HYT TC-620 User manual

TC-620 Owner’s Manual
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Contents
Introduction ................................................................................................................................2
Safety and General Information ................................................................................................. 3
Specifications ............................................................................................................................. 4
Product Inspection...................................................................................................................... 5
Getting Started ........................................................................................................................... 7
Battery Information..................................................................................................................... 9
Antenna Information ................................................................................................................. 12
Assembly and Disassembly ..................................................................................................... 12
General Radio Operations........................................................................................................ 17
Functions and Settings............................................................................................................. 20
CTCSS/CDCSS ................................................................................................................ 20
Battery Save ..................................................................................................................... 20
Power Adjust ..................................................................................................................... 20
Time-out Timer (TOT)........................................................................................................ 21
Battery Strength Indicator.................................................................................................. 21
Monitor / Squelch Off ........................................................................................................ 21
Scan.................................................................................................................................. 22
Busy Channel Lockout (BCL)............................................................................................ 24
Low Battery Alert ............................................................................................................... 24
Voice Operated Transmit (VOX)........................................................................................ 24
Troubleshooting ....................................................................................................................... 26
Care and Cleaning ................................................................................................................... 27
Optional Accessory .................................................................................................................. 28
Channel Frequency Table ........................................................................................................ 30
CTCSS Table (38).................................................................................................................... 30
CDCSS Table (83) ................................................................................................................... 31
Glossary ................................................................................................................................... 33

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Introduction
Thank you for your purchase of the HYT TC-620 radio - the choice for professionals. TC-620 is
a professional radio that with exquisite and ergonomic design, which bring user a fine operation
feel. The TC-620 is customized for logistics, warehousing, property management and service
industries because all TC-620 radios are approved to dust & water protection Class IP54 and
endowed with large speaker.
This easy-to-use radio will deliver you secure, instant and reliable communications at peak
efficiency. Please read this manual carefully before use. The information presented herein will
help you to derive maximum performance from your radio.
MODELS COVERED IN THIS MANUAL
TC-620 VHF Two-way Radio
TC-620 UHF Two-way Radio

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Safety and General Information
The following general safety precautions as would normally apply, which should be
observed during all phases of operation, service and repair of this equipment.
◇ Turn off your radio prior to entering any area with a potentially explosive atmosphere.
◇ Do not charge your battery in a potentially explosive atmosphere.
◇ Do not use any portable radio that has a damaged antenna. If a damaged antenna
comes into contact with your skin, a minor burn can result.
◇ This equipment should be serviced by qualified technicians only.
◇ To avoid possible interference with blasting operations, turn off your radio when you are
near electrical blasting caps. In a blasting area or in areas such as hospital site posted
“Turn off two-way radio”; when taking an airplane, please obey the “turn off two-way
radio” instruction of aircrew staff as well.
◇ For vehicles with an air bag, do not place a radio in the area over an air bag or in the air
bag deployment area. Air bags inflate with great force. If a radio is placed in the air bag
deployment area and the air bag inflates, the radio may be propelled with great force
and cause serious injury to occupants of the vehicle.
◇ Do not expose the radio to direct sunlight over a long time, nor place it close to heating
source.
◇ When using your radio, hold the radio in a vertical position with the microphone 3 to 4
centimeters away from your lips.
◇ If you wear a radio on your body when transmitting, ensure the radio and its antenna
are at least 2.5cm away from your body.

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Specifications
General
Frequency Range（MHz）VHF: 136-174MHz
UHF (1): 400-420MHz
UHF (2): 450-470MHz
UHF (3): 440-470MHz
Channel Spacing（KHz）Wide: 25 KHz / Narrow: 12.5KHz
Operating Voltage（V）7.5V DC
Antenna Impedance (Ω) 50Ω
VOX Level Adjustable 5 levels
Operating Temperature -20℃- +50℃
Reliability Meets GB/T15844-1995 Standard
RF Power Output（W）Hi: 4.5-5W / Lo: 2.0±0.3W
Audio Distortion Less than 5%
Reference Sensitivity (dBm) Wide: -119dBm /Narrow: -118dBm
Maximum Audio Power Output (W) More than 1.2W

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Product Inspection
Before unpacking the TC-620 portable radio, please inspect the packaging for signs of damage
and report any damage to your dealer.
Upon unpacking of the TC-620 portable radio, please ensure that all items shipped were
received, report any missing or damaged items to your dealer.
Item Qty. (PCS)
Antenna 1
Belt Clip 1
Screw 2
Strap 1
Battery 1
Charger 1
Adapter 1
Owner’s Manual 1
Note: 1. Frequency band is marked on the label of antenna, if not, identify the frequency band
according to the color circle, red indicates UHF, green indicates VHF. Please refer to the label
on the radio unit for detailed frequency band information.
2. The radio unit is shipped with screws mounted from the factory.

