TECSUN TECSUN

PL-680

PLL SYNTHESIZED RECEIVER

FM STEREO / MW / LW / SW-SSB / AIR BAND

OPERATION MANUAL

TECSUN ELECTRONIC IND. LTD.

Address: Rm 11, 13/F, Block A, Hoi Luen Ind. Ctr.,

55 Hoi Yuen Road, Kwun Tong, Kowloon, Hong Kong.

E-mail: [email protected]

Website: www.tecsun.com.cn

20150116

TECSUN ELECTRONIC IND. LTD.

FEATURES

FM-stereo/MW/LW/SW/SW SSB/AIR band with high sensitivity, selectivity and user-friendliness

FM band coverage: 76 – 108 MHz

Shortware Single Side Band (SSB) with upper sideband (USB) and lower sideband (LSB)

Equipped with Synchronous Detector and Dual Conversion technology for MW band; this greatly enhances the receiver’s sensitivity, selectivity, image rejection, and interference from adjacent stations

FM/SW external antenna jack sensitivity selector: DX/Normal/

Local antenna gain

Multiple tuning methods

Store up to 2000 stations (manually, semi-automatic and fully automatic)

Equipped with a high-sensitivity acoustic speaker with treble/bass tone control switch (FM-stereo via earphone)

Auto Alarm-Off Timer: when the alarm goes off, the preset radio station will play for 1-90 minutes

Sleep timer (1-120 minutes) to turn off the radio automatically

User-friendly interface

Built-in charging function

Powered by 4 x AA (R6) size batteries, DC 6V

Luxury carrying case

Dimensions: 188 x 116 x 31 mm

SPECIFICATIONS

8. Station Memory 2000M in total

800 memories for each band:

FM: 100M

MW: 100M

LW: 100M

SW: 200M

SSB: 200M

AIR: 100M

1200 memories for 12 memory pages (each page 100 memories)

9. Alarm Mode: alarm by radio only (2 presettings)

10. Quiescent Current

FM ＜ 50mA

MW/LW ＜ 70mA

SW ＜ 70mA

SSB ＜ 70mA

AIR ＜ 70mA

Standby ＜ 80uA

11. Speaker: Φ77 mm / 16 Ohm / 1W Cone speaker

12. Earphone Jack: Φ3.5mm, 32 Ohm, Stereo type

13. Power supply:

Battery: UM3 or AA X 4

External adaptor: DC 6V, ≥ 300mA

14. Unit Dimensions: approx. 188(W) X 116(H) X 31(D) mm

15. Weight: 475g (Batteries not included)

PL-680 25

TABLE OF CONTENTS

CONTROL LOCATIONS...................................................................................... 2

LCD DISPLAY .......................................................................................................

4

HOW TO TURN ON/OFF THE RADIO.................................................................5

TUNING INTO STATIONS....................................................................................6

Manual Station Tuning

Auto Browse Station

Direct Keypad Entry

WORKING WITH STATION MEMORIES.............................................................8

Storing Stations Manually

Semi-Automatic Station Storage

ATS (Auto Tuning Storage)

