Kenwood TR-2200G User manual

CONTENTS
EXTERNAL VIEW (20 esis te bee tee eae Sie ede Bob ae ae 3
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PARTS LIST
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PC BOARD
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SCHEMATIC DIAGRAM (SEMICONDUCTOR LEADS)..................... 23
SPECIFICATIONS © 23 sie och oA atte ee Sak ca ar ea al a Aaa 24

Telescopic
antenna
S-meter
‘Knob
(A)
Pushbutton
switch
(T90-0035-05)
(B31-0101-15)
~
({K21-0264-03)
(S$39-1016-05)
| Knob A . | 4-p connector
|
(K21-0246-04}
(EQ6-0403-05)
Power jack 3 Water-proof cap (A) ,
(E08-0304-05) _. (F19-0049-04)
Name Plate Earphone jack
Grommet (J59-0001-05)
(B40-0822-04) _ (£11-0003-15) yer ( |
Plunaer (159-Q004-05)
bee ae Bo
Rubber spacer (J30-0061-04)

TOP VIEW
Ls4
(L34-0012-05)
.
LsS
(L30-0005-05)
» Ls10 (L34-0013-05)
Ls9 (L34-0014-05)
Ls2 (L34-0010-05)
Ls8 (L32-0002-05)
Power
jack
VRs3
(R12-5014-05)
EO8-0304-0
(E08-0304-05) CFs1 (L.72-0015-05)
Ls6 (L30-0005-05)
Ls1 (L34-0009-05)
XLs1
(L77-0327-05)
—
CFs2(L72-1025-05)
Speaker
(T02-0005-15)
S-meter
(B31-0101-15)
Os17: uPC-20C
:
VRs1
(R12-4016-05)
Telescopic
antenna
Ls13 (1.30-0007-05) ap reams = {i ot? {L30-0006-05)
TCt1(C05-0009-15)
——
—
Lt4(L31-0175-05)
Lt
(1.31
O02
6
S-O5
)
eg
~
(t5(L31-0176-05)
£t9(L31-0179-05)-
Lt1(L30-0141-05)
Tone
unit.
Leos
(X52-1031-01)
-
Lt10(L31-0180-05)
Earphone jack ae
(E11-0003-15)
tg: 28C741—
O19: 2SC1479 —
Dt3: M1301:
T Ct3(L05-0010-15)
~ V1 (RO2-2010-05)
— VRt2(R12-2015-05)
_—. VR2 (RO2-2011-05)
=
VRtl.
(R12-2015-05)
—— 53 (S01-2018-05)
RECEIVER Xtal
oscillators
Battery case
Battery case
TRANSMIT Xtal
Dt4 M-1301
oscillators
Lt22(L34-0354-05)
eee
:
ae
ae
Trimmer
capacitors
for
Lt21(L34-0354-05)
3 :
7
ee
Poneman
-
aE
«TRANSMIT
frequency
adiustmant TCtra ~ Tet at
Cpa EE
(CO5-0030-15)

ADJUSTMENTS
CASE REMOVAL (See Fig. 1)
1. Release the rod-snaps at the bottom of the case.
2. Pull the case out while pushing the external antenna
connector.
Rod snap
nn
©
QO [m= FA
(1) Unhook the water-proof caps
Water-proof caps (9) Put! the rod snaps out
Fig. 1
PRINTED CIRCUIT BOARD REMOVAL (See Fig. 2)
1. Remove the screws securing the printed circuit board
(PCB) in place.
2. Slide the PCB sidewise to facilitate its removal.
3. Position the transceiver with the panel toward you
and lift the rear end of the PCB.
Screws
Fig. 2
Note:
To gain access to the TRANSMIT and RECEIVE circuits
for repair work, the only part to be removed is the PCB
in RECEIVE section: most of the circuits become accessi-
ble as you do so. An exception is the multiplier section,
which is located behind the speaker: to repair the circuits
of this section, disconnect the wires as shown in Fig. 3,
remove the PCB securing screws and, as in the removal
of RECEIVE section PCB, take out the multiplier PCB.
® TRANSMIT sectionPCB ©
REPAIRING THE MICROPHONE CONNECTOR
Correct connection of the microphone cord to the
connector is shown in Fig. 4.
Microphone cord (red)
Covered with shielded wire
Stand BY Ground
Black @ Microphone cord
White
(As viewed from the cord side)
MIC
Fig. 4

