Kenwood TM-521E User Manual

144MHz FM TRANSCEIVER

TM-221A TM-221ES

220MHz FM TRANSCEIVER

TM-321A

430MHz FM TRANSCEIVER

TM-421A TM-421 ES

440MHz FM TRANSCEIVER

TM-421 A

1200MHz FM TRANSCEIVER

TM-521A TM-521E

INSTRUCTION MANUAL

KENWOOD OORPORATION

©PRINTED IN JAPAN B50-8221-2CXK, M, T, W)(T) 89/12 11 10 987654321 88/12 11 10 9

Thank you for purchasing the new transceiver. This unit has been carefully engineered and manufac tured to rigid quality standards, and should give you satisfactory and dependable operation for many years.

IMPORTANT:

----------------------------------------------

1. Please read this Instruction Manual carefully

before placing your transceiver in service.

2. Save this Instruction Manual.

This Instruction Manual covers the following models:

TM-221A : 144 MHz FM transceiver (45W)

(U.S.A. and general markets)

TM-221ES: 144 MHz FM transceiver (45W)

(U.K. and European markets)

TM-321A : 220 MHz FM transceiver (25W)

(U.S.A. only)

TM-421A : 430 MHz FM transceiver (35W)

(General markets)

TM-421A ; 440 MHz FM transceiver (35W)

(U.S.A. only)

TM-421ES : 430 MHz FM transceiver (35W)

(U.K. and European markets)

TM-521A : 1200 MHz FM transceiver (10W)

(U.S.A. only)

TM-521E : 1200 MHz FM transceiver (10W)

(European market)

When there are differences in operation, separate instructions will be given for each model. Illustrations show the TM-221A.

The following

explicit definitions apply in this

manual:

Warning:

Risk of fire or electric shock may occur. Do not disregard !

Caution

Equipment damage may occur, but not personal injury.

Note

If disregarded, inconvenience only, no risk of equipment damage or personal injury.

CONTENTS

1. BEFORE OPERATION

2. SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS........................................................ 4

2- 2. ACCESSORIES....................................................... 5

3. INSTALLATION AND CONNECTION

3- 1. INSTALLATION....................................................... 6

3- 2. CONNECTIONS....................................................... 7

4. OPERATION.................................................................... 8

4- 1. CONTROL FUNCTIONS 4-2. RECEPTION 4-3. TRANSMISSION

4-4. MEMORY.....................................................................13

4-5. SCAN...........................................................................14

4-6. REPEATER

4-7. TONE FREQUENCY SELECTION..............................17

4- 8. TONE SQUELCH (CTCSS)....................................17

5. MAINTENANCE AND ADJUSTMENT...........................18

5- 1. GENERAL INFORMATION....................................18

5-2. SERVICE.....................................................................18

5-3. CLEANING..................................................................18

5-4. IN CASE OF DIFFICULTY 5-5. MICROPROCESSOR BACKUP LITHIUM

BATTERY REPLACEMENT

5-6. FUSE REPLACEMENT...............................................19

5-7. ORDERING SPARE PARTS.......................................19

5- 8. ADJUSTMENTS

6. OPTIONAL ACCESSORIES 6- 1. TSU-5 PROGRAMMABLE TONE

DECODER UNIT 6-2. MC-43S HAND MICROPHONE

6- 3. OTHER ACCESSORIES........................................21

7. BLOCK DIAGRAM AND CIRCUIT DIAGRAM ....24

7- 1. BLOCK DIAGRAM 7- 2. CIRCUIT DIAGRAM

8. REFERENCE..................................................................30

8- 1. ANTENNA...............................................................30

8-2. MOBILE INSTALLATION HINTS................................30

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19 20

20 20

24 26

3 4

TM-221ES/421ES MODEL IDENTIFICATION NOTES.

Please note that these model numbers do not appear

on the front panel of the radio. It will appear on the

Model Number Plate on the bottom of the radio and

on the shipping box. The front panel will only say TM-221E or TM-421E.

1. BEFORE OPERATION

Safety precautions

Warning:

When operating this transceiver mobile, please drive safely.