Memory Tuning Manually

Auto Browse Memory

Direct Key in Memory Address

Delete Single Memory Manually

Semi-Auto Delete Memory

Delete ALL Memories within a Page

LISTENING TO STORED STATIONS................................................................12

SLEEP FUNCTION............................................................................................13

TIME SETTING..................................................................................................13

ALARM SETTING..............................................................................................14

SETTING ALARM STATION

SETTING THE ALARM TIME

SNOOZE FUNCTION........................................................................................15

INTELLIGENT LIGHT FUNCTION.....................................................................15

TUNING STEP SETTINGS................................................................................16

FM ST. (FM STEREO).......................................................................................16

AM BW (BANDWIDTH) ......................................................................................17

ANT. GAIN..........................................................................................................17

TONE CONTROL...............................................................................................17

KEY-LOCK FUNCTION......................................................................................17

INTELLIGENT CHARGING FUNCTION ............................................................18

SINGLE SIDE BAND (SSB)...............................................................................18

SYNCHRONOUS DETECTOR ..........................................................................19

HOW TO IMPROVE FM / SW RECEPTION......................................................19

SYSTEM SETTINGS ......................................................................................... 20

RESET PROCEDURE........................................................................................21

IMPORTANT MATTERS FOR USING BATTERIES...........................................21

TROUBLE SHOOTING......................................................................................22

SPECIFICATIONS..............................................................................................23

PL-680 1

CONTROL LOCATIONS

2 PL-680

1

2

3

4

5

Power / Sleep button

Time set button

Timer A Alarm set button

Timer B Alarm set button

FM & SW Telescopic Antenna

6

7

8

Light / Snooze / Step button

VF / VM / SCAN

-/+ PAGE buttons

9

10

Air Band button

Single Side Band (SSB) button

11

12

Synchronous (SYNC) button

FM. ST & AM BW select button

13

14

FM / AM (MW, LW) / SW Band & ATS buttons

Delete / Enter button

15 Key lock button

16

17

Memory / Battery button

Hand Carry Strap

18 FM / SW Antenna Jack

19 ANT. Gain (DX / Normal / Local) switch

20 Treble / Bass Tone Control

21 Earphone Jack

22 DC 6V Jack

23

24

Metal Stand

Tuning Knob

25 SSB BFO knob

26 Volume knob

27 Reset button

Note: For the silk-printing in red or orange on radio with brackets,

it means that you can only operate it when radio is off.

PL-680 3

LCD DISPLAY

4

19

18

17

1 2 3 4 5 6 7

Ni-MH

Battery

0 1 2 3 4 5

SL EEP

Timer A

Timer B

Charge

AIR

FM MW LW Shortwave BW

PAGE

FAST

SLOW kHz

MHz

A

PRESET

SYNC

B mb

8

9

10

11

16 15 14 13 12

1

2

Battery Consumption indicator

“ ” : Full

“ ” : Empty

Signal Strength indicator

1 2 3 4 5

1 2 3 4 5

6

7

4

5

10

11

12

13

3

8

9

14

15

16

17

18

19

Digital Number Display:

With radio off: Time & System settings

With radio on: Frequency or Error display

Sleep timer indicator

Alarm Timer A or B – Timer indicator

Charging Indicator

Digital Number Display:

With radio off: preset alarm time and charging time

With radio on: time, page & memory address, SW meter band displays.

SW meter band indicator

PAGE: Memory Page number

PRESET: Memory Address number

Alarm Timer A or B - On/Off indicator

Key-Lock indicator

Synchronous band detection

Single Side Band (SSB) indicator

USB: Upper Side Band

LSB: Lower Side Band

Tuning Speed:

Slow: Slow Tuning

Fast: Fast Tuning

KHz: frequency unit for MW, LW & SW

MHz: frequency unit for FM

AM Band width indicator

: AM Wide band

: AM Narrow band

FM, MW,LW and SW Band indicator

FM Stereo indicator

Air Band indicator

Ni-MH Rechargeable Battery indicator

PL-680

HOW TO TURN ON/OFF THE RADIO

1. Open the battery compartment located on the back of the unit; install 4 x UM3 AA size batteries observing the battery polarity diagram on the back of the radio. Close the battery door.

Connect the unit to the regulated power supply.

+

2. Press the [POWER] button to turn on the radio.

Press

Note:

If the radio is unable to power on, please check if the batteries are installed correctly, battery capacity is sufficient, and the key lock function is turned off; to deactivate the key lock function press & hold the [ ] button.

Long press the power button to adjust the sleep timer setting.

PL-680 5

TUNING INTO STATIONS

Press the [POWER] button to turn on your radio, then select your desired band by pressing [FM], [AM], SW [ ] / [ ], or [AIR] button.

In case of receiving FM/AIR/SW broadcasting, fully extend the telescopic antenna for a better reception. When receiving MW and

LW broadcasting, please rotate the radio or change its location to achieve optimum reception. You can rotate the [VOLUME] knob to adjust to an appropriate volume.

Now, you can turn into your favorite stations with any of the below tuning methods:

METHOD 1: MANUAL STATION TUNING

Press the [VF/VM] button to enter the frequency mode (VF), the frequency display flashes twice. Now rotate the

[TUNING] knob to select your desired station.

Ni-MH

Battery

0 1 2 3 4 5

FM

SL EEP flashing

MHz

Frequency mode

METHOD 2: AUTO BROWSE STATION

1. Press the [VF/VM] button to enter the

frequency mode (VF), the frequency

display flashes twice.