RECEIVE SECTION ADJUSTMENT
Local Oscillator Coil
1. Tune the transceiver to about 145 MHz.
2. Turn the slug of coil Ls8 clockwise until oscillation
stops.
3. Then turn the slug back 360 degrees for stabie oscil-
lation.
Sensitivity
1. Connect a signal generator to the external antenna
connector.
2.
Feed
a
signal
to
the
transceiver
(1
kHz
modulation,
7
kHz
frequency
deviation).
3. Adjust coils Ls1, 2, 4... 7, 9, 10 and TCt3 {mounted
on the TRANSMIT section PCB) until the meter reads
maximum with an optimum S/N ratio.
Discriminator Coil
1. Connect a signal generator to the external antenna
connector and an oscilloscope to the output terminal.
2. Apply a signal (1 kHz modulation, 7 kHz frequency
deviation, 10 dB =3uV output) to the transceiver.
3. Align coils Ls12 and 13 until output waveform is opti-
mum on the oscilloscope.
S-Meter
1. Connect a signal generator to the external antenna
_ connector.
2. Feed a 20 dB signal to the transceiver.
3. Adjust VRs1 until the meter deflects full scale (or
reads 10).
Note:
Meter reading below full scale calls for readjustment of
sensitivity.
Squeich
Set the channel selector knob to the channel that con-
tains a crystal and confirm that there is no signal re-
ceived. With any signal not being received adjust VRs2
until squelch opens between 9 and 2 o'clock.
Confirmations
1. The transceiver shall show no large difference in sen-
sitivity for a supply voltage range of 10.4 to 15.2
volts.
2. Sensitivity difference shall be within the specification
throughout the entire band including the band edges.
3. The transceiver shall not interfere with TV channel
(176 to 182 MHz) after the local oscillator has been
aligned.
TRANSMIT SECTION ADJUSTMENT
Note:
Use insulated screwdrivers for coil and trimmer adjust-
ments.
Multiplier and final stage
1. Connect a 50-ohm power meter to the external anten-
na connector.
2. Set the channel selector of Model TR-2200G to a
transmit frequency of 144.15 MHz and connect the
instruments as shown in Fig. 5.
Power meter
DC power supply
DC ammeter (1 amp} TR-2200G
Fig. 5
3. Operate the transceiver in the transmitting state and
adjust TCt1, 3 - 10 at a supply voltage of from 9 to
10 volts until the ammeter reads maximum.
4. Increase the supply voltage to 13 volts and adjust
TCt1 and 2 for a maximum output.
Note:
TCt2 should be set to a point at which the output is ap-
proximately 5% down with a minimum current drain.
This is to be achieved by reducing trimmer capacitance.
Modulation
1. Set the supply voltage to 13 volts and connect an
audio generator to the microphone connector.
2. Modulate the carrier with a 1 kHz 5 mV signal and
set the transceiver to the transmit state at 144.15
MHz.
3. Observe the waveform on an oscilloscope through a
linear detector. Adjust Lt2 until and optimum output is
obtained.
Adjustment Without Linear Detector
Apply a 3 mV, 1 kHz signal from the audio generator to
the microphone input and connect an audio frequency
VTVM to terminal TO1 (X56-1080-00). Adjust VRt2 until
the meter reads 360 mV. As still another method, anoth-
er TR-2200G transceiver may be used as monitor.

Maximum Frequency Deviation
1.
Connect
an
audio
generator
to
the
microphone
connector.
2.
Apply
1
kHz
signal,
100
mV
or
greater,
to
the
trans-
ceiver.
3.
Adjust
VRt2
to
limit
the
frequency
deviation
to
12
kHz
maximum.
TRANSMIT FREQUENCY (Fig. 6)
1. Prepare a pick-up coil, put it around the telescopic
antenna, and connect its lead to the frequency count-
er.
TR-2200G
Fig. 6
2. Adjust each channel to the exact TRANSMIT frequen-
cy by means of associated frequency adjust trimmer.
Note:
If the available frequency counter dose not measure 144
MHz, connect the counter to the base of Ot4 through a
0.01zF coupling capacitor. This set-up permits the count-
er to indicate fundamental frequencies. Adjustment toler-
ance is +200 Hz.
Each TRANSMIT frequency is related to its fundamental
frequency as follows:
FUNDAMENTAL
FREQ. (MHz)
TRANSMIT
CHANNEL
FREQ.
(MHz)
144.150
144.200
144.250
RF Meter
1. Use 13 volt supply voltage.
2. Connect a power meter to the external antenna
connector.
3. Adjust VRt3 and/or modify the position of the pick-up
lead, located near Lt22, until the meter reads figure 8.
(The same applies to the telescopic antenna.)
Transceiver
TR-2200G
Ammeter
ADJUSTMENT OF OTHER CIRCUITRY
Battery Check Meter
1. Set the supply voltage to 10 volts.
2. Adjust VRs3 (on the RECEIVE section PCB), until the
pointer deflects to between the red and black marks.
(Be sure not to allow the screwdriver, used in this
adjustment, to come in contact with the chassis and
other circuits.)
Charging Circuit (Fig. 7)
1. Turn the transceiver power switch off.
2. Disconnect one of the snaps at the battery holder and
measure the current.
Note: Checking charge current
ex
transceiver
power
switch
NA
should
be
off
mam
Disconnect
the
lead
at
one
of
~
the
battery
~~
snaps
Fig. 7
Model
Note:Charging current vs battery volgage curve for nick-
elcadmium cells is shown in Fig. 8. The charging current
may deviate from this curve depending on the particular
transceiver or cells used.
1 pattern of charge current decrease
—* Charge current (mA)
3 6 9 12 15
— Battery voltage (volts)
Fig. 8