Never remove the case unless specified in this In struction Manual. If the internal parts are accidental ly touched, a serious electric shock might occur.

--------------------

Never touch internal parts.

If a metal object, such as a hair pin or a needle,

comes into contact with the power socket on the

rear panel, a dangerous electric shock may result. For families with children, never permit children to

put anything, especially metal, inside this unit.

Notes on installation Do not place the unit in a place which is exposed to

direct sunlight, near a heating appliance, etc.

Do not store or use the unit in a dusty location or in a moist atmosphere. Select a location that is well ven tilated.

To maintain good ventilation, do not cover the unit. Place the unit at least 10 cm (4 inch) away from the walls.

Touching the power plug when your hands are wet may result in a serious electric shock.

Never pull, bend or stretch the power cord. This

could damage the power cord, resulting in a broken

cord or short-circuit.

Always grasp the plug.

In case of abnormal smell If an abnormal smell or smoke is detected, im

mediately turn the power OFF and disconnect the power cord. Contact your dealer or nearest Service Station.

Choose a location that is relatively free from vibra

tion.

Cleaning

Do not use volatile solvents such as alcohol, paint

thinner, gasoline, benzine, etc. to clean the cabinet.

Use a silicone cloth or a clean dry cloth.

2. SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS

Model

Specifications

Frequency range Mode

Antenna impedance Operating temperature Power requirement Grounding

Transmit mode

Current drain

Frequency stability

Dimensions

Weight

^Output power

Modulation Spurious radiation Max. frequency deviation ±5 kHz Audio distortion (at 60%

modulation) Microphone impedance Circuitry Double conversion superheterodyne Intermediate

frequency Sensitivity! 12 dB SINAD)

Selectivity

Spurious response Squelch sensitivity Output (5% distortion) External speaker impedance

(Max.) Receive mode with

no input signal

Wide High Deep

HI 45 W

LOW

1 St

2nd

-6 dB

-60 dB

TM-221A

144 to

148 MHz

Approx. 5 W. Adjustable up to out 30 W.

10.695 MHz 10.7 MHz 30.825MHz 21.6 MHz

TM-221ES

144 to

146 MHz

9.5 A 6.5 A

Better than 70 dB Better than 65 dB

TM-321A

220 to

225 MHz

-20°C to +60°C (-4°F to +140°F)

0.4 A

Better than ±10x10'®

25 W 35 W

Approx. 5 W. Adjustable up to out 20 W.

Less than -60 dB

Less than 26 kHz

More than 2 W across 8 ohms load

TM-421A

440 to 450 MHz (U.S.A. version)

F3E (FM)

50 ohms

13.8 VDC ±15% Negative

141 mm (5-9/16")

42 mm (1-21/32")

193 mm (7-19/32")

1.2 kg (2.65 lbs)

Reactance modulation

Less than 3%

500 to 600 ohms

455 kHz

Less than 0.16 nW

More than 12 kHz

Less than 0.1 /iV

8 ohms

TM-421ES

430 to 440 MHz

8.5 A

TM-521A

1240 to 1300 MHz

Better than ±3x10'®

Approx. 1 W. Adjustable up to out 5 W.

Less than — 50 dB

Less than 36 kHz

Better than 40 dB

TM-521E

5.5 A

0.6 A

10 W

59.7 MHz

Notes:------------------------------------------------------------------------

1. Circuit and ratings are subject to change without

notice due to advancements in technology.

2. * : Recommended duty cycle:

1 minute : Transmission 3 minutes : Reception

2-2. ACCESSORIES

Please unpack your new transceiver carefully, and confirm that the accessories listed below are included in the box. If any of the items is missing contact the dealer where the radio was purchased.

® MC-48B DTMF Microphone (U.S.A. version only) ..........................................(T91-0359-05).............................1 ea.

(2) Dynamic Microphone (Except U.S.A. version)

(D Microphone Hook (U.S.A. version only)....................................................................(J20-0319-24).............................1 ea.