2. Press & hold the [VF/VM] button to

browse to the next available station,

pre-listening the station for five

seconds before continuing to browse.

3. To stop the auto browse function,

simply rotate the [TUNING] knob or

press on the [VF / VM] button again

to confirm on your desired station.

Searching

Frequency

Ni-MH

Battery

0 1 2 3 4 5

SL EEP flashing

FAST

MHz

FM

Auto browse station

Notes:

1. While operating the “Auto Browse Station” function, you can press

the [MEMORY] button anytime to store the station into memory,

and the radio will keep on auto browsing the next available

station.

2. The "Auto Browse Station" function is not available for Air Band

and SW SSB frequencies.

6 PL-680

TUNE IN STATIONS

METHOD 3: DIRECT KEYPAD ENTRY

1. Press the [VF/VM] button to enter the frequency mode (VF), the

frequency display flashes twice.

2. Press the numeric keys [0] - [9] to enter the station frequency

directly.

Notes:

1. Ignore the decimal point for FM band when inputting the

frequency numbers. For example, FM 89.3 MHz, just enter

8 9 3 .

2. If the entered frequency is not within the covered range, an error

symbol " " is displayed.

PL-680 7

WORKING WITH STATION MEMORIES

The PL-680 has 2000 station memories, which are organized over

12 memory pages.

1. Memory PAGE 0, noted as [P0], consists of 800 memories, 100

assigned for FM/MW/LW, 200 for SW & SSB and 100 for AIR

BAND.

2. Memory PAGE 1~12, noted as P1, P2, etc., each page consists of

100 memories, in total 2000 memories.

BAND

MEMORY

FM

MW

LW

SW

SSB

AIR

Memory for each Band ( 800)

PAGE P0

100

100

100

200

200

100

ATS

Memory among all Band (1200)

PAGE 01 -12

Each Memory

Page can store

100 Memories.

ATS

ATS is available for all Memory

Pages (except

Air Band)

METHOD 1: STORING STATIONS MANUALLY

1. Press the [FM], [AM] (for MW and LW) or [SW] button for band

selection, then tune into your desired station.

2. Press the [MEMORY] button; the next available memory position

flashes.

3. Rotate the [TUNING] knob to specify your preferred memory

position.

4. Press the [MEMORY] button again to confirm. You can also wait

for 3 seconds to auto store the station into memory.

NOTE: To store the station in a different memory page, press the

[ - PAGE + ] button.

METHOD 2:

SEMI-AUTOMATIC STATION STORAGE

While operating the “Auto Browse

Station” (refer to page 06) function, you can simply press the [MEMORY] button to store the station into memory to avoid unwanted stations.

Ni-MH

Battery

0

Searching

Frequency

FM

1 2 3 4 5 flashing

FAST

MHz

Auto browse station

8 PL-680

WORKING WITH STATION MEMORIES

METHOD 3: ATS (AUTO TUNING STORAGE)

FM ATS:

1. Fully extend the telescopic antenna

and press the [FM] button to select

FM band.

2. To automatically store all available

stations, press & hold the [FM] button;

Ni-MH

Battery

0 1 2 3 4 5

SL EEP

PAGE

"PRESET" will flash in the top right

corner of the display while the frequency

FM

starts running. The frequency stops running once the ATS

MHz flashing

PRESET

operation has completed. Rotate the [TUNING] knob to browse

all stored FM stations.

MW/LW ATS:

1. Press the [AM] button to select MW/LW band.

2. Press & hold the [AM] button to perform ATS on the MW or LW

band.

SW ATS:

Fully extend the telescopic antenna and press the SW [ ] or [ ] button to select SW band. There are two modes for SW ATS tuning:

Mode A: Press & hold the [ ] button to ATS the stations within all

meter bands

Mode B: Press & hold the [ ] button to ATS the stations within

present meter band only.

Notes:

1. While performing ATS in FM, MW/LW or SW (mode A) bands,

previously stored stations are replaced by the newly found

stations.

2. While performing ATS in SW (mode B) band, previously stored

stations are not replaced. Instead, all newly found stations are

stored in blank memory positions.

3. If the surrounding area has too much interference or many

mirror/blank stations are stored during ATS, try to contract the

telescopic antenna (for FM and SW) or rotate the radio (for MW

and LW). Also try to push the [ANT. GAIN] switch into "NORMAL"

or "LOCAL" position. Then perform ATS again.

