KENWOOD TM-521A 144MHz FM Transceiver Instruction Manual

144MHz FM TRANSCEIVER
TM-221A
TM-221ES
220MHz FM TRANSCEIVER
TM-321A
430MHz FM TRANSCEIVER
TM-421A
TM-421ES
440MHz FM TRANSCEIVER
TM-421A
1200MHz FM TRANSCEIVER
TM-521A
TM-S21E
INSTRUCTION MANUAL
KENWOOD CORPORATION

TM-521A 144MHz FM Transceiver

©PRINTED IN JAPAN B50-8221-20(K, M, T, W)(T)
89/12 11 10 9 8 7 6 5 4 3 2 1 88/12 11 10 9

Thank you for purchasing the new transceiver. This unit has been carefully engineered and manufactured 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.

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.

BEFORE OPERATION

*Safety precautions
Warning:**
When operating this transceiver mobile, please drive safely.
Never remove the case unless specified in this Instruction Manual. If the internal parts are accidentally touched, a serious electric shock might occur.

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.

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.

In case of abnormal smell
If an abnormal smell or smoke is detected, immediately turn the power OFF and disconnect the power cord. Contact your dealer or nearest Service Station.

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 ventilated.

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

Choose a location that is relatively free from vibration.

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.

SPECIFICATIONS AND ACCESSORIES

2-1. SPECIFICATIONS

Model ⇒
Specifications ⇓| TM-221A| TM-221ES| TM-321A| TM- 421A| TM-421ES| TM-521A| TM-521E
---|---|---|---|---|---|---|---
General| Frequency range| 144 to 148 MHz| 144 to 146 MHz| 220 to 225 MHz| 440 to 450 MHz (U.S.A. version)
430 to 440 MHz| 1240 to 1300 MHz
Mode| F3E (FM)
Antenna impedance| 50 ohms
Operating temperature| – 20°C to +60°C (-4°F to +140°F)
Power requirement| 13.8 VDC ‘115%
Grounding| Negative
Current drain| Transmit mode (Max.)| 9.5 A| 6.5 A| 8.5 A| 5.5 A
Receive mode with no input signal| 0.4 A| 0.6 A
Frequency stability| Better than ± 10 x 10-6| Better than ± 3 x 10-6
Dimensions| Wide| 141 mm (5-9/16″)
High| 42 mm (1-21/32″)
Deep| 193 mm (7-19/32
Weight| 1.2 kg (2.65 Ibs)
Transmitter| *Output power| HI| 45 W| 25 W| 35 W| 10 W
LOW| Approx. 5 W.
Adjustable up to out 30 W.| Approx 5 W.
Adjustable up to out 20 W.| Approx. 1 W.
Adjustable up to out 5W.
Modulation| Reactance modulation
Spurious radiation| Less than – 60 dB| Less than – 50 dB
Max. frequency deviation| ±5 kHz
Audio distortion (at 60% modulation)| Less than 3%
Microphone impedance| 500 to 600 ohms
Receiver| Circuitry| Double conversion super heterodyne
Intermediate frequency| 1st| 10.695 MHz| 10.7 MHz| 30.825MHzJ 21.6 MHz| 59.7 MHz
2nd| 455 kHz
Sensitivity(12 dB SINAD)| Less than 0.16µV
| – 6 dB| More than 12 kHz
Selectivity| – 60 dB| Less than 26 kHz| Less than 36 kHz
Spurious response| Better than 70 dB I| Better than 65 dB| Better than 40 dB
Squelch sensitivity| Less than 0.1 μV
Output (5% distortion)| More than 2 W across 8 ohms load
External speaker impedance| 8 ohms

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.

1. MC-48B DTMF Microphone (U.S.A. version only) …………. (191-0359-05) ……………. 1 ea.

2. Dynamic Microphone (Except U.S.A. version)………………… (191-0365-15) ……………. 1 ea.

3. Microphone Hook (U.S.A. version Only) ……………………….. (JS20-0319-24)………….. 1 ea.

4. Self-tapping Screw (U.S.A. version Only) ……………………….. (N46-3010-46) ………….. 2 ea.
   Mobile Mounting Kit

5. Bracket ……………………………………………………………………….. (S29-0416-03)…………… 1 ea.

6. SEMS Screw…………………………………………………………………. (NOQ-1530-05) ………… 4 ea.

7. Self-tapping Screw …………………………………………………………. (NOQ-0335-05) ………… 4 ea.

8. Flat Washer ……………………………………………………………………………………………………… 4 ea.

9. Stacking Plate (TM-421/521 series and TM-321A only)……….. (J21-4147-14)…………….. 2 ea.
   (TM-221/421 only) ………………………………………………………….. (EQO-2 111-05)

10. DC Power Cable (TM-521/321A only) ……………………………….. (EBO-2053-05)…………. 1 ea.

11. Spare Fuse, 10A (TM-221/421 series only)………………………….. (FO5-1031-05)………….. 1 ea.

12. Spare Fuse, 8A (TM-321A and TM-521 series only) ……………… (FO5-8021-O5)…………. 1 ea.
    Instruction Manual……………………………………………………………. (BOO-B221-XX)………… 1 copy
    Warranty Card ………………………………………………………………………………………………………… 1 ea.

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

INSTALLATION AND CONNECTION

Warning:
Never apply AC power to the DC Power Supply until all installation and connections have been completed.
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 selecting the location for the 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 drilled.
3. Drill four holes as marked using a 1/6” drill for Self-tapping Screws.
4. Install the Mounting Bracket using the supplied Self-tapping Screws (4 pcs.) and Flat Washers (4 pcs.)
5. Attach the transceiver temporarily using the SEMS Screws (4 pcs.).
6. The angle of the Mounting Bracket may be adjusted to any of five (5) possible viewing angles. Select the desired angle.
7. 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.

