Uniden JACKSON User manual

Service Manual
CB TRANSCEIVER
Model JACKSON
UT-547C/D
uniden®
CORPORATION

I
TABLE OF CONTENTS
A. SPECIFICATIONS
B. INSTALLATION
c. GENERAL INFORMATION
D. OPERATING CONTROLS
,.
E.
ALIGNMENT PROCEDURES
.
F.
FREQUENCIES
) G.
BLOCK DIAGRAM
H.
SCHEMATIC DIAGRAMS/WIRING DIAGRAM/PC BOARD
1.
El2-2108
: SCHEMATIC DIAGRAM
2.
El2-2108
.
REVISED
.
3.
E22-4674 .
MAIN PCB PARTS ASSEMBLY TOP VIEW
.
4.
E32-2212 : . WIRING DIAGRAM
I.
BILL OF MATERIAL : 25 P.S
}

)
.)
A. SPECIFICATIONS
1. GENERAL
2.
Channel and Frequency Range
Crystals
Microphone
Speaker
Antenna Connector
Jacks & Connectors
Controls
Meter
Illumination
Size
Weight
Accessories
MEASUREMENT CONDITIONS
a)
Power Source
b) Antenna Impedance
c) Test Temperature
d) AM Modulation Frequency
e)
FM Modulation Frequency
:f)
SSB Modulation Frequency,
Tone
g)
Mean
Signal Input Level
h)
Re:ference AM
Modulation
Percentage
Two
226 A Band 26.065 - 26.505 MHz
B Band 26~515 -26.955.MHz
3
C Band 26.965
D Band 27.415
E Band 27.865
27.405 MHz
27.855 MHz
28.315 MHz
600 ohms, Dynamic Type
8 ohms, 3 W
MType
Mic 4P
EXT. SP
PA. SP
-3.~
-3.~
DC Power -3P
Channel Selector, Mode Selector
FM-All-USB-LSB, Mic Gain, ON/OFF Power
Switch & Volume, ON/OFF PA Switch &
Squelch, RF Gain, Coarse, Fine,
Band SelectOr A-B-C-D-E, Noise Blanker/
ANL Switch, Roger Beep.Switch, S/RF-Mod
Switch and +10 kHz -Normal Switch
RF Output Power, Signal Strength and
Mo~µl~tio~
: Chanriel Number Indication (LED)
RX, TX Indication (LED), Meter Lamp
7.784"(W) X 2.36"(H) X 11.22"(D)
5 Pounds (2.2 kgs)
DC Power Cable with Built-in Fuse,
Microphone and Microphone Hanger
: 13.8 V (DC)
50 ohms
25 ~
1 kHz
1 kHz
500 Hz $ 2.400 Hz
1.000 uV
1 kHz 30%
!

)
)
i) Reference FM Deviation
j) Reference Audio Output Power
: 1.5. kHz
0.5 w
1 kHz k) Audio Frequency
1) Audio Output Load 8 ohms Resistive
3. TRANSMITTER UNIT
a) Frequency Tolerance AM Hz
at 25 ~ (5 Minutes after Switch on) SSB Hz
FM Hz
b) Carrier Power
c) PEP Power, Two Tone, SSB
d) Spurious & Harmonic Emission
e) Carrier Suppression
f) Unwanted Sideband
Suppression
(at·2.500 Hz 4 Wpep l6 dB Single
toneF · ·
g) Battery Drain
at no Modulation
h) Battery Drain
Am : MAX Modulation
SSB: MAX Wpep, Two Tone
FM : MAX Modulation
i) Modulation Frequ~ncy Response
(1 kHz, OdB reference)
Lower at 450 Hz
Lower at 2.5 kHz
j) Microphone Sensitivity
AM : For 50% Modulation
SSB:·For 10 Wpep·Outpilt
FM : For 1 kHz Deviation
k) AMC Range
AM : 50 - 100% Modulation
SSB:
AM W
FM W
Wpep
AM dB
SSB dB
FM dB
SSB dB
SSB dB
AMmA
SSB mA
· FM-mA
mA
mA
mA
AM dB
SSB dB
FM dB
AM dB
SSB dB
FM dB
mV
mV
mV
dB
dB
NOMINAL
± 300
± 300
± 300
10.0
10.0
21.0
-50
-50
-50
-55
-50
3.000
800
3.eoo
3.000
3.000
3.000
-4
-4
-4
-4
-4
-4
1.0
1.0
1.0
50
50
LIMIT
± 1.500
± 1.500
± 1.500
8.0 - 14.0
8.0 - 14.0
18.0 - 26.0
-40
-40
-40
-40
-40
4.500
1.?QO
4-;500'
4.500
4.500
4.500
-10
-10
-10
-10
-10
-10
2.0
2.0
2.0
40
40

