for
12
dB
SINAD
signal
9A
in
Hi
transmit
mode
(Approx.)
Receiver
selectivity
..............060
More
than
12
kHz
(—6
dB)
nes
than
sm
or
memory
pack
up
Less
than
24
kHz
(—60
dB)
rom
an
external
power
supply
Spurious
response
...............0006.
Better
than
60 dB
through
the
BACK
UP
terminal)
Squelch
sensitivity
...............0006.
0.16
uV
(threshold)
|
|
Less
than
2
mA
for
memory
back
up
Auto
scan
stop
level.............0008.
Less
than
0.2
nV
(threshold)
.
.
(from
battery)
WY
Audio
OUtPUt.............c
cece
cece
ee
eens
More
than
2.0
watts
across
8
ohm
DiIMENSIONS.............0ccccc
eee eee
eens
175
mm
(6-7/8")
wide
load
(10%
dist.)
64
mm
(2-1/2")
high
220
mm
(8-5/8")
deep
(projections
excluded)
WeIGHt
.......ccccceeeeeeceeeeeeeeeene
eee
2.2
kg
(4.84
Ibs)
(approx.)
[Transmitter
Section]
RF
output
power
(at
13.8V
DC,
502
load)
.....
Leese
HI
40
Watts
min.
LOW
1
to
15
watts
approx.
(According
to
FREQ.)
Modulation
..........0cccccccceeeeee
eee
Variable
reactance
direct
shift
Note:
Circuit
and
ratings
are
subject
to
change
without
notice
due
to
developments
in
technology.
©
1981-4
PRINTED
IN
JAPAN
B51-0936-00
(K)(M)(W)(T)
1000
@