3-2. CONNECTIONS
Cautions:

1. Before connecting or disconnecting the DC Power Cable, be sure to turn off the POWER switches of both the transceiver and the DC Power Supply.
2. Observe polarity of the DC Power Cable. The transceiver operates on 13.8 VDC, negative ground. The DC Power Cable is color coded:
   Red  + (Positive polarity)
   Black — (Negative polarity)

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 connecting them to the battery.
   Make sure the positive (+) and negative (—) lead polarity are correct when wiring to the battery.
   ■ If the wiring hole in the fire wall or chassis is too small, disassemble the fuse holder to thread the wire through the hole.
   Cautions:
   

2. Before installing the DC Power Cable, be sure to remove the negative lead from the battery for safety.

3. After installation and wiring, be sure to double check for correct installation before reconnect- ing the negative lead to the battery terminal.

4. If the fuse opens, be sure to check that each conductor has not been damaged by  short-circuiting, etc.
   Then replace with a new fuse of the same rating.

5. After completing the wiring, wrap the fuse holder with heat resistant tape to protect against heat and moisture.

6. Do not remove the fuse even if the power cable is too long.

• 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 such as the PG-3B.

3-2-2. Fixed Station
A regulated DC Power Supply (13.8 VDC) is required. The PS-430 and the PS-50 are recommended.

3-2-3. Antenna
Warning:
For protection against fire, electric shock, personal injury, or damage to the radio, use a lightning arrester 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 coaxial cable for this connection. If the antenna is far from the transceiver the use of low loss coaxial cable is recommended. Match the impedance of the coaxial 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.

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 encountered at 1244.150 MHz and 1245.050 MHz. (TM-521A/E only)
4-1. CONTROL FUNCTIONS
4-1-1. Front Panel
Note:
The TM-221A front panel is used for illustration purposes.

1. VFO/M (VFO/Memory Channel) key
   This key is used to switch between the VFO and Memory Channel modes.

2. 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 during 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-221A/321A/ 421A/521A only), and CTCSS decode (TM-221A/ 321A/421A/521A only), and operating the ALT (Auto Lock Tuning) system (TM-521A only).

3. 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 control.

4. Display Panel
   The LCD displays operation information such as transmit/receive frequencies, memory channel information, offset, tone frequency etc. See page 9 for additional information.

5. VOL (Volume) control
   Turn the control clockwise to increase the volume and turn the control counterclockwise to decrease the volume.

6. LOW (HI/LOW) switch
   This switch is used to select the desired transmitter output power level.

7. POWER switch
   Press to turn on. Press again to turn off.

8. MICROPHONE connector
   Plug the standard or optional microphone into this jack.
   Front view
   

9. SQL (Squelch) control
   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.

10. Function keys
    See Section 1. Function Keys on page 9.

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

1. Function Keys
With the TM-221A/321A/421A/521A

With the TM-221ES/421ES

With the TM-521E

1. SHIFT key
   The SHIFT key is used to select the desired transmitter offset during repeater operations. When the key is pressed, the shift modes cycle from + to — [— to —— (European version)] to simplex (no indicator).
   (See Section 4-6 REPEATER)

2. 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.

3. 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.

4. 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.

5. ALERT key (TM-221ES/421ES only)
   This switch is used to activate the priority alert function. See Section 4-5-6 Priority Alert for additional information on this function.

6. ALT key (TM-521E only)
   This key is used to activate the Automatic Lock Tuning system. See Section 4-2-4 for additional information on this key.

7. 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.

2. Display Panel
With the TM-221A/321A/421A/521A 
Note:
The TM-221A Display Panel is used for illustration purposes.

With the TM-221ES/421ES/521E
Note:
The TM-221ES Display Panel is used for illustration purposes.

With the TM-521 series
Note:
The TM-521 Display Panel is used for illustration purposes.

1. SHIFT indicator
   Turns on during repeater offset operations. See Section 4-6 REPEATER for additional information on this indicator.

2. REV (Reverse) indicator
   Turns on when the reverse function has been selected.

3. AL (Alert) indicator (TM-221ES/421ES only)
   Turns on when the alert function has been selected.

4. SCAN indicator
   Turns on to indicate the scan function has been selected.

5. CTCSS (Continuous Tone Coded Squelch System) indicator (TM-221A/321A/421A/521A only)
   Turns on to indicate the CTCSS function is active.

6. TONE indicator (Excludes TM-221ES/421ES European versions and TM-521E)
   Turns on to indicate the tone function is active.

7. M (Memory In) indicator
   On whenever the M.IN key has been depressed.

8. Memory Channel Number display
   Indicates the selected Memory Channel Number.

9.  indicator
   The indicator indicates the Memory Channel currently in the display will be skipped during Memory Channel scan.

10. ON AIR indicator
    On during transmit operations.

11. S & RF meter
    This level meter indicates the relative receive input signal strength or transmitter RF output.
    During low power operations this meter functions as a microphone input level meter to check for proper microphone operation.

12. BUSY indicator
    On whenever the squelch is open.

13. Frequency display
    Displays the transmit/receive frequency, Frequency Step, or Tone Frequency (TM-221A/321A/421A/ 521A only).

14. ALT and Direction indicators (TM-521 series only) ALT indicator:
    Turns on to indicate the Auto Lock Tuning function has been selected.
    Direction indicator:
    When the ALT system is operating the Direction indicator will turn on if the system shifts the receiver frequency.
    Please refer to Section 4-2-4 ALT System for additional information.

