Kenwood TM 421 ES Owners Manual

Page 2

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 : 144MHz FM transceiver (45W)
(U.S.A. and general markets)

TM-221ES: 144 MHz FM transceiver I45W)
(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 135W)
(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~221 A.

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 persona) injury.

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-421 E.

1. BEFORE OPERATION ...................................
2. SPECIFICATIONS AND ACCESSORIES
2-1 .
2-2.
3. INSTALLATION AND CONNECTION ..
3-1 .
3-2,
4. OPERATION .................................
4-1 ,
4-2.
4-3.
4~4,
45,
4-6.
4-7.
4-8.
5. MAINTENANCE AND ADJUSTMENT.
5-1 .

CONTENTS

SPECIFICATIONS ......
ACCESSORIES .........

INSTALLATION ....................
CONNECTIONS .........................

oomumoame-Aw

CONTROL FUNCTIONS . ..
RECEPTION ...................................... 1 1
TRANSMISSION .................................... 13
MEMORY ......
SCAN ........................................
REPEATER ...............................
TONE FREQUENCY SELECTION.
TONE SQUELCH (CTCSS) ......

GENERAL INFORMATION . ..

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

5-3, CLEANING ..................................

54. IN CASE OF DIFFICULTY ...................

5-5. MICROPROCESSOR BACKUP LITHIUM

BATTERY REPLACEMENT ....................... 19

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

5-7. ORDERING SPARE PARTS. .19

5-8. ADJUSTMENTS ........... ..19
6. OPTIONAL ACCESSORIES ........................... 20

6-1. TSU-5 PROGRAMMABLE TONE

62.
6-3.
7. BLOCK DIAGRAM AND CIRCUIT DIAGRAM
7-1 ,
7-2.
8. REFERENCE .............
8-1 .
8»2.

DECODER UNIT ..................................... 20
M0433 HAND MICROPHONE
OTHER ACCESSORIES ........

BLOCK DIAGRAM ...........................
CIRCUIT DIAGRAM .

ANTENNA .......... ..
MOBILE INSTALLATION HINTS ................. 30