4. RECEIVER (AHL/NB Switch off')
UNIT
NOMINAL LIMIT
--
a)
Max Sensitivity
AM uV
Q.5 2.0
SSB uV 0.25 1.0
b)
Sensitivity f'or
lOdB S/N AM uV
0.5 2.0
SSB uV 0.25 1.0
FM : 20dB S/N FM uV 0.5 3.0
c)
AGC Figure of' Merit,
50 mV
for lOdB change in Audio
Output
AM dB
80
70
SSB dB 80
70
d}
Overall Audio Fidelity
at 6d.B down
Upper Frequency
AMHz 2.000 1.500 - 3.000
SSB Hz 3.000 2.000 - 4.500
)
FM Hz 2.500
1.500 - 4.000
Lower Frequency
AM Hz 300
100 - 500
SSB Hz 300 100 -
500
FM Hz 300 100 -
500
e} Adjacent Channel Selectivity
AM dB
70 60
(10 kHz 1 GEN}
f}
Maximum Audio OUtput Power
AM W 4.0 3.0
SSB W 4.0
3.0
FM W 4.0
3.0
g} Audio Output Power at 10% THD AM W 2.5 2.0
SSB W 2.5
2.0
FM W
2.5
2.0
h}
RF Gain Control Range AM dB
55
30 - 70
SSB dB 55 30 - 70
FM dB 55
30 - 70
i)
S/N Ratio at 1mV Input
AM dB 30
25
)
FM dB 35
25
j) Squelch Sensitivity at Threshold AM uV 0.5 2.0
SSB uV
0.5 2.0
FM uV- 0.5
2.0
k) Squelch Sensitivity at Tight AM uV
1.000
250 - 4.000
SSB uV
1.000
250 - 4.000
FM uV 1.000 250 - 4.000
1)
S Meter Sensitivity
at "S-9" (No Modulation) AM uV
100 25 - 400
SSB uV
100 25 - 400
FM uV 100 25 - 400
m) Image Rejection Ratio AM dB
65
50
SSB dB 65
50
FM dB 65 50
n) IF Rejection Ratio AM dB
85
70
SSB dB 85
70
FM dB 85 70
o) Oscillator Dropout Voltage
AM V 9
11
SSB V 9
11
FM V 9
11

)
)
UNIT NOMINAL
LIMIT
p) Battery Drain at No Signal
AM mA 500
800
SSB mB 500
800
FM mA
500
800
q) Battery Drain at Max.
Audio Output
AM mA 1.000 1.500
SSB mA 1.000 1.500
FM mA 1.000 1.500
r) Clarifier Range
AM kHz
± 7.0 More than ±
5.0
SSB kHz ± 7.0 More
than ± 5.0
FM kHz ± 7.0
More than ± 5.0
5. PUBLIC ADDRESS
a) Output Power
at .10% Distortion
w
2.5 2
NOTE
1) Shall have reverse polarity protection and operable with positive of negative
grounding
2) Operating Power Voltage : 13.SV + 15 - 20% DC
I

B. INSTALLATION
1. LOCATION
Plan the location of the transceiver and microphone bracket
before starting the installation. Select a location that is
convenient for operation and does not interfere with the
driver or passenger in the vehicle. In automobiles, the
transceiver is usually mounted to the dash panel with the
microphone bracket beside it.
2. MOUNTING AND CONNECTION
This radio is supplied with a universal mounting bracket.
The transceiver is held in the bracket by the four thumb screws.
supplied, permitting adjustment to the most convenient angle.
The bracket must be mounted with the screws supplied. The
mounting surface must be mechanically strong. Proceed as
follows to mount the transceiver :
a) After you have determined the most convenient location in
your vehicle, hold the radio with the mounting bracket in
the exact location desired. If nothing interferes with
mounting it in the desired position, remove the ~unting
bracket thumb screws and mark the mounting holes using
the bracket as a template. Before drilling the holes,
~e sure nothing will interfere with the installation of
the mounting screws. Drill the holes and mount the bracket
and then install the radio.
b) Connect the antenna cable plug to the standard receptacle
on the rear panel. Most CB antennas are terminated with a
type PL-259 plug which mates with the receptacle on the
rear panel.
c) .Connect the DC power input wire with the fuse (red) to +12V
DC. This wire extends from a plug which connects to the
rear panel. ln automobile installations, +12V DC is usual-
ly obtained from the accessory contact on the ignition
switch. This prevents the set being left on accidentally
when the driver leaves the car and also permits operating
the radio without the engine running. You can locate the
I