4-1-2. Rear Panel

1. ANT (Antenna) connector
   Attach an antenna with an impedance of 50 ohms to this connector.

2. SP (Speaker) jack
   This jack is for connection of an 8-ohm external speaker.

3. Fuse holder
   Contains one of the following fuses:
   TM-221/421 series : 10A
   TM-321A and TM-521 series : BA

4. 13.8 VDC power input connector
   Connect the supplied DC Power Cable to this connector. Pay close attention to the polarity (the DC Power Cable is color-coded; red is positive and black is negative), when connecting the cable to the power source.

4-1-3. Microphone

TM-221A/321A/421A/521A U.S.A. version only

① and ② UP/DWN (Up/Down) switches
These switches are used to step the VFO frequency or Memory Channel up and down. The frequency will change continuously if the switches are pressed and held.
③ PTT (Push To Talk) switch
The transceiver will be placed into’ transmit whenever this switch is pressed. Operations such as scanning will be cleared when this switch is pressed.
④ 16-Tone DTMF Keypad (U.S.A. version only)
Used to activate the DTMF encoder. See Section 4-6 REPEATER for additional information on this item.

4-2. RECEPTION
4-2-1. Initial Control Settings

1. Connect the power supply and antenna and then set the witches and controls as follows:
   POWER switch : OFF
   POWER switch of the DC power supply
   (Fixed Station) : OFF
   VOL control : Fully counterclockwise
   SQL control : Fully counterclockwise
   Note:
   The TM-221A front panel is used for illustration purposes.
   Note the initial factory delivered settings for Frequency, Tone Frequency, Memory Channel and Frequency Step are shown in the accompanying table.

2. Turn on the DC power supply and then press the POWER switch on the radio; the display will indicate a frequency.

3. Adjust the VOL control clockwise until a signal or noise is heard.

4. Rotate the TUNING control and select an open channel. Then turn the SOL control clockwise until the noise just disappears.

5. Select the desired frequency using the TUNING control or UP/DWN switches on the microphone. (See Section 4-2-2 Frequency and Memory Channel Selection.)
   If a signal is received, the BUSY indicator will turn on and the S-meter will deflect.

6. To turn off the transceiver, turn off the transceiver’s POWER switch before you turn off the power supply, or if in a vehicle, before you stop the engine.

Model ⇒| TM-221A| TM-221ES| TM-321A| TM-421A| TM- 421ES| TM-521A| TM-521E
---|---|---|---|---|---|---|---
VFO Frequency| 144.000 MHz| 220.000 MHz| 440.000 MHz
(U.S.A. version)| 430.000 MHz| 1240.000 MHz
430.000 MHz
Frequency Step| 5 kHz| 12.5 kHz| 20 kHz| 25 kHz
Memory Channel| Memory Channel 0
Memory Channel| 144.000 MHz| 220.000 MHz| 440.000 MHz
(U.S.A. version)| 430.000 MHz| 1240.000 MHz
430.000 MHz
Tone Frequency| 88.5 Hz| —-| 88.5 Hz| —-| 88.5 Hz| —-

4-2-2. Frequency and Memory Channel Selection
The desired operating frequency and the Memory Channel may be selected by using either the TUNING control or the microphone UP/DWN switches. Press the VFO/M key to alternate between the VFO and the Memory Channel modes.
4-2-3. Frequency Step Selection
The frequency step can be selected by using the following procedure:

1. Press the VFO/M key to select the VFO mode.
2. Press the M.IN key and then the REV key. Whenever the M.IN key is pressed, the M indicator will turn on. You must complete the desired action within 5 seconds, or the M indicator will turn off. If the indicator goes off, you must press the M.IN key again.
3. Select the desired frequency step using the TUNING control or the microphone UP/DWN switches. The figure below shows how the TUNING control and UP/DWN switches will increase or decrease in size.
4. To return to the normal receive frequency, press any key except the LOW or the POWER switches, or turn the TUNING control.

4-2-4. ALT (Auto Lock Tuning) System (TM-521 series only)
The ALT system operates similar to an AFC (Automatic Frequency Control) system. This system is useful when the frequency of either station starts to drift. When this occurs distortion of the signal is the usual result. The ALT system will correct for this apparent drift.

Note:
The frequency display will not change, even though the receive frequency might shift in order to properly tune the incoming signal. When the ALT system is Operating the Direction indicator will turn on if the system shifts the receiver frequency. The Direction indicator will show you if the incoming signal was higher or lower than the displayed frequency.

To utilize this feature:
(With the TM-521A)

1. Press the M.IN key. The M indicator will turn on for 5 seconds.
2. While the M indicator is on press the SHIFT key. If you do not press the SHIFT key while the M indicator is on you will have to start over at step one. The ALT indicator will turn on and the receiver will automatically center itself on the incoming signal.
3. To release the ALT system, press the M.IN key and then the SHIFT key. The ALT and the Direction indicators will turn off.

(With the TM-521E)

1. Press the ALT key. The ALT indicator will turn on and the receiver will automatically center itself on the incoming signal.
2. To release the ALT system, press the ALT key. The ALT and the Direction indicators will turn off.

■ ALT operation using the RC-10.
Use the following procedure to turn on the ALT function with the RC-10 Remote Controller.

1. Press the F key. The F indicator will turn on for 5 seconds.
2. While the F indicator is on, press the 1 key. If you do not press the 1 key while the F indicator is on you will have to start over at step 1.