Insufficient charge current will also result from defective
cells. A defective cell or a cell which has an increased
internal resistance, if any, can be found by replacing one
cell at a time with new one while measuring their charge
current. Fig. 9 shows the characteristic of the nickel-
cadmium cell.
Cell characteristic
15
+.
es
oe
ee
$
90
mA
discharge
rating
rae
E
51.0
oO
oO
| 0.5
——> Discharge time (hour)
Fig. 9
Confirmations
1. Oral input through the microphone shall be clearly
transmitted with sufficient modulation.
2. When the TRANSMIT frequency is varied across the
band, there shall be no sign of abnormal oscillation at
a supply voltage of from 10.4 to 15.2 volts as moni-
tored by a television set, frequency counter or other
devices.
3. The rated RF output shall be available at a standard
supply voltage throughout the band.
Note:
Confirmations 1 and 2 should be made with the built-in
telescopic antenna.

PARTS LIST
= PARTS LIST OF TR-2200G
Parts No. Description Remarks
CAPACITOR
CK45E1H102P Ceramic 0.001pF +100%
CE04W1C101(RL) Electrolytic 100uF 16WV
CK45F1H103Z Ceramic 0.01uF +80%
SEMICONDUCTOR
181555
CRYSTAL OSCILLATOR
L77-0253-05 Crystal oscillator 144.15MHz)
L77-0254-05 Crystal oscillator 144.20MHz)
L77-0255-05 Crystal oscillator 145.25MHz)
L77-0256-05 Crystal oscillator (R 144.75MHz)
L77-0257-05 Crystal oscillator (R 144.80MHz)
L77-0258-05 Crystal oscillator (R 145.85MHz)
POTENTIOMETER
RO2-2010-05 PC trimmer, 5kQ, with switch, (A) for AF
RO2-2011-05 PC trimmer, 5k2, with switch, (B) for SA
SWITCH
$01 -2018-05 Rotary switch
$39-1016-05 Pushbutton switch
MISCELLANEOUS
A01-0197-03 Case
AG9-0031-05 Viny! case
A10-0353-02 Chassis
A20-0342-25 Panel
A21-0129-04 Ornament panel (B)
A21-0142-04 Ornament panel (A)
BO5-0123-04 Saran net (A)
B31-0101-15 S-meter
B40-0822-04 Name plate
B42-0009-04 Passed sticker
B50-1016-00 Instruction manual
E04-0115-05 Type M connector (EXT. ANT)
E06-0403-05 4-p connector (jack)
E£08-0216-05 AC connector (jack)
E08-0304-05 Power jack
E11-0003-15 Earphone jack
E12-0001-05 Earphone plug
E23-0015-04 Grounding lug x 2
E23-0043-04 Antenna grounding lug
E30-0709-05 AC power cord
E30-01 10-04 Battery snap
E30-0220-05 Power plug with lead
F09-0009-05 Battery case (A)
FO9-0010-05 Battery case (B) x 2
F19-0049-04 Water proof cap (A)

F20-0076-13 Insulator (B)
F20-0081-03 Insulator (A)
G02-0021-04 Battery retaining spring
G02-0022-04 Spring plate x 2
G11-0008-04 Cushion (B)
G11-0034-04 Cushion
G13-0014-04 Insulator (Rubber)
G53-0013-04 Water-proof ring (A)
G53-0014-04 Meter packing
G53-00 15-04 Antenna bushing
H01-0969-13 Shipping case (internal)
H03-0238-14 Shipping case (external)
H10-0852-13 Foam styrol stuffing
H10-0853-13 Foam styrol stuffing
H20-0281-03 Protection cover
H25-0079-04 Bag x 2
H25-0123-04 . Bag
J02-0046-04 Leg x 2
J21-0392-04 Lead holder
J21-0448-04 Speaker mounting hardware x 2
J21-0706-04 Meter mounting hardware
J21-1130-04 Power jack mounting hardware
J21-1131-04 Phone jack mounting hardware
J30-006 1-04 Rubber spacer x 2
J31-0097-04 Collar x 2
J41-0012-04 Antenna insulator
J59-0001-05 Gromet x 2
J59-0004-05 Plunger x 2
J61-0019-05 Vinyl tie x 2
K21-0264-03 Knob (A)
K21-0246-04 Knob A x 2
T02-0005-15 Speaker
T91-0026-05 Microphone
T90-0035-05 Telescopic antenna
X43-1080-00 Power supply unit
X52-1030-01 Tone unit
X55-1030-61 RX unit
X56-1080-00 TX unit
m= PARTS LIST OF X43-1080-00 (POWER SUPPLY)
RESISTOR
RCOSGF2H330J Carbon 33 +5%
10