Jensen MR-720 User Manual

Please read this Instruction Manual carefully before

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MODEL MR-720

SELF-POWERED AM/FM WEATHER BAND CLOCK RADIO

using the unit and retain it for future reference

FUNCTIONS AND CONTROLS

1. BAND SELECT SWITCH

2. LIGHT SWITCH

3. CHARGING INDICATOR

4. LCD DISPLAY with BACK LIGHT

5. RADIO POWER INDICATOR

6. SIREN ON-OFF SWITCH

7. POWER SOURCE SWITCH

8. DYNAMO CRANK HANDLE

9. TUNING KNOB

10. VOLUME KNOB

11. LAMP HEAD

12. SPEAKER

13. 360° TELESCOPIC ANTENNA

14. BACK LIGHT BUTTON

15. MINIUTE SET BUTTON

16. HOUR SET BUTTON

17. ALARM ON-OFF BUTTON

18. TIME SET BUTTON

19. ALARM SET BUTTON

20. SWAP RADIO/ C LO CK DISPL AY
BUTTON

21. PRESET WHEATHER CHANNEL
SWITCH

22. HANDLE

23. AUX-IN JACK

24. DC 6V IN JACK

25. BATTERY COMPARTMENT

To prevent any scratching or damage to your furniture, we strongly recommend

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SPECIAL NOTE

that you purchase small self-adhesive felt pads, available at hardware stores
and home improvement centers everywhere, and apply these pads to the
bottom of the unit before you place the product on any fine wooden furniture.

POWER SOURCE

This unit operates using DYNAMO power (manual charge by cranking), on
optional battery power (3 x “AA” (UM-3) batteries–not included) or with an AC
adapt or (not i nclu ded). The specifi cati on of the AC adapt or is: 6 V DC 200mA with
center positive “+” plug.

A. “DYNAMO” POWER OPERATION

1. A DC 3.6V rechargeable battery is included with MR-720. When first time
using the unit, open the battery compartment and plug the rechargeable
battery into the socket as shown.

2. Replace the Battery Door.

3. Set the POWER SOURCE Switch to the “PWR OFF” position.

4. Lift the Crank Handle (#8) outward until it is fully extended. Rotate the Crank as
shown below. The CHARGING Indicator (#3) will light.

5. Continue tu rni ng the Cra nk for 3 minut es, about 2 turns per seco nd, to achi eve
approximately 10 minutes of power (Radio reception only).

Note: The frequ ency re ading will di sappear f rom the LC D in 2 to 3 minutes after
radi o r ece pti on m ode. This p he nome no n i s n orm al. The c lo ck w i ll r e sume onc e t h e
POWER SOURCE SWITCH has returned to “POWER OFF”.

B. BATTERY OPERATION (Optional)

1. Remove the Battery Door on the back of the radio.

2. Following the polarity diagram shown in the battery compartment, insert 3 ‘AA'
(UM-3) batteries (Not included) and replace the battery door.

3. When batte ries were i nstalled, the power of th e buil d-in recharge able batter y
pack w ill be cut off a f te r setting th e PO W E R S OUR C E Switch (#7) to

(DRY CELL Battery) position.

IMPORTANT

: Be sure that the b at te ri es a re i n stall ed c or r ectl y. Wrong pol arit y ma y

damage the unit.

BATTERY PRECAUTIONS
i. Use only the size and type of battery specifi ed.
ii. Do not mix old and new batteries.
iii. Do not mix alkaline, standard (carbon-zinc) or rechargeable (nickel-cadmium)

batteries.

iv. If the unit is not used for an extended period of time, remove the batteries. Old

or leaking batteries can cause damage to the unit.

v. Do not dispose of batteries to fire, batteries may explode or leak.

C. AC ADAPTOR OPERATION (Optional)

This unit may also be used with an AC adapter (not included). When the AC
adapter is connected to the DC JACK (#24), the batteries are automatically
disconnected. Please make sure to use an AC adapter with a rating of 6V DC, 200
mA with the following center positive (+) polarity.

If you are using a universal adapter wit h an output polari ty switch or pola rized
plugs, be sure to set the center plug polarity to “+”.

Note: T he CHARGE Indicator will light once the AC Adaptor is plugged into the AC
outlet regardless of the setting of the POWER SOURCE SWITCH (#7).

CHARGING THE INTERNAL BATTERIES

This Self-Powered Crank Radio contains a rechargeable Lithium Ion (Li-ion)
battery pack that can be fully charged in approximately 12 hours with an
external adaptor. After fully charged the unit will hold approximately 1 hour or
more of power (Radio reception only).

Note: Rechargeable batteries should be recharged:

i. When they are used for the first time,
ii. They are low in power.
iii. They have not been used for a long period of time (over 60 days).

IMPORTANT: ONLY USE THE OPTIONAL AC ADAPTOR FOR CHARGING.