To release ALT System operation, repeat steps 1 and 2. Please refer to the Instruction Manual provided with the RC-10 for instructions on programming other RC-10 functions.
4-2-5. Confirmation Tones
An audible tone will sound whenever the TUNING control is rotated (except in the VFO and Memory Channel modes), or any keys or the microphone UP/DWN switches are depressed. If you do not want this audio confirmation, press the M.IN key and then the CTCSS (ALERT with the U.K. and European versions) key. Whenever the M.IN key is pressed, the M indicator will turn on. You must complete the desired action within 5 seconds, or the M indicator will turn off. If the indicator goes off, you must press the M.IN key again.
To restore the confirmation tone press the M.IN key and then the CTCSS (ALERT) key again.
4-3. TRANSMISSION
Cautions:

1. Ensure that an antenna with a low standing wave ratio (SWR) is attached to the antenna connector before attempting to transmit. Failure to provide proper termination may result in damage to the final amplifier section.

2. Always check to ensure the frequency is clear before transmitting.

3. Select the desired operating frequency using any of the methods described above.

4. Check the frequency to see if it is occupied before you transmit.

5. Press the microphone PTT switch. The ON AIR indicator will light.

6. Speak into the microphone. The recommended distance to the microphone is 2 inches (5 cm). Talking too far away may result in reports of weak audio.

7. Release the microphone PTT switch to return to the receive mode. The ON AIR indicator should go out.

4-4. MEMORY
4-4-1. Microprocessor Reset
A lithium battery is contained in the transceiver to retain memory. Turning off the POWER _ switch, disconnecting the power cable, or a power failure will not erase memory. The battery should last for approximately five years. For replacement information please refer to Section 5-5 MICROPROCESSOR  BACKUP LITHIUM BATTERY REPLACEMENT.
4-4-2. Microprocessor Initialization
When you want to erase all programmed data, or if the display should show erroneous information, you should reset (initialize) the microprocessor using the following procedure.

1. Turn the POWER switch off.
2. Press and hold the VFO/M and the M.IN keys and turn on the POWER switch.
3. Release the VFO/M and the M.IN keys; the M indicator and the Memory Channel Number will display for approximately 5 seconds after you release the keys.

4-4-3. Memory Channel!
This transceiver provides 14 Memory Channels (0-9, A-d). In addition to serving as a normal memory channel some of the Memory Channels serve a dual purpose to specify other parameters. The functions of these Memory Channels are described below.

• Memory Channel 1 is used to store the frequency for the Priority Alert function. (TM-221ES/ 421ES only)
• Memory Channel A is used to store the lower limit for the Programmable Band Scan function.
• Memory Channel b is used to store the upper limit for the Programmable Band Scan function.
• Memory Channels C and d are used to store odd split repeater data.

4-4-4, Memory Channel Contents
The following data can be stored in each Memory Channel.

TM-221A
TM-321 A
TM-421A
TM-521A| Frequency
SHIFT status
REV status
TONE status
Tone Frequency
CTCSS status and Tone Frequency
TM-221 ES
TM-421 ES
TM-521 E| Frequency
SHIFT status
REV status

4-4-5. Memory Entry

1. Memory Channels 0—9, A and b (Simplex/Standard Offsets)
2.  Press the VFO/M key to select the VFO mode.
3. Select the desired operating frequency, and shift.
4. Select the CTCSS key if tone squelch is desired. (TM-221A/321A/421A/521A only)
5. Press the TONE key if required. (European version excluded)
6. Select the desired Tone Frequency. See Section 4-7. TONE FREQUENCY SELECTION. If CTCSS (Tone Squelch) has been selected, the tone function will be automatically activated. (TM-221A/ 321A/421A/521A only).
7. Press the M.IN key. The Memory Channel Number display will light.
8. Select the desired Memory Channel using the TUNING control or the microphone UP/DWN switches. You must do this within 5 seconds of pressing the M.IN key (Step 6), or the M indicator will turn off. If the indicator goes off, you must press the M.IN key again.
9. Press the M.IN key within 5 seconds of selecting the Memory Channel. If the indicator goes off, you must press the M.IN key again in order to complete the desired function.
10. Odd Split Memory Channels C and d
11. Enter the desired receiver frequency as described in Section 4-4-5. 1. above, in Memory Channel C or d.
12. Select the desired transmitter frequency using the TUNING control or the microphone UP/DWN switches.
13. Press the M.IN key to complete the operation.

4-4-6. Memory Shift (Transferring Data from Memory Channel! to the VFO)

1. Press the VFO/M key to select the Memory Channel mode.
2. Select the desired Memory Channel. If an Odd Split Memory Channel (C or d) is selected, only the receive data will be transferred.
3. Press the M.IN key and then the VFO/M key to transfer the data.

4-5. SCAN
The following scan options are available:
Programmable Band Scan (VFO mode)
Memory Channel Scan (Memory Channel mode)
4-5-1. Programmable Band Scan
The scan frequency range is determined by the frequencies stored in Memory Channels A and b. The frequency stored in Memory Channel A must be lower than the frequency stored in Memory Channel b for Programmable Band Scan to function properly. If the frequency in Memory Channel A is equal to or greater than the frequency stored in Memory Channel b, scan will proceed over the entire tuning range of the radio.

1. Before pressing the SCAN key, adjust the SQL control to the threshold level.
2. Determine the desired scan frequency range and enter the frequencies into Memory Channels A and b.
3. Press the VFO/M key to select the VFO mode.
4. Press the SCAN key to initiate scan.
5. To clear scanning, press any key such as the SCAN key, microphone PTT or UP/DWN switches, or rotate the TUNING control, except LOW (HI/LO) or POWER switch.