PL-680 9

WORKING WITH STATION MEMORIES

DELETE MEMORY

Press the [VF/VM] button to enter the memory mode; the memory address shows in the upper right corner of the display.

METHOD 1: DELETE SINGLE MEMORY

Rotate the [TUNING] knob to select the memory that you want to delete, press & hold the [DELETE] button with “ ” flashing; then press the

[DELETE] button to remove the unwanted memory address.

Ni-MH

Battery

0 1 2 3 4 5 flashing

PAGE PRESET

Note: Delete Single Memory

If “ " is flashing more than 3 seconds without confirmation, it will exit the delete function automatically.

METHOD 2: SEMI-AUTO DELETE MEMORY

Press and hold the [VF / VM] to auto browse stations, then you can press the [DELETE] button anytime to direct delete the unwanted station; the radio will keep on auto browsing the next available station until you press any other button to stop this function.

METHOD 3: DELETE ALL MEMORIES WITHIN A PAGE

Press & hold the [DELETE] button for

3 seconds and notice both “Memory flashing address” & “ ” flashing, then follow with “Memory Page” and “ ” flashing on the upper right corner of display.

Press the [DELETE] button again to delete all memory within the selected

Ni-MH

Battery

0 1 2 3 4 5

PAGE PRESET page.

Delete ALL Memory

Note:

If the [DELETE] button has not been pressed within 3 seconds to confirm, it will exit the delete function automatically.

10 PL-680

WORKING WITH STATION MEMORIES

AUTO SORTING MEMORY

To sort all stored stations automatically, turn the device off, then press and hold the [ ] button for 2 seconds until the memory page number in the upper right corner starts running.

This function is able to:

1. Remove duplicate stations. Especially useful after storing stations manually, as you might store a station more than once.

2. Sorting the sequence of stored stations.

– In page P0, select your desired band to find all stored stations in

sequence of frequency (from low to high).

– In page 01-12, all stored stations are sorted in band sequence

(FM, SW, MW, Air band, LW) and placed in sequence of frequency

(from low to high).

PL-680 11

LISTENING TO STORED STATIONS

Select the band of your desired station, then press the [VF/VM] button to enter the memory mode; the memory address shows in the upper right corner of the display. Press the [- PAGE +] button to select the memory page in which to search for stored stations using any of the below memory tuning methods.

Ni-MH

Battery

0 1 2 3 4 5

MW

SL EEP

BW flashing

PAGE kHz

PRESET

Changing memory pages

METHOD 1: MANUAL MEMORY TUNING

Rotate the [TUNING] knob to tune around the stored stations.

METHOD 2: AUTO BROWSE MEMORY

Press & hold the [VF/VM] button to browse to the next stored station, pre-listening each station for five seconds before continuing to browse.

Ni-MH

Battery

While browsing, "PRESET" flashes on the display. To stop browsing, rotate the [TUNING] knob or press the

[VF/VM] button again.

0

FM

1 2 3 4 5

SL EEP

PAGE

MHz

Auto browse memory

PRESET flashing

METHOD 3: DIRECT KEY IN MEMORY ADDRESS

Press the numeric keys [0] - [9] to enter the memory address directly, and then press the button to confirm.

Note: If the display shows “ ” symbol after entering the number, it means the entered memory page/address does not exist.

12 PL-680

SLEEP FUNCTION

1. In POWER OFF mode, press &

hold the [POWER] button untill

SL EEP the sleep timer symbol " "

flashes on the display.

flashing

Ni-MH

Battery

0 1 2 3 4 5

SL EEP

2. Rotate the [TUNING] knob

immediately to select a sleep

timer from 1 - 120 minutes or

select " " for POWER ON

mode (the radio will be turned

on after 1 second).

Time selection for sleep timer

Note: The default setting of the sleep timer is "ON ".

TIME SETTING

1. Press & hold the [TIME] button until

the hours indicator starts flashing.

Rotate the [TUNING] knob to adjust

the hours, or directly input the time

by pressing the [ 0 – 9 ] numeric keys.

2. While the hours indicator is flashing,

press the [TIME] button again to

select the minutes indicator.

Rotate the [TUNING] knob to adjust

the minutes, or directly enter it by

pressing the [0 – 9] numeric keys.

