Jwin Intercom System jk 3030 User Manual

5.5" B/W Television with 7 Channel  
Weather Band and AM/FM Stereo Radio  
Instruction Manual  
JK-3030  
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT  
REMOVE COVER (OR BACK). NO USER SERVICEABLE  
PARTS INSIDE. REFER SERVICING TO QUALIFIED  
SERVICE PERSONNEL.  
The lighting flash with arrowhead symbol within an equilateral triangle  
is intended to alert the user to the presence of uninsulated  
“dangerous voltage” within the products's enclosure that may be of  
sufficient magnitude to constitute a risk of electric shock to persons.  
 
6A. An appliance and cart combination should be moved with care. Quick stops,  
excessive force, and uneven surfaces may cause the appliance and cart com-  
bination to overturn.  
7. Wall or Ceiling Mounting – The appliance should be mounted to a wall or  
ceiling only as recommended by the manufacturer.  
8. Ventilation – The appliance should be situated so that its location or position  
does not interfere with its proper ventilation. For example, the appliance should  
not be situated on a bed, sofa, rug, or similar surface that may block the  
ventilation openings or placed in a built-in installation, such as a bookcase or  
cabinet that may impede the flow of air through the ventilation openings.  
9. Heat – The appliance should be situated away from heat sources such as  
radiators, heat registers, stoves, or other appliances (including amplifiers) that  
produce heat.  
10. Power Sources – The appliance should be connected to a power supply of the  
type described in the operating instructions or as marked on the appliance.  
11. Grounding or Polarization – Observe the precautions that should be taken so  
that the grounding or polarization protective features of an appliance are not  
defeated.  
12. Power – Cord Protection – Power supply cords should be routed so that they  
are not likely to be walked on or pinched by items placed upon or against  
them, paying particular attention to cords at plugs, convenience receptacles,  
and the point where they exit from the appliance.  
13A. Cleaning – The appliance should be cleaned only as recommended by the  
manufacturer.  
13B. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.  
14. Power Lines – An outdoor antenna should be located away from power lines.  
15. Outdoor Antenna Grounding – If an outside antenna is connected to the  
receiver, be sure the antenna system is grounded so as to provide some  
protection against voltage surges and built up static charges. Section 801 of  
the National Electrical Code. ANSI/NFPA NO. 70-1984, provides information with  
respect to proper grounding of the mast and supporting structure, grounding of  
the lead-in wire to an antenna discharge unit, size of grounding electrodes, and  
requirements for the grounding electrode. See Figure 73.1.  
16. Nonuse Periods – The power cord of the appliance should be unplugged from  
the outlet when left unused for a long period of time.  
2
 
17. Object and Liquid Entry – Care should be taken so that objects do not fall and  
liquids are not spilled into the unit through openings.  
18. Damage Requiring Service – The appliance should be serviced by qualified  
service personnel when:  
A. The power supply cord or the plug has been damaged; or  
B. Objects have fallen, or liquid has been spilled into the appliance; or  
C. The appliance has been exposed to rain; or  
D. The appliance does not appear to operate normally or exhibits a marked  
change in performance; or  
E. The appliance has been dropped, or damaged.  
19. Servicing – The user should not attempt to service the appliance beyond  
instructions given in the operating instructions. All other servicing should be  
referred to qualified service personnel.  
POWER LINES  
GROUND CLAMPS  
SERVICE ENTRANCE  
STANDOFF  
INSULATORS  
CONDUCTORS  
b
MAST  
ANTENNA  
LEAD IN WIRE  
SERVICE  
ENTRANCE  
EQUIPMENT  
GROUND WIRE  
GROUND CLAMPS  
ANTENNA  
DISCHARGE  
UNIT  
a.  
a
c
TO EXTERNAL ANTENNA  
TERMINALS OF PRODUCT  
a.  
a
GROUND WIRE  
POWER SERVICE GROUNDING  
ELECTRODE SYSTEM  
GROUND CLAMPS  
(e.g. ntenor water pipe)  
c
OPTIONAL ANTENNA GROUNDING ELECTRODE  
DRI/ENG FEET (2.44 m) INTO THE EARTH  
IF REQUIRED BY LOCAL CODES SEE NEC  
SECTION 810-21 (1)  
BONDING JUMPER  
FIGURE 73.1  
EXAMPLE OF ANTENNA GROUNDING AS PER NATIONAL ELECTRICAL CODE  
INSTRUCTIONS CONTAINED IN ARTICLE 810-  
“RADIO AND TELEVISION EQUIPMENT”  
a. Use No. 10 AWG (5.3 mm2) copper, No. 8 AWG (8.4 mm2) aluminium, No.  
17 AWG (1.0 mm2) copper-clad steel or bronze wire, or larger, as a ground  
wire.  
b. Secure antenna lead-in and ground wire to house with stand-off insulators  
spaced from 4 - 6 feet (1.22 - 1.83 m) apart.  
c. Mount antenna discharge unit as close as possible to where lead-in enters  
house.  
d. Use jumper wire not smaller than No. 6 AWG (13.3 m 2) copper, or the  
equivalent when a separate antenna-grounding electrode is used. See NEC  
Section 810 - 21 (i).  
3
 