4-5-2. Memory Channel Scan

1. Press the VFO/M key to select the Memory Channel mode.
2. Before pressing the SCAN key, adjust the SQL control to the threshold level.
3. Press the SCAN key to initiate scan.
4. To clear scanning, press any key such as the SCAN key, microphone PTT or UP/DWN switches, or rotate the TUNING control, except LOW (HI/LO) or POWER switch.

4-5-3. Scan Direction
Scanning begins in the direction that corresponds to the direction that the TUNING control was last turned, or with respect to which of the microphone UP/DWN switches was last depressed. If you pressed the UP switch before initiating scan, scan will proceed in a positive direction. If the DWN switch was pressed scan will tune down in frequency.
4-5-4. Scan Hold
The transceiver will stop on a busy channel and then resume after a 5-second delay. You must cancel scan operations to remain on the channel.
4-5-5. Memory Channel Lockout
The Memory Channel Lockout function allows you to temporarily skip unwanted Memory Channels during the Memory Channel Scan mode.

1. Press the VFO/M key to select the Memory Channel mode.
2. Select the Memory Channel that you want to skip using the TUNING control or the UP/DWN switches.
3. Press the M.IN key and then the SCAN key. Whenever the M.IN key is pressed, the M indicator will turn on. You must complete the desired action within 5 seconds, or the M indicator will turn off. If the indicator goes off, you must press the M.IN key again. A star (*) will appear to the left of the Memory Channel Number. This indicates the Memory Channel will be skipped during scan operations.
4. To cancel the Memory Channel Lockout press the M.IN key and then the SCAN key.

4-5-6. Priority Alert (TM-221ES/421ES only)
Memory Channel 1 will be checked at approximately 5-second intervals to check for activity. If the frequency is occupied, a beep will sound. If the audio confirmation function has been turned off, no beep will sound, even if Memory Channel 1 is busy. Pressing the ALERT key will switch this function off and on.
Note:
The alert function will not work when the RC-10 is connected to the TM- 221ES/421ES.

4-6. REPEATER
4-6-1. Transmitter Offsets
All amateur radio repeaters utilize a separate receiver and transmitter section. The receiver frequency may be either above or below the transmitter frequency.
For most repeater’s offsets are as follows:
TRANSMITTER OFFSET FREQUENCY

Display ⇒
Model ⇓| +
– ()| –
– – ()
---|---|---
TM-221 series| + 600 kHz| – 600 kHz
TM-321A| + 1.6 MHz| – 1.6 MHz
TM-421A| + 5 MHz| – 5 MHz
TM-421 ES| European market| - 1.6 MHz| - 7.6 MHz
U.K. market| + 1.6 MHz| – 1.6 MHz
TM-521A| + 12 MHz| – 12 MHz
TM-521E| + 35 MHz| – 6 MHz

This transceiver allows you to store the frequency, and offset direction in Memory Channels O—9, and A—b, or you can select these functions directly from the keyboard.
(With the TM-221A/321A)
The TM-221A/321A have been programmed according to the standard ARRL Band Plan, regarding transmitter offsets. Please see the enclosed charts for additional information. You can, of course, over- ride this by using the SHIFT function, if desired.

4-6-2. Offset Direction
To select the desired transmitter offset direction press the SHIFT key. Each time you press the key the radio will advance from one offset to the other, i.e. “+ to AH” (“-” to – – “” with TM-421ES European version) to no offset (simplex).
4-6-3. Reverse Function
Some repeaters utilize a ‘‘Reverse Pair’’, i.e. the transmit/receive frequencies are exactly the reverse of another repeater. For example repeater A uses 146.000 for a transmit frequency (OUTPUT) and 146.600 for receive (INPUT). Repeater B uses 146.000 for its receive and 146.600 for its transmit frequency. It would be inconvenient to have o reprogram the radio each time if you were in range of both repeaters.
The REV key has been provided to allow you to reverse the transmit and receive frequencies.
To use the Reverse function press the REV key. The REV indicator will light in the Display Panel to remind you that you are working a reverse repeater pair.
To return to normal offsets press the REV key again.
This function is also useful to check the input frequency of the repeater, so that you can determine if you are within simplex communications range. (With the TM-221ES/421ES/521E) Transmission is inhibited when the REV key is engaged.
4-6-4. Tone Operations
Some repeaters require the use of a control signal to activate the repeater. Several versions are currently in use worldwide.
(With the TM-221A/321A/421A/521A)
Sub audible tones are sometimes used. In the United States 38 different sub audible tone frequency selections are possible. (See Section 4-7 TONE FRE- QUENCY SELECTION)
(With the TM-221ES/421ES/521E)
In Europe a 1750 Hz tone is used in transmit. Press the TONE key to transmit the access tone, then press the PTT switch.
In the United Kingdom a 1750 Hz tone burst at the beginning of each transmission is used.
Since use of this tone is required in the Europe and the United Kingdom, an 1750 Hz tone encoder is included as standard equipment.

4-6-5. Autopatch (U.S.A. only)
Some repeaters offer a service known as autopatch. This allows you to dial a telephone number from your radio and carry out a telephone conversation, much like a car telephone, or cellular telephone. This function requires the use of a DTMF (Dual Tone Multi Frequency) pad. In addition to the normal 12 keys that are found on your telephone the MC-48B microphone also provides 4 additional keys, A, B, C, and D. These keys are required by some repeater systems for various control functions. You should check with the control operator of your repeater to determine if their use is required. A chart is provided that lists the tones that are generated when you press each key.