3. Short press the [TIME] button to confirm,

or wait for 3 seconds to automatically

confirm the time setting.

Ni-MH

Battery flashing

Timer A

Time setting

PL-680 13

ALARM SETTING (By Radio only)

SETTING THE ALARM STATION:

1. Turn on the radio, then tune into your favorite station and adjust

your desired alarm volume level.

2. Press the [MEMORY] button and then immediately press the

flashing on the display to confirm the preset alarm station.

SETTING THE ALARM TIME

1. Press & hold the [TIMER A] button

until the hours indicator starts

flashing in the upper right corner of

the display. Rotate the [TUNING]

knob to adjust the hours, or directly

enter the alarm time by pressing the

[ 0 – 9 ] numeric keys.

2. While the hours indicator flashes,

press the [TIMER A] button to select

the minutes indicator. Rotate the

[TUNING] knob to adjust the minutes,

or directly enter it by pressing the

[ 0 – 9 ] numeric keys.

3. Press the [TIMER A] button again,

then rotate the [TUNING] knob to

select from 1 - 90 minutes to set the

"Alarm Off Timer". This is the time

duration after which the radio will be

turned off automatically.

Ni-MH

Battery flashing

SL EEP

Timer A

A

Setting timer for alarm off

4. Press the [ALARM] button to confirm

the setting or wait for 3 seconds, the

unit will automatically confirm the

alarm setting.

Note: Follow the above instructions using the [TIMER B] button to

set a second alarm.

14 PL-680

SNOOZE FUNCTION

When the alarm goes off, press the [LIGHT/SNOOZE] button to temporarily turn off the alarm. The alarm will go off again after 5 minutes.

Notes:

1. To turn off/on the alarm, press the [TIMER A] or [TIMER B] button;

2. When the alarm goes off, press the [POWER] button once to

deactivate the "Alarm Off Timer"; press it twice to turn off the

radio.

3. If the preset alarm is activated when you are listening to the radio,

it will automatically switch to that station when the alarm goes off.

INTELLIGENT LIGHT FUNCTION

This device has an intelligent backlight function, meaning the backlight is lid for about 5 seconds after operating any keys or knobs.

TURN ON/OFF THE BACKLIGHT:

Press the [LIGHT/SNOOZE] button to illuminate the LCD for 30 seconds. Press it again to turn off the backlight.

Notes:

1. When the unit is powered by batteries, to reduce power

consumption, please try to avoid setting the backlight to 30-

seconds illumination.

2. When the unit is turned off, the 30-seconds illumination function is

turned off as well.

PL-680 15

TUNING STEP SETTINGS

There are three tuning step speed settings: slow, fast, and intelligent (slow & fast). In Frequency Mode (VF), press & hold the [STEP] button to select your preferred setting. flashing

The intelligent tuning step notices when you rotate the [TUNING] knob in a slow or fast way. When rotating fast, the tuning steps will be larger.

NOTE: intelligent tuning step is not available for Air Band.

Long-press

BAND

TUNING

STEP

FM

MW

LW

SW

AIR

SLOW TUNING STEPS

Slowly rotate the [TUNING] knob

0.01 MHz

1kHz

1kHz

1kHz

1kHz

FAST TUNING STEPS

Quickly rotate the [TUNING] knob

0.1MHz

9kHz / 10kHz

9kHz

5kHz

25kHz

FM ST. (FM STEREO)

1. When listening to radio broadcastings through stereo earphones,

press the [FM.ST] button to activate the stereo function; the " "

symbol appears on the display. If the FM signal is too weak, it is

advised to turn off the stereo function by pressing the [FM ST.]

button again; the " " symbol disappears.

2. When listening to FM stereo through a speaker, it is advised to

turn off the stereo function to improve sound quality.

3. The stereo function will not be activated and the " " symbol

will not appear if the FM station is not in stereo broadcasting.

16 PL-680

AM BW (BANDWIDTH)

Press the [AM BW] button to select your desired bandwidth for MW,

LW, SW, and SSB.

Wide Band

It has better audio fidelity when receiving strong signals or local stations.

Narrow Band

It is suitable to receive weak and long distance stations as the narrow band is able to limit the interference from adjacent strong signals and reduce background noise.