)
)
accessory contact on most ignition switches by tracing the
power wire from the AM broadcast receiver in the car.
d) Connect the black wire to ground. This is usually the
chassis of the car. Any convenient location with good
electrical contact may be used. (remove paint).
Note : See ground connection under GENERAL INFORMATION for
more detail.
e) Mount the microphone hanger on the side of the unit or near
the unit, using the screws supplied.
I

)
C. GENERAL INFORMATION
1. GROUND CONNECTION
This radio may be installed and used in any 12V DC negative or
positive ground system vehicle.
a) Negative ground system : Connect the Red power lead :from the
radio to the positive or (+) battery terminal or other con-
venient point, and connect the Black power lead to the chassis
or vehicle frame or (-) battery terminal.
b) Positive ground system : In the cases of positive ground sys~
tem, connect the Black power lead from the radio to the nega-
tive or (-) battery terminal or other convenient point, and
connect the Red power lead to the chassis or vehicle frame
or (+) battery terminal.
2. ANTENNA
This radio is designed to operate into a 50 ohm CITIZENS RADIO
antenna. Best result will be obtained :from your transceiver if
you use good antenna and properly install your antenna. (Refer
to the antenna installation instructions included w~th your an-
tenna.)
A vertically polarized quarter-wavelength whip antenna provides
the most reliable operation and greater range. The shorter loa-
ded-type whip antennas are more attractive, compact and adequate
for applications where the maximum possible distance is not re-
quired. Also, the loaded whip antennas do not present the pro-
blems of height imposed by the full quarter-wavelength whip.
When installed in a boat, the transceiver will operate most
efficiently when the antenna used has been especially designed
for marine applications.
Mobile whip antennas utilize the metal body of the vehicle as a
ground plane. When mounted on a corner of the vehicle, they are
slightly directional, in the direction of the body of the vehicle.
For all practical purposes, however, the radiation pattern is non-
directional. A slight directional characteristic will be observed
only at extreme distances. A standard antenna connector (Type

)
}
S0-239) is provided on the transceiver for easy connection to a
standard PL-259 cable termination.
Before installing the transceiver in a boat, consult your dealer
f'or information regarding an adequate grounding system and pre-
vention of' electrolysis between fittings in the hull and water.
3. BASE STATION OPERATION
To operate the transceiver from your home or of'f'ice, using regu-
lar house current as the power source, you will require a sepa-
rate power supply capable of' supplying 5 amps at a 13.SV'DC out-
put with a nominal input voltage of' 220 volts AC, 50/60 Hz.
Simply connect the red (+} and black (-} leads to the transceiver
to the corresponding DC terminals of' the power supply.
NOTE
Do not attempt to operate this transceiver by connecting
directly to 220V AC. When an AC power supply is used with
the transceiver for base station operation any Citizens
Band beam, dipole;·ground plane or vertical·antenna may be
used. A ground plane vertical antenna will provide the·
most uniform horizontal coverage.
4. REMOTE SPEAKER
The external speaker jack (EXT. SPKR) on the rear panel is used
f'or remote receiver monitoring. The external speaker should have
8 ohms impedance. When the external speaker is plugged in, the
internal speaker is disconnected.
5. PUBLIC ADDRESS
An external 8 ohm 4-watt speaker must be connected to the (PA
SPKR) jack located on the rear panel when the transceiver is used
as a public address system. The speaker should be directed away
from
the microphone to prevent accoustic feedback. Physical se-
paration or isolation of' the microphone and speaker is important
when operating the PA at high output levels.
6. OPERATING INSTRUCTIONS
The JACKSON operates on 226 AM/FM channels, 226 Upper Side Band
channels and 226 Lower Side Band channels.
When you receive the SSB signal in the proper mode (USB or I.SB),

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audio sound may be either too high pitched or low pitched. indica-
ting that your receiver may not be tuned to the exact same :frequen-
cy as the transmitter to which it is listening. The JACKSON is
equipped with a Clari:fier. By tuning the Clari:fier. you can
slightly change the :frequency o:f the receiver, so you get a normal
tone.
I