1. To activate the DTMF pad, press and hold the PTT switch.
2. Now press the keys just as you would dial a telephone.
3. The radio will remain keyed for about 2 seconds after you press each number, so you can release the PTT switch without unkeying the radio.

AUDIO TONES

High Tone Low (HZ) ⇒
Low Tone (Hz) ⇓| 1209| 1336| 1477| 1633
---|---|---|---|---
697| 1| 2| 3| A
770| 4| 5| 6| B
852| 7| 8| 9| C
941| *| 0| #| D

4-7. TONE FREQUENCY SELECTION (TM-221A/321A/421A/521A only)

1. To select the Tone Frequency press the M.IN key and then the TONE key. The Display Panel will indicate a Tone Frequency. Whenever the M.IN key is pressed, the M indicator will turn on. You must complete the desired action within 5 seconds, or the M indicator will turn off. If the indicator goes off, you must press the M.IN key again.
2. Select the desired Tone Frequency using the UP/DWN switches on the microphone or the TUNING control.
   Available CTCSS Tone Frequencies**** Hz| Hz| Hz
   ---|---|---
   67.0
   71.9
   74.4
   77.0
   79.7
   82.5
   85.4
   88.5
   91.5
   94.8
   97.4
   100.0
   103.5
   107.2
   110.9| 114.8
   118.8
   123.0
   127.3
   131.8
   136.5
   141.3
   146.2
   151.4
   156.7
   162.2
   167.9
   173.8
   179.9
   186.2| 192.8
   203.5
   210.7
   218.1
   225.7
   233.6
   241.8
   250.3
3. Press any key or the PTT switch on the microphone to return to the receiver frequency display. A tone will be transmitted whenever the PTT switch is depressed.

4-8. TONE SQUELCH (CTCSS) (TM-221A/321A/421A/521A only)
4-8-1. Tone Squelch Operation Initiated by the Distant Station.
Note:
This function requires the use of the optional TSU-5 Programmable Tone Decoder Unit.
This function allows you to remain squelched until the proper Tone Frequency is received. If you are on a busy repeater this can be quite an aid.

1. Press the CTCSS key. The CTCSS indicator will light in the Display Panel.
2. Your radio will now remain squelched until the proper code is received. You should ensure all the stations you wish to communicate with use the same Tone Frequency. Please note that the 97.4 Hz Tone does not function for decode purposes. Please see Section 4-7 TONE FREQUENCY SELECTION for programming the CTCSS Tone Frequency.
3. To release the Tone Squelch function (normal noise activated squelch), press the CTCSS key again. The CTCSS indicator should go out on the Display Panel.

4-8-2. To Open the Tone Squelch of a Distant Station
Even if the optional TSU-5 Programmable Tone Decoder Unit is not installed, your radio can open the Tone Squelch of a distant station.

1. Press the CTCSS key. The CTCSS indicator will light in the Display Panel.
2. Select the same Tone Frequency between the stations you wish to communicate. See Section 4-7 TONE FREQUENCY SELECTION.
3. Press the microphone PTT switch.
4. To release the Tone Squelch function, press the CTCSS key again. The CTCSS indicator should go out on the Display Panel.

MAINTENANCE AND ADJUSTMENT

5-1. GENERAL INFORMATION
Your transceiver has been factory aligned and tested to specification before shipment. Under normal circumstances the transceiver will operate in accordance with these operating instructions. All adjustable trimmers and coils in your transceiver were preset at the factory and should only be readjusted by a qualified technician with proper test equipment. Attempting service or alignment without factory authorization can void the transceiver’s warranty. When operated properly, the transceiver will provide many years of service without requiring realignment. The information in this section gives some general service procedures which can be accomplished without sophisticated test equipment.
5-2. SERVICE
Should it ever become necessary to return the equipment to your dealer or service center for repair, pack it in its original box and packing, and include a full description of the problems involved. Also include your telephone number. You need not return accessory items unless directly related to the service problem.
Service note:
Dear OM, if you desire to correspond on a technical or operational problem, please make your note short, complete, and to the point, and PLEASE make it readable.
5-4. IN CASE OF DIFFICULTY
5-4-1. Receive
Please list:
Model and Serial Number
The problem you are having.
Please give sufficient detail to diagnose. Information such as other equipment in the station, meter readings and anything else you feel might be useful in attempting diagnosis.
Caution:
Do not pack the equipment in crushed newspapers for shipment. Extensive damage may result during shipment.
Notes:

1. When claiming warranty service, please include a photocopy of the bill of sale, or other proof of purchase showing the date of sale must accompany the radio.
2. Record the Date of Purchase, Serial Number and Dealer from whom purchased.
3. For your own information, retain a written record of any maintenance performed on the unit.

5-3. CLEANING
The knobs, front panel and cabinet of the transceiver are likely to become soiled after extended use. The knobs should be removed from the transceiver and cleaned with a neutral soap and warm water. Use a neutral soap (no harsh chemicals) and a damp cloth to clean the cabinet and front panel.

Indicator does not light and data is not displayed when POWER switch is pressed.| 1. Wrong power polarity.
2. Fuse is blown.| 1. Connect red to “+” and black to
2. Replace with the specified fuse after repairing the cause.
For the fuse rating, see Sections 5-6.
Display is dark.| Power voltage is low.| Check voltage for 13.8 VDC ±15%
No sound from the speaker. No signal can be received.| 1. VOL control is turned too far counterclockwise.
2. Squelch is closed.
3. PTT switch of microphone is pressed setting the unit in the transmit mode.
4. CTCSS is operating.| 1. Turn the VOL control.
2. Turn the SQL control counterclockwise.
3. Turn PTT switch off.
4. Press the CTCSS key.
Scan fails.| Improper scan control setting, such as SQL control adjustment.| See Section 4-5.
Memory can not be backed up.| Backup battery voltage is low.| See Section 5-5.