ANT. GAIN

Ni-MH

Battery

0 1 2 3 4 5

SL EEP

Shortwave BW kHz

AM Bandwidth Indicator

While listening to SW, push the

[ANT.GAIN] switch to "DX" position for normal listening. For stations with a strong signal or strong electrical interference, push the [ANT.GAIN] switch to either

"NORMAL" or "LOCAL" to achieve better sensitivity.

TONE CONTROL

ANT. GAIN

DX

NORMAL

LOCAL

TONE

TREBLE

BASS

Push the [TONE] switch upward for “TREBLE” listening, downward or “BASS” tone.

KEY LOCK FUNCTION

To activate the key lock function, press & hold the [ ] button; the " " symbol appears on the display.

Press & hold the [ ] button again to unlock.

PL-680 17

INTELLIGENT CHARGING FUNCTION

In power off mode, install 4 x UM3 (AA size) rechargeable (Ni-MH) batteries to activate the built-in charging function. Connect the external adaptor to start charging the batteries. The symbol " " will advance from down to up while charging. It stops when the batteries are fully charged.

When using non-rechargeable batteries, please turn off the charging function; press & hold the [BATTERY] button, the " " symbol disappears from the display.

Notes:

1. Before using new Ni-MH rechargeable batteries for the first time,

please charge them overnight. This will increase battery life.

2. Do not use batteries of different capacities at the same time.

3. Do not try to charge non-rechargeable batteries. This will damage

both the batteries and the device.

4. Please do not use an external adaptor with a different voltage, this

will damage the device.

5. When charging, if the external power adapter and the battery cover

become hot, this is normal.

SINGLE SIDE BAND (SSB)



1. In Shortwave mode, press the [SSB] button repeatedly to select

Upper Side Band (USB) or Lower Side Band (LSB).

“ USB” showing on the display indicates USB selection.

 “ USB” and “LSB” disappearing means switching to SW.

2. Enter the SSB frequency directly by pressing the numeric keys

[0 – 9].

3. Then fine tune the [SSB BFO] knob to achieve better sound fidelity.

18 PL-680

SYNCHRONOUS DETECTOR

When receiving AM broadcasting, if there is interference from adjacent strong signals, you can activate the SYNC function to improve the reception.

optimum reception.

2. To deactivate the SYNC function, press the [SYNC] button until

Notes: If the "SYNC" symbol keeps flashing, this indicates that the

radio signal is too weak or the frequency is deviant. It is

recommended to deactivate synchronous detection as it is

unable to function properly.

HOW TO IMPROVE FM / SW RECEPTION

Use the external wire antenna to plug into the [FM & SW ANTENNA] jack, then position the opposite end outside the window for better FM and SW reception.

external antenna for FM & SW

Window wall

FM & SW ANTENNA

Caution: Do not place the external antenna outdoors during a thunderstorm!

PL-680 19

SYSTEM SETTINGS (In Power Off Mode)

SETTING FM FREQUENCY RANGE:

Press & hold the [FM SET] button until 88-108MHz, 76-108MHz or 87-108MHz appears on the display. Press the [FM SET] button to select a suitable frequency range for FM.

TURN ON/OFF THE LW:

To turn ON/OFF LW, press & hold the [LW ON/OFF] button until "LW

ON" or "LW OFF" appears on the display.

SETTING MW (AM) TUNING STEP:

To select your desired AM tuning steps, press & hold the [9/10kHz] button until "9kHz" or "10kHz" appears on the display.

TURN ON/OFF THE INTELLIGENT LIGHT FUNCTION

The Intelligent Light Function is activated by default, which will illuminate the backlight for 5 seconds after operating any button or knob. To deactivate, press & hold the [LIGHT SET] button until "OFF" appears on the display; repeat the operation to reactivate.

Note: After deactivating the Intelligent Light Function, the

[LIGHT/SNOOZE] button can still be used to turn on/off the

back light.

TURN ON/OFF THE CHARGING FUNCTION

Using Regular Batteries for power supply:

In radio off mode, press & hold the [BATTERY] button until "CHA

OFF" is shown on the display. When the charging mode is deactivated, "Ni-MH Battery" does not appear below the battery consumption indicator.

Using Rechargeable Batteries for power supply:

In radio off mode, press & hold the [BATTERY] button until "CHA ON" is shown on the display. When the charging mode is activated,

“Ni-MH Battery" appears below the battery consumption indicator.