0 Self-tapping Screw (U.S.A. version only) Mobile Mounting Kit

0 Bracket.....................................................................................................................(J29-0416-03).............................1 ea.

0 SEMS Screw............................................................................................................(N09-1530-05)

(7) Self-tapping Screw...............................................................................................(N09-0335-05)

0 Flat Washer...............................................................................................................................................................4 ea.

(D Stacking Plate (TM-421/521 series and TM-321A only)

(TM-221/421 only)..........................................................................(E30-2111-05)

O) DC Power Cable (TM-521/321A only)........................................................................(E30-2053-05)

(Jj) Spare Fuse, 10A (TM-221/421 series only)..............................................................(F05-1031-05).............................1 ea.

(0) Spare Fuse, 8A (TM-321A and TM-521 series only)

Instruction Manual...........................................................................................................(B50-8221-XX)

Warranty Card....................................................................................................................................................................1 ea.

........................................................

...................................................................

...........................................

...............................................

(T91-0365-1 5)............................1 ea.

(N46-3010-46)

(J21-4147-14)

(F05-8021-05).............................1 ea.

............................

...........................

............................

...........................

2 ea.

4 ea. 4 ea.

2 ea.

1 ea.

1 copy

o o o o

AFTER UNPACKING

Shipping container:

Save the boxes and packing in the event your unit needs to be transported for remote operation, maintenance, or service.

3. INSTALLATION AND CONNECTION

Warning:------------------------------------------------------------------------

Never apply AC power to the DC Power Supply until all installation and connections have been com pleted.

3-1. INSTALLATION

Cautions:-----------------------------------------------------------------------

1. Do not place the unit in an area that is exposed

to direct sunlight, or near a heater, etc.

2. Do not store or use the unit in a dusty location or in a moist atmosphere. Select a well ventilated location.

3. To maintain good ventilation:

Remove all packing materials. Do not cover the unit. Place the unit at least 10 cm (4") away from

the walls.

3-1-1. Mounting Bracket Installation (Mobile) Warning:------------------------------------------------------------------------

Consider ease of operation and safety when select ing the location for the Mounting Bracket.

Attach the transceiver temporarily using the SEMS Screws (4 pcs.).

Mounting Bracket

The following tools are required for installing the Mounting Bracket.

1/6" drill for Self-tapping Screws. No. 2 Philips Screw Driver.

1. Select a location in which to install the Mounting

Bracket.

2. Use the Mounting Bracket as a template to locate the holes and mark four points to be drill ed.

Mark four points.

Drill four holes as marked using a 1/6" drill for

Self-tapping Screws.

Install the Mounting Bracket using the supplied

Self-tapping Screws (4 pcs.) and Flat Washers

(4 pcs.)

Mounting Bracket

The angle of the Mounting Bracket may be ad justed to any of five (5) possible viewing angles. Select the desired angle.

Hold the transceiver in place and tighten the four (4) SEMS Screws using a wrench or screw

driver.

Warning:

-----------------------------------------------------------------

Make sure that the transceiver will not slip out of place while operating the vehicle.

3-1-2. Stacking Plate

(TM-321A and TM-421/521 series only)

To stack the TM-321A, TM-421 series and/or TM-521 series with the TM-221 series, connect them with the supplied Stacking Plate. Only one Mounting Bracket will be required so save the other Mounting Bracket and mounting hardware for future use. Select the lower pair of mounting holes on the bracket as shown in the accompanying diagram when securing the lower radio.

Flat Washer

Self-tapping Screw

3-2. CONNECTIONS

Cautions:

1. Before connecting or disconnect

2. Observe polarity of the DC

3-2-1. Mobile

1. Battery Connections

Connect the DC Power Cable directly to the battery terminals. Use of the cigarette lighter socket can lead to poor connection, and result in poor performance. Pay close attention to the polarity of the cables when con necting them to the battery.

Cautions:-----------------------------------------------

1. Before installing the DC Power Cable, be sure to

2. After installation and wiring, be sure to double

3. If the fuse opens, be sure to check that each con

---------------------------------------------

Make sure the positive (+) and negative (-) lead polarity are correct \Aihen wiring to the battery.

ing the DC Power Cable, be sure to turn off the POWER switches

Red

Fuse (20A)

of both the transceiver and the DC Power Supply.