5-4-2. Transmit

2. Connect antenna securely.
Can not access to repeater.| 1. Setting of the TONE, SHIFT, REV keys are wrong.
2. Wrong Tone Frequency is selected.| 1. Refer to Section 4-6.
2. Refer to Section 4-7.

5-5. MICROPROCESSOR BACKUP LITHIUM BATTERY REPLACEMENT
Lithium battery replacement should be performed by an authorized KENWOOD service facility; either your KENWOOD dealer, or the factory, since this unit con- tains CMOS type circuitry.
Notes:

1. When the lithium battery is replaced, the microprocessor must be reset, using the procedure in Section 4-4-2.
2. When the lithium battery fails, the radio’s microcode functions are not affected. Only information stored in memory will be cleared.

5-6. FUSE REPLACEMENT
If the fuse blows;
DISCONNECT the AC Power Cable and replace with the specified fuse only after determining the cause, or contact either your KENWOOD dealer, or the factory to repair the cause.
Warning:

1. Never connect the AC cable to the AC outlet until fuse replacement has been made.
2. Never use a large amperage fuse. Replace with a new fuse of the same rating.

This transceiver is equipped with the fuse(s) listed below. If the fuse blows, determine the cause before replacing the defective fuse. (Replacement fuses are available from your authorized KENWOOD dealer.)

FO5-8021-05 (8 A) for TM-321A and TM-521 series only
DC Power Cable| FO5-2036-05 (20 A)| 2 ea.

5-7. ORDERING SPARE PARTS
When ordering replacement or spare ‘parts for your equipment, be sure to specify the following:
Model and serial number of your transceiver.
Schematic number of the part.
Printed circuit board number on which the part is located.
Part number and name, if known, and quantity desired.
Part numbers for most replacement parts is contained in the service manual (available as an option from your dealer).
5-8. ADJUSTMENTS
5-8-1. Cover Removal
Caution:

1. Before removing the top cover, turn the power supply and radio POWER switches off, and disconnect the Power Cable.

2. Do not pinch wiring when closing the cover.

3. Loosen the four screws on both the right and left sides.

4. Remove the four screws attaching the top cover. Remove the top cover and set aside.

5. Reverse steps 1 and 2 to reassemble the radio.

5-8-2. Low Power Output
Adjust VR7 on PC board to adjust the output of the transceiver in the low power position. The adjust- ment range is 1 to 30 watts on the TM-221 series, 1 to 20 watts on the TM-321A and TM-421 series, and 0.5 to 5 watts on the TM-521 series.
5-8-3. Microphone Gain
Adjust VR3 on PC board to the desired level.
Caution:
Too much microphone gain can cause reports of audio distortion.

OPTIONAL ACCESSORIES

Note: Some optional accessories may not be available in your area.
6-1. TSU-5 PROGRAMMABLE TONE DECODER UNIT
(TM-221A/321A/421A/521A only)
Caution:

1. Before removing the top cover, turn the power supply and radio POWER switches off, and disconnect the Power Cable.
2. Do not pinch wiring when closing the cover.

Installation

1. Loosen the four screws on both the right and left sides.
2. Remove the four screws attaching the top cover. Remove the top cover and set aside.
3. Temporarily set the speaker aside.
4. Remove the jumper as shown in the illustration.
5. Connect the 7-pin connector to the TSU-5 as shown in the accompanying illustration.
6. Install the TSU-5 using the two screws provided.
7. Route the 2-pin connector attached to the TSU-5 as shown in the accompanying illustration, and attach it to the same plug that the jumper wire was removed from in step 3.
8. Replace the speaker. Make sure that the chassis fits in the guides on the back of the speaker assembly.
9. Attach the top cover using four screws.
10. Tighten the four side screws.

6-2. MC-43S HAND MICROPHONE (8-pin)
Caution:
Some of the early versions of the MC-43S UP/DWN Microphone were delivered with a wire connected between the microphone hook and pin number 6 (six) of the microphone connector.
This wire is used on some foreign transceivers and must be disconnected before the microphone can be used with the TM-221/421/521 series and TM- 321A radios. If you connect this microphone to the TM-221/421/521 series and TM-321A before checking for this wire there is a possibility that you may experience erratic display or operation of the TM-221/421/521 series and TM-321A by static discharge.

6-3. OTHER ACCESSORIES

• PS-430 DC POWER SUPPLY
  May be used with the TM-221/421/521 series and TM-321A for stable operation.

• PS-50 HEAVY DUTY DC POWER SUPPLY
  May be used with the TM-221/421/521 series and TM-321A for stable operation.

• SP-430 EXTERNAL SPEAKER
  The SP-430 is an attractive, compact external speaker. This low-distortion speaker provides clear reproduction of the high-quality audio obtained from the transceiver.

• SP-50B MOBILE SPEAKER (8 ohms)
  Compact and smart high quality external speaker provides flexibility of installation for maximum convenience.

• P-41 MOBILE SPEAKER (4 ohms)

• MC-85 MICROPHONE (8-pin)
  The MC-85 is a unidirectional high-class electret condenser microphone provided with the output selective switch, audio level compensation circuit, low cut filter, level meter, PTT and LOCK switches.

• MC-80 MICROPHONE (8-pin)
  The MC-80 is an omnidirectional electret condenser microphone provided with UP/DOWN switches, volume adjustment for output level, PTT and LOCK switches, built-in pre-amplifier.