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Battery Adapter
Belt Clip Charger
Strap Screw
Antenna

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Getting Started
1
2
4
5
10
6 7 8 9
12
13
14
11
3
16
15
(1) PTT (Push-to-Talk)
key
(2) SK1 key (Side Key 1)
(programmable)
(3) SK2 (Side Key 2)
(programmable)
(4) Speaker
(5) Microphone (6) Antenna (7) LED Indicator (8) Channel Selector Knob
(9) Radio On-Off
/Volume Control Knob
(10) Battery Latch (11) Accessory Jack (12) Accessory cover
(13) Belt Clip (14) Battery (15) Screw (16) Electrode Piece
* PTT (Push-to-Talk) Key
Press and hold down the PTT key to transmit, release it to receive.
*SK1 (Side Key 1)
Side Key 1 is the programmable key that can be assigned with long press function and short

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press function by your dealer. See Glossary for definitions of short press and long press.)
*SK2 (Side Key 2)
Side Key 2 is the programmable key that can be assigned with long press function and short
press function by your dealer. (See Glossary for definitions of short press and long press.)
*LED indicator
Status of LED indicator and alert tone see table below (See Functions and Settings for the
detailed operations):
Power up in user mode
When the radio is turned on, the power up alert tone
is heard.
When the current channel is a blank channel, the
radio sounds Beep tone continuously.
Low battery alert
LED flashes red, and a low-pitched tone sounds at
intervals of 10 seconds.
Transmitting
LED glows red when transmitting
When TOT timer expires, the radio sounds Beep tone
continuously.
TOT pre-alert: a Beep is heard.
Receiving LED glows green when carrier is present.
Scanning
Green LED flashes at every 1 second, while scanning
is in process.
Scan Start Alert Tone (programmable by your dealer):
a Beep is heard.
Scan Exit Alert Tone (programmable by your dealer):
a Beep is heard.
Priority Channel Scan Alert Tone (programmable by
your dealer): when scanning, if the current channel is
the priority channel, the radio sounds a Beep.
Power adjust
A low-pitched tone is heard when transmit power is
adjusted from high power to low power.

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A high-pitched tone is heard when transmit power is
adjusted from low power to high power.
VOX
A high-pitched tone is heard when the VOX feature is
activated.
A low-pitched tone is heard when the VOX feature is
disabled.
*Channel Selector Knob
Rotate the knob to select from channel 1 to 16.
* Radio On-Off/Volume Control Knob
Rotate the knob clockwise to turn the radio on, rotate the knob fully counter-clockwise until a
“click” is heard to turn the radio off.
Turn the knob clockwise to increase the volume, or counter-clockwise to decrease the
volume.
*Battery latch, used to remove the battery.
* Accessory Jack
The jack is used to connect speaker, microphone, external PTT, earpiece, programming
cable and cloning cable.
Battery Information
Safety Precautions
The optional battery is shipped uncharged from the factory. Please charge a new battery or
battery that has not been used for a long time prior to use. The maximum capacity of the battery
is achieved only after 2 or 3 charging and discharging cycles. When the battery power runs low,
please recharge the battery or replace with a refresh one.
Applicable Battery Packs
To reduce the risk of injury, charge only the battery specified by the manufacturer. Other
batteries may burst, causing bodily injury and damage.
Caution:
1. Do not short circuit the battery terminals or discard the battery in fire. Never attempt to

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disassemble the battery.
2. The battery should be charged at 5 ~ 40 , temperature out of this range could result the℃℃
battery not fully charged.
3. When charging a battery attached to a radio, turn the radio off to ensure a full charge.
4. Do not cut off the power supply or remove the battery when charging a battery.
5. If the operation time will not increase even though the battery is properly charged, this
means the battery life cycle is over, please replace with a new one.
6. Do not return fully charged batteries to the charger for an “extra boost”. This action will
significantly reduce battery life.
7. Never charge a battery that is wet. Please dry it with soft cloth prior to charge.
All batteries can cause property damage and/or bodily injury such as burns if a conductive
material such as jewelry, keys, or beaded chains touch exposed terminals. The conductive
material may complete an electrical circuit (short circuit) and become quite hot. Exercise care in
handling any charged battery, particularly when placing it inside a pocket, purse, or other
container with metal objects.
Charging Operation
If the battery is assembled to the radio, its LED indicator flashes red and sounds falling tone 10
seconds per time, which indicates that the battery power is low and please charge the battery by
the HYT approved charger. The charger’s LED indicates the charging progress.
Status Charger LED Remarks
Standby (no-load) Red LED flashes slowly (0.2s on/3s off ) Intelligent rapid-rate
charger only
Battery is charging Red LED solidly glows
Battery is fully
charged
Green LED solidly glows
Error Red LED flashes rapidly (0.2s on/0.2s
off)
Intelligent rapid-rate
charger only
Charging please refer to the following procedure:

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1. Plug the DC connector of the adapter into the DC socket on the back of the charger.
2. Place the radio with the battery attached, or the battery alone, in the charger.
3. Plug the AC connector of the adapter into the AC outlet socket.
4. Make sure the battery is in well contact with the charging terminals, the charging process
initiates when the red LED lights.
5. The greed LED lights about 3 hours later indicating the battery is fully charged. Then remove
the radio with the battery attached or the battery alone from the charger.
Note:
a) It is normal that the LED flashes before placing the battery into the charger.
b) Do not place another battery into the charger until the charger LED is stabilized.
c) After the battery is placed properly, the LED solidly glows red indicating the battery is
charging, or flashes indicating the battery is damaged or the ambient temperature is
over high/low.