Power Cable. The transceiver operates on 13.8 VDC, negative ground. The DC Power Cable is

® e

Battery

color coded:

Red ^ -I- (Positive polarity) Black — (Negative polarity)

remove the negative lead from the battery for

safety. 4.

check for correct installation before reconnect ing the negative lead to the battery terminal. 5.

ductor has not been damaged by short-

Engine compartment

DC Power Cable

Passenger compartment

_____i_____

Select the location where the power cable is protected from heat, moisture or abrasion. Secure the cable.

Make sure the cable

does not directly con tact the edge of the hole by using a grommet.

If the wiring hole in the fire wall or chassis is too

small, disassemble the fuse holder to thread the wire through the hole.

From passenger compartment

Thread like this.

circuiting, etc. Then replace with a new fuse of the same rating. After completing the wiring, wrap the fuse holder with heat resistant tape to protect against heat and moisture. Do not remove the fuse even if the power cable is too long.

To the

1 transceiver

2. Ignition Noise

The transceiver has been designed to suppress

ignition noise; however, if excessive noise is present, it may be necessary to use suppressor spark plugs (with resistors), or an external Noise Filter

3-2-3. Antenna

Warning:

-------------

For protection against fire, electric shock, personal injury, or damage to the radio, use a lightning ar rester in your antenna lines.

The type of antenna that is used will greatly affect the performance of the transceiver. Use a properly adjusted antenna, of good quality, to enable your transceiver to perform at its best. The antenna input

impedance is 50 ohms. Use 50-ohm VHF/UHF coax ial cable for this connection. If the antenna is far

3-2-2. Fixed Station

A regulated DC Power Supply (13.8 VDC) is re quired. The PS-430 and the PS-50 are recommend ed.

from the transceiver the use of low loss coaxial cable is recommended. Match the impedance of the coax ial cable and that of the antenna so that the SWR is less than 1.5 to 1. The protection circuit in the transceiver will activate if the SWR is particularly poor (greater than 3 to 1).

Note:-----------------------------------------------------------------------------

High SWR values will cause the transmitter output to drop, and may lead to TVI or BCI reports.

4. OPERATION

Warning:----------------------------------------------

------------------------------------------------

1. When operating this transceiver mobile, please drive safely.

2. Remove all packing materials before operating this transceiver.

Note;

----------------------------------------------------------------------------------------------------

An internal heterodyne tone resulting from internal mixing may be en countered at 1244.150 MHz and 1245.050 MHz. (TM-521A/E only)

Note:

4-1. CONTROL FUNCTIONS

4-1-1. Front Panel

(D (2) (D

VFÒ/M M Hz KENWOOD 144MHz FM TRANSCEIVER TM 221 A

- REV + SCAN CTCSS TONE

--------------------------------------------------------------------------------------

The TM-221A front panel is used for illustration purposes.

..CO n n

Hu.-i tu

ESSI □□□□□□□□□□□□□□

SHIFT REV

SCAN

CTCSS

TONE

"I Q

(D VFO/M (VFO/Memory Channel) key

This key is used to switch between the VFO and Memory Channel modes.

0 LOW (HI/LOW) switch

This switch is used to select the desired transmitter output power level.

(9) (|:

(D M.IN (Memory In) key

This key is used to enter a frequency, offset, etc. in to the desired Memory Channel. The key is used dur ing VFO operations only. When this key is pressed during memory operations the contents of the memory are transferred to the VFO and switch the set back to the VFO mode. This key is also used when programming the offset, offset frequency, tone frequency (TM-221 A/321 A/ 421A/521A only), and CTCSS decode (TM-221 A/ 321A/421A/521A only), and operating the ALT

(Auto Lock Tuning) system (TM-521A only).