• MC-60A MICROPHONE (8-pin)
  The zinc die-cast base provides high stability, and the MC-60A is complete with PTT and LOCK switches, UP/DOWN switches, and impedance selector switch and a built-in pre-amplifier.

• MC-55 MOBILE MICROPHONE (8-pin)
  The MC-55 provides UP/DOWN switches, LED display for switching transmit or receive, adjustable microphone gain, automatic receive returning circuit (approx. 5 minutes) and many functions.

• MC-48B AUTOPATCH UP/DOWN HAND MICROPHONE (8-pin)
  The MC-48B is 16-key autopatch Up/Down microphone with PTT switch. Encodes 16 autopatch tones. UP/DWN switches provide step frequency change, or initiate band scan in the appropriate direction, if held depressed momentarily.

• HS-7 MICRO HEADPHONES (16 ohms)

• SW-200A/200B SWR/POWER METER (supplied with a coupler)
  SW-200A supplied with SWC-1. SW-200B supplied with SWC-2. Selectable peak- reading/RMS. SWR/POWER meters cover 1.8~150 MHz (SW- 200A), 140~450 MHz (SW- 200B) in range of 0 ~ 20/200W, full scale for base station use.

• SW-100A/100B SWR/POWER METER
  Compact and lightweight SWR/POWER/VOLT meters cover 1.8~150MHz (SW-100A), 140 ~450 MHz (SW-100B) in range of 150W full scale for mobile use.

• SWT-1/SWT-2 ANTENNA TUNING UNIT
  The SWT-1 (2m band) and the SWT-2 (70 cm band) are an antenna tuning unit designed for use in con- junction with an SWR/POWER meter to allow efficient transmission. This unit is especially convenient for monitoring SWR, using a KENWOOD SWR/POWER meter.

• SWC-4 DIRECTIONAL COUPLER
  The SWC-4 Directional Coupler is designed for use in conjunction with the SW- 200A/200B SWR/POWER Meters to cover 1200~ 1300 MHz. The coupler is capable of handling a maximum input of 20 W.

• RC-10 REMOTE CONTROLLER
  The RC-10 Remote Controller provides the following functions.
  1. Direct entry of the desired Transmit/Receive Frequencies using the numeric keypad.
  2. Transmit/Receive Frequency or Memory Channels up or down control.
  3. 16-key autopatch operation.
  4. Volume control
  5. Squelch on or off control.
  6. Wher connected to two transceivers allows duplex communications.
  7. ALT System operation (TM-521 series only)
  For additional information, please refer to the Instruction Manual provided with the RC-10.

• MB-201 MOBILE MOUNT
  The mobile mount MB-201 allows easy installation and removal of the TM-221/421/521 series and TM-321A.

• PG-4G EXTENSION CORD
  May be used with the RC-10 to connect a second transceiver for duplex operation.

• PG-3B DC LINE NOISE FILTER
  May be used with the TM-221/421/521 series and TM-321A to suppress ignition noise.

BLOCK DIAGRAM AND CIRCUIT DIAGRAM

7-1. BLOCK DIAGRAM
7-1-1. TM-221 series

Note:……………………
Block Diagram is subject to change without notice due to advancements in technology.

7-1-4. TM-521 series

Note:
Block Diagram is subject to change without notice due to advancements in technology.

REFERENCE

8-1. ANTENNA
8-1-1. Fixed Station
Various types of fixed station antennas are commercially available. Select your antenna according to available space and intended application.

Transceiver performance depends largely on the type of antenna used. For fixed station operation there are ground plane antennas (omnidirectional) and Yagi antennas (unidirectional). The Yagi antenna is suitable for DX (Long distance) operation or communication with a specific party.

8-1-2. Mobile
Various types of antennas for UHF/VHF mobile operation are available. Please consult your dealer for information on these antennas.
Note:
For gutter-mount installation, the antenna bracket must be grounded to the car body as shown below. Attach the antenna securely, referring to the antenna installation instructions provided with the antenna.

8-2. MOBILE INSTALLATION HINTS
8-2-1.Noise Reduction
In motor vehicles, noise is generated by the ignition system. Other sources of noise include the wiper and heater motors.
It is imperative that some preventive measures be taken to reduce the noise to the lowest possible level.
(a) Antenna location selection
Since ignition noise is generated by the vehicles engine, the antenna must be installed as far from the engine as possible.
(b) Bonding
The component parts of motor vehicles, such as the engine, transmission, muffler system, accelerator, etc., are coupled to one another at DC and low frequencies, but are isolated at high frequencies. By connecting these parts using heavy, braided ground straps, ignition noise can be reduced. This connection is called bonding’’.
(c) Use ignition suppressor cable or suppressor spark plugs
Noise can be reduced by using spark plugs with internal resistors, or resistive suppressor ignition cable.

Model TM-221A/221ES/321A/421A/421ES/521A/521E
Serial No………………………….
Date of Purchase………………
Dealer……………………………..

KENWOOD CORPORATION
Shionogi Shibuya Building. 17-5, 2-chome Shibuya, Shibuya-ku, Tokyo 150, Japan
KENWOOD U.S.A. CORPORATION
PO. BOX 22745, 2201 East Dominguez St., Long Beach, CA 90801-5745, U.S.A.
KENWOOD ELECTRONICS DEUTSCHLAND GMBH
Rembrucker Str. 15, 6054 Heusenstamm, West Germany
KENWOOD ELECTRONICS BENELUX NV.
Mechelsesteenweg 418 E 1930 Zaventem. Belgium
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
(INCORPORATED IN NSW)
4E. Woodcock Place, Lane Cove. NSW. 2066, Australia

References

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