)
D. OPERATING CONTROLS
Your JACKSON, designed for ease of operation, is provided with
the following operating controls :
1. OFF/ON VOLUME : To turn the transceiver on, rotate the control
clockwise past click. To turn the transceiver off, rotate the
control counterclockwise past click. Rotate the control clock-
wise for a comfortable audio level.
2. SQUELCH : The squelch control is normally set to a position
which eliminates undesired background noise with no signal pre-
sent. With the· audio adjusted to a satisfactory level, rotate
the squelch control clockwise to the point where the sound from
the speaker is cut off. In this position, there will be no
sound :from the speaker until a signal is received. In order to
hear weak signals, it may be necessary to rotate the squelch
control counterclockwise, allowing some background noise to be
heard.
3. P.A. SWITCH (on SQUELCH) CONTROL : Full counterclockwise rota-
tion of the squelch control engages the PA :function. The PA
function should not be used unless an external speak~r is con-
nected. In the squelch (or CB) position, the PA function is
4.
disabled and the radio will transmit and receive on the selected
channel.
MODE SELECTION
:dThis switch
selects
AM,
FM, USB, or
LSB more
of operation. This selector
changes the mode of operation of
both transmitter and receiver simultaneously. Set the selec-
tor to the mode on which you wish to communicate.
5. MIKE GAIN : This control is used to adjust, as required, micro-
phone input sensitivity for optimum amount of modulation in
transmit. President Electronics citizen's band transceivers
have been designed to permit the user to attain levels of modu-
lation up to 100 % depending on the setting of the microphone
gain control, using the microphone provided with the unit.
President's automatic compression and peak limiting circuits
assure maximum modulation with minimum distortion.

)
6. RF GAIN : This control is used primarily to optimize reception
in strong signal areas. Gain is reduced by counterclockwise rota-
tion of the control.
7. CLARIFIER
The clarifier control is normally set to the center
position. This feature has several uses and can greatly enhance
receiver operation. First, if a received signal is slightly off
frequency, this control can be operated as required to optimize
the receiver frequency. The effectiveness of this clarifier fea-
ture under these conditions can.be observed either by li~tening
for a more readable signal at the speaker or by noting the S-
meter reading when the clarifier control is operated. Another
effective application of this control is in eliminating adjacent
channel interference from strong signals. Operate this control,
as required, to obtain minimum adjacent channel interference.
8. METER MODE SWITCH :
S/RF Posi t~n -: Meter indicates relative transmitter output power
when transmitting, input signal strength when receiving.
MOD Position : Meter indicates average percentage of modulation.
9. NB/ANL SWITCH : When switch is placed in NB/ANL position, the Auto-
matic Noise Limiter and the RF Noise Blanker are activated simul-
taneously.
10. + lOKHZ FREQUENCY SHIFT SWITCH : When switch is placed in + lOKHz
position, frequency is shifted lOKHz up. On following channels,
a channel can be used by setting this switch to + lOKHz position.
Normal
3
7
11
15
19
+ 10 KHz
3A
7A
llA
15A
19A
11. BAND SWITCH : This switch is used to select the band of frequency.
12. CHANNEL SELECTOR : This switch is used to select any one of the 40
Citizens Band channels. Channel 9 has been reserved for emergency
communications involving immediate safety of life of individuals or

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immediate protection of property.
13. ROGER BEEP SWITCH : When this switch is placed in the ROGER BEEP
position, your: ·radio automatically transmits the audio sign at
the end of your transmission. The listener can easily note your
transmission is over through the sign.

)
STEP
1
2
)
3
4
5
6
E • ALIGNMENT PROCEDURES
1. ALIGNMENT OF PLL & CARRIER OSCILLATOR PORTION
a) Test Equipment Required
- Oscilloscope
- DC Power Supply (13.BV)
-
Frequency Counter (0 - 50MHz)
- DC Voltmeter
b) Alignment Procedure
PRESET TO ADJUSTMENT REMARKS
Channel : 40
L12
Connect DC Voltmeter to TP-2 (R122).
Mode : AM, RX.
Atijust :for 6~0V ±() .• 1v on DC Voltmeter.
Clari : Center
Co~inn 2V to A Band Channel 1.
Band : E
PA/CB : CB
Same as above L13
Connect Oscilloscope to TP-3
(R73).
except
Adjust :for maximum reading on Oscilloscope.
BAND : C
Channel : 19
Mode : AM.FM,
RX
Same as above L14
Connect Frequency Counter to TP-3 (R73).
Adjust :for 16.490Mhz ± 20Hz on the Frequency
Counter.
Same as Step 2 L15
Connect Frequency Counter to
TP-3 (R73).
except Adjust :for
16.4925MHz ± 20Hz
on the Frequency
Mode : USB, RX Counter.
Same as Step 4 L16
Connect Frequency Counter to TP-3 (R73).
except
Adjust for
16.4875MHz ±20Hz on the Frequency
Mode : LSB, RX
Counter.
Same
as above
L24
Connect Frequency counter to TP-4 (R104).
Adjust f'or
10.6975MHz ±20Hz on the Frequency
Counter.
!