(D MHz key

Used to change frequencies rapidly. During VFO operations, pressing this key will cause the kHz digits to disappear from the display. Rotating the TUNING control will then change the frequency in 1

MHz steps. This function will be released by pressing any key or

microphone PTT switch except the LOW (HI/LOW)

and POWER switches. This function is also canceled

5 seconds after the last input from the TUNING con trol.

0 Display Panel

The LCD displays operation information such as

transmit/receive frequencies, memory channel infor

mation, offset, tone frequency etc. See page 9 for

additional information.

® VOL (Volume) control

Turn the control clockwise to increase the volume

and turn the control counterclockwise to decrease

the volume.

(7) POWER switch

Press to turn on. Press again to turn off.

d) MICROPHONE connector

Plug the standard or optional microphone into this jack.

(8) gnd (PTT)

(J) Microphone

audio

DOWN

Front view

0 SQL (Squelch) control

0UP

(7) GND (Microphone)

RX detector output (Approx.

100 mV/10 kil)

0 8 V/Max. 15 mA

The SQL control is used to eliminate noise during no signal periods. Normally this control is adjusted clockwise until the noise just disappears, and the BUSY indicator goes off. (Threshold level)

For scan operations this control must be set to the

threshold point. When an incoming signal is weak or

unstable, readjust the SQL control for optimum reception.

(jJ) Function keys

See Section 1. Function Keys on page 9.

(Q) TUNING (VFO) control

This control is used to select the desired transmit/ receive frequency. Memory Channel, Frequency Step, Tone Frequency (TM-221 A/321 A/421 A/ 521A only), and Scan Direction.

1. Function Keys

With the TM-221A/321A/421A/521A

0 (D

SHIFT

REV '

SCAN

CTCSS

0 0

TONE

0 TONE key

Activates the tone circuit for repeater control. This key is also used to open the squelch of a distant sta

tion who has activated its CTCSS key. Refer to Sec tions 4-6 REPEATER and 4-8 TONE SQUELCH

(CTCSS) for additional information on this control.

With the TM-221ES/421ES

SHIFT

With the TM-521E

rev'

SCAN

ALEFIT

TONE

0 0 0 0 0

SHIFT rev'

SHIFT key

The SHIFT key is used to select the desired transmit ter offset during repeater operations. When the key

is pressed, the shift modes cycle from -I- to — [ — to

-----

(European version)] to simplex (no indicator).

(See Section 4-6 REPEATER)

0 REV (Reverse) key

When the REV key is depressed it is used to reverse the transmit/receive frequencies during repeater operations.

(With the TM-221A/321A/421A/521A)

This will allow you to check the input of the repeater or to operate on a reverse repeater pair.

(With the TM-221ES/421ES/521E)

This will allow you to check the input of the repeater. Transmission is inhibited when the REVERSE key is

engaged.

SCAN alt'

TONE

2. Display Panel

With the TM-221A/321A/421A/521A

Note:

-------------------------------------------------

The TM-221 A Display Panel is used for illustration purposes.

SCAN CTCSS

TONE

,,, c o n n

(0)-

-S&RF

With the TM-221 ES/421ES/52IE

Note:------------------------------------------

^ ll EBl □□□□□□□□□□□□□□

The TM-221 ES Display Panel is used for illustration purposes.

U.Ji I u

OVER

•®

SCAN key

Press the SCAN key to initiate scanning, press again

to cancel scan. For additional information on this

function refer to Section 4-5 SCAN.

0 CTCSS (Continuous Tone Coded Squelch

System) key (TM-221A/321A/421A/521A only)

Refer to Section 4-8 TONE SQUELCH (CTCSS) for additional information on this key.

0 ALERT key (TM-221 ES/421ES only)

This switch is used to activate the priority alert func tion. See Section 4-5-6 Priority Alert for additional

information on this function.

ALT key (TM-521E only)

This key is used to activate the Automatic Lock Tun

ing system. See Section 4-2-4 for additional infor

mation on this key.

With the TM-521 series

Note:----------------------------

The TM-521 Display Panel is used for illustration

purposes.

® (D

scan CTCSS

n c n n I«

LJi U U

S&Rf

OVER

+ 20 hidden pages