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Antenna Information
Stubby antennas are ideal for communication within limited range. Fine and long
antennas optimizes communication coverage, ideal when the radio is worn on the belt
because they are flexible and soft.
Rainy days or forest locations may narrow your communication range, please prepare
in advance to avoid potential inconvenience.
Assembly and Disassembly
Attaching the Battery
1. Hold the battery and make it attached close to the top of aluminum chassis, see figure 1.
(Note: insert the tab on the top of battery into the top of battery slot).
Figure 1
2. Lightly press the bottom of the battery until a “click” is heard. By then, the battery latch locks
with the main unit and assembly is finished. See figure 2 below:
Note: if the battery is not well locked, please remove the battery and attach it again.

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Figure 2
Removing the Battery
1. Please turn off the radio first. Then hold the top of radio main unit and press belt clip to
make its tail turn up. Lift the battery latch in the direction of the arrow. See figure 3.
Figure 3
2. When the bottom of battery is turned up, release the battery latch and take out from the
battery slot, see figure 4 below. (Note: when battery is turned up, the angle between battery
and main unit can not be too large to cause serious abrasion of the tab in the top of
battery.)

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Figure 4
Attaching the Antenna
1. Insert the antenna to the big screw thread hole on the top of main unit.
2. Turn the antenna clockwise until it is screwed down, shown as figure 5.
Figure 5
Removing the Antenna
When disassembling antenna, turn the antenna counter-clockwise until it is loosen and screwed
out, shown as figure 6.

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Figure 6
Attaching the Belt Clip
Loose the screw of belt clip from the main unit, fasten the belt clip to the main unit (make sure
the screw holes of belt clip and of aluminum chassis is aligned), clockwise screw down the belt
clip. (See figure 7 below).
Figure 7
Removing the Belt Clip
Turn the screwdriver counter-clockwise to loosen the screw. Please refer to the operations for
attaching the belt clip. See figure 8 below.

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Figure 8
Attaching the Earpiece/Microphone
1. Open (not remove) the accessory cover, shown as figure 9:
Figure 9
2. Plug the audio accessory firmly into the accessory jack, then secure the screw, shown as
figure 10.

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Figure 10
Removing the Earpiece/Microphone
Loosen the screw and then remove the audio accessories.
Note: Using the radio with audio accessory may affect the waterproof performance of the radio.
General Radio Operations
Note: See Glossary for definitions of relevant words.
Turn the Radio On/Off
Turn the radio on-off /volume control knob clockwise to turn on the radio, then radio sounds an
alert tone. Turn the radio on-off /volume control knob counter-clockwise to turn off the radio.
(See figure 1 below)
Figure 1

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Adjust the Volume
Press the programmable key set as Squelch Off / Squelch Off Momentary to listen the
background noise, then turn the volume control knob clockwise/counter-clockwise to
increase/decrease the volume. See Glossary for definition of Squelch.
Figure 2
Select a Channel
Turn the channel selector knob to select a channel. See figure 3 below.
Figure 3
Transmitting
To transmit, press and hold down PTT key and talk to microphone to speak. Ensure the radio is
2.5 to 5 centimeters away from your lips.

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Receiving
To receive signal, release the PTT key.
Talk Range:
Flat ground with no obstructions Up to 10 kilometers
Residential area (close to buildings）Up to 5 kilometers
Inside multi-level buildings Up to 20 floors
Programmable Auxiliary Functions
Your dealer may program the TK, SK1, SK2 (long or short press) keys with one of the following
auxiliary functions respectively. See Functions and Settings for the detailed description.
zNone
zPower Adjust
zBattery Power Indicator
zSquelch Off (See Glossary for definitioins of Steady and Squelch Off.）
zSquelch Off Momentary
zMonitor
zMonitor Momentary（See Glossary for definitioins of Momentary and Monitor）
zScan（See Glossary for definitioin of Scan.）
zVOX

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Functions and Settings
The following functions are programmable by your dealer.
CTCSS/CDCSS
Set up talkgroups with unique CDCSS/CTCSS to prevent unwanted conversations on the same
frequency. See Glossary for definitions of CTCSS and CDCSS.
If CTCSS/CDCSS is set on the current channel, CTCSS/CDCSS match is required for the radio
to unmute to an incoming signal. If CTCSS/CCSS is not set, the radio can receive calls from all
users operating on the same frequency. Your dealer may set CTCSS/CDCSS for some
channels.
This feature does not mean that your conversation will not be heard by others. Radios that set
with the same CTCSS/CDCSS, or no CTCSS/CDCSS, can receive from you.
Battery Save
This feature can be enabled by your dealer. The Battery Save feature is automatically activated
once no activity on the channel and no operation performed (no key press and no knob
selection), for extended operation time.
Pressing any key or receiving a signal will restore the radio to normal operation and exit from
Battery Save.
See Glossary for the definition of Battery Save.
Power Adjust
A press of the programmed Power Adjust key switches the transmit power level between high
and low power.