Note: The default setting is for using rechargeable batteries. For a

correct battery power indication when using regular batteries,

deactivate the charging function.

20 PL-680

RESET PROCEDURE

If not functioning properly, you can reset the device by sticking a pointed object (such as a straightened paper clip) into the reset hole and gently press the [RESET] button.

Note: Resetting the device will not delete any station memories.

IMPORTANT MATTERS FOR USING BATTERIES

1. When the device is not powered by batteries or the adaptor for a

long time, the clock setting is lost, but the stored radio stations

are saved.

2. When battery power is low, the " " symbol starts flashing to

alert you to charge the batteries or change to new ones. The

device turns off automatically when all power is gone.

3. Do not mix new and used batteries, this may damage the radio

and display an incorrect power capacity.

4. In order to avoid leakage, always remove the batteries when the

unit will not be used for a long period of time.

PL-680 21

TROUBLE SHOOTING

QUESTIONS ANSWERS SOLUTIONS

Cannot turn on the radio.

- Batteries have no

power

- Batteries are installed

incorrectly.

- Key lock function is

activated.

- Replace all batteries with new ones.

- Take note of the correct

polarity direction, then

reinstall the batteries.

　

- Press the [ ] button

to deactivated it.

Radio turns off while listening.

- Batteries have no

power

- Sleep timer is

activated.

- Replace or charge all

batteries.

-Turn the radio on again.

During ATS, some stations cannot be stored.

Some stored stations have noise.

- Frequency of stations

is too weak.

- There is interference

near by your area.

- Search the station

manually.

- Contract the antenna or

move to other location

and try again.

Only few FM stations can be received.

- FM frequency may

have been set to

76 - 90MHz

accidentally.

- Turn off the radio, press

& hold the [FM SET]

button to select the

accurate FM frequency

range.

Poor AM reception in

USA.

- USA uses 10kHz AM

tuning steps, the

device may still be set

to 9kHz.

- Turn off the radio

press the [9/10kHz]

button to select

accurate tuning step.

The sound of SW

SSB broadcasting is too low.

The default bandwidth is Narrow band.

Press the [AM BW] button to select the Wide band.

22 PL-680

TROUBLE SHOOTING

QUESTIONS ANSWERS SOLUTIONS

When the alarm goes off, there is only noise in the broadcasting.

-Did not set the proper radio station for the alarm.

-Or there is no

broadcasting at that

frequency.

-Preset your alarm

station properly

-Make sure it is possible

to receive radio

broadcastings at your

location.

The charging time becomes shorter and shorter.

The rechargeable batteries are getting old.

Replace the old rechargeable batteries with new ones.

Radio malfunction.

There may be some form of interference, causing the microchip to not function properly.

Remove the batteries.

Reinstall the batteries once the device's display has turned off completely.

If the device is still not working, please press the reset button with a pointed object.

PL-680 23

SPECIFICATIONS

1. Frequency Range:

FM: 76~108 / 87~108 MHz Step: 0.01MHz /0.1 MHz

MW: 522~1620 / 520~1710 kHz

Tuning Step: 9K for North America or other countries/10K for South America

LW: 100~519 kHz Step: 1 kHz/ 9 kHz

SW: 1711~29999 kHz Step: 1 kHz/ 5 kHz

AIR:118~137MHz Step: 1kHz / 25 kHz

2. Sensitivity

FM (S/N=30dB) Less than 3uV

MW (S/N=26dB) Less than 1mV/m

LW (S/N=26dB) Less than 5mV/m

SW (S/N=26dB) Less than 20uV

SSB(S/N=10dB) Less than 1uV

AIR (S/N=10dB) Less than 5uv

3. Selectivity

FM ＞ 30 dB (±200kHz)

MW/LW ＞ 40 dB (±9kHz )

SW ＞ 40 dB (±5kHz

4. S/N Ratio

FM Less than 60dB

MW/LW Less than 45dB

SW Less than 50dB

5. AM Frequency

SSB, AM 1st IF: 55.845MHz

2nd IF: 455 kHz

FM: 10.7MHz

6. FM Stereo crosstalk Less than 20 dB

7. Output Power

Speaker ≥ 450 mW

　 Earphone ≥ 10 mW

24 PL-680