STEP PRESET TO
ADJUSTMENT
REMARKS
7 Same as Step 4
L23
Connect Frequency counter to TP-4 (R104).
Adjust for 10.6925MHz ± 20Hz on the Frequency
counter.
8 Same
as Step 4
L22
Connect Frequency counter to TP-5 (R82).
except
Adjust for
10.695MHz ± 20Hz on the Frequency
Mode : AM. TX
counter.
)
c) Test Equipment Connection (see following page)
)

~J
. ._.,,.
TRANSCEIVER
500 LOAD 8 ATT.
PTT
MIC
JACK ANT
OSCILLOSCOPE FREQ. COUNT
DC POWER SUPPLY
--
EJ
-0
0
~B
PROSE
GND
DC VOLT METER
E1J

)
L13
D
)
ALIGNMENT POINTS
TP2
R122
TP3
R73
-0
I
L12
D
L16
0-
TP5
R92
L14
DbJDL2
4 L22
OQD
TP4
o-R104

)
STEP
1
2
3
-.,
.)
4
5
6
2. ALIGNMENT OF TRANSMITTER PORTION
a) Test Equipment Required
- AF Signal Generator (1) for 500Hz and 1.000Hz
- AF Signal Generator (2) for 2.400Hz
- AF VTVM (150mV full scale)
- RF VTVM (50V :full scale)
- RF Powermeter (lOW Max. Thruline type)
50 ohm Dummy Load
-
Oscilloscope
-Harmonic Meter
- DC Volbneter
- DC Ammeter (150mA .full scale)
b)° Alignment Procedure
PRESET TO
ADJUSTMENT
REMARKS
Channel
:
19 VRlO
Disconnect the
PC-834AA from Check Point
of
Band : c
Main P.C.Board and
connect DC Ammeter to
Mode
: USB, _TX.
-:
TP-8(+), TP-6(-).
Adjust for 50mA on DC
No Modulation
Ammeter.
MIC GAIH : cw
PA/CB : CB
Same as Step 1
VR9
Connect DC
~eter to TP-8(+),
TP-7(-).
Adjust VR9
to obtain the· current 80mA.
Mode
:
USB IA2
Disconnect the DC Ammeter.
Connect PC-834AA to Check Point of Main
'"
P.C.Board.
Connect power meter, RF-VTVM
and Oscilloscope. Set VR8 CW maximum.
Turn the Cor of L42 CW maximum at the
bottom.
Same as above
L41,43,49
Adjust coils for
the
maximum indication.
While then, keep
output voltage under 25V
by adjusting SG.
Same as above
L42
Set E Band Channel
40,
adjust for maximum
reading and then set A B~d Channel 1,
adjust
for
minimum di.f.f erence from E Band Channel
40.
Channel
:
19 L30
Adjust
L30 to obtain
the maximum indication
Band : E
on the RF VTVM.
Mode
: USB
2 Tone
AF SG :
30mV

STEP PRESET TO
ADJUSTMENT
REMARKS
7 same
as above VR8
Adjust VR3 'tO obtain RF output of .:><:::.4v on
the RF VTVM.
8 Same
as Step 1 VR5
Adjust VR5 to obtain the minimum
carrier
leakage between USB and LSB.
9
Mode : AM, TX.
VRll
Adjust VRll to obtain RF
carrier
power of
No Modulation
lOW on RF Power meter.
Channel
: 19
Band : E .
10
Same as above
·VR7 AdJUSt
:ror -cne neecµe of B1J.t
1n Me-cer UJ
except
blank zone of TX Power Meter.
Push SW : S/RF
)
11
Same as above
\fR12
AdJUS-C v.tU.~ -co obtain ~ \negative}
except
modulation.
AF SG :
30mV
lKHz Mod.
12
Same as
above VR4
Connect Deviation·meter.
Adjust
for 3kHz
. .
except
Deviation
on Deviation meter.
mode : FM
13
Channel : 19
VR3
Set AF SG to_50% Modu1ation, then add 16dB.
Band : C
Adjust VR3 to 100% mudulation
indication
Push SW
:
MOD
on the transceiver meter.
14
Channel
:
19 VR6
Adjust Transmitter Frequency
for 27 .185MHz
Band : .C ± lOOHz.
No Modulation
Mode : AM
)
c) Test Equipment Connection (see following page)