3
4
5
2
13  
11  
12 14  
16 17 18  
1
6
7
8
9
10  
19  
15  
1. HEADPHONE JACK  
2. POWER INDICATOR  
3. TV MONITOR  
11. SPEAKER GRILL  
12. DC 12V JACK  
13. TELESCOPIC ANTENNA  
4. FUNCTION SELECTOR  
5. DIAL SCALE  
6. VOLUME CONTROL  
7. BAND SELECTOR  
14. EXTERNAL TV ANTENNA JACK  
15. BATTERY DOOR  
16. VERTICAL V-HOLD  
17. BRIGHTNESS  
8. FM STEREO INDICATOR  
9. TUNING KNOB  
10. POWER KNOB BUTTON  
18. CONTRAST  
19. WEATHER CHANNEL BAND  
SELECTOR  
POWER SUPPLY AND CONNECTION  
Battery Operation  
– Remove Battery Compartment Cover.  
– Put in 10 batteries (UM-2 or equivalent) in correct polarity as indicated inside the  
compartment.  
– Replace the cover.  
Note: Check your batteries regularly, old or discharged batteries should be replaced.  
If the unit is not going to be used for some time or is being run exclusively  
on alternative power, remove the batteries to avoid leakage and damage.  
“High power batteries only should be used to operate this unit”  
AC Mains Power Operation  
Take the supplied AC adaptor cord and connect the corresponding end to the DC  
Socket and household mains power outlet. Make sure the voltage is compatible.  
Note: If you plug the AC adaptor cord off from the AC Socket and from the unit,  
the unit will operate with battery power.  
4
 
RADIO OPERATION  
– Press the Power Switch down to turn on the unit and the Power indicator light up.  
– Set Function Selector to “RADIO” position.  
– Select the desired radio frequency band with Band Selector. For FM Stereo, FM  
Stereo LED light on.  
– Rotate Tuning Control to set the Dial Pointer against the station frequency as  
marked on the dial scale.  
– Adjust Volume Control to the desired volume level.  
ANTENNA  
For FM stations, extend the Telescopic Antenna to full length, adjust the angle and  
direction for the best reception. However, medium wave signals are picked up  
through the built-in ferrite antenna. You may have to orient the set to obtain the  
clearest reception.  
TV OPERATION  
– Press the Power Switch down to turn on the unit.  
– Set Function Selector to “TV” position.  
– Select the desired TV frequency band with Band Selector.  
– Rotate Tuning Control to set the Dial Pointer against the station frequency as  
marked on the dial scale.  
– Adjust Volume Control to the desired level.  
– Adjust V-HOLD, BRIGHTNESS and CONTRAST on back to the desired level.  
EXTERNAL ANTENNA  
If desired you may hook up an outdoor antenna to your portable TV set, which will  
give you greater range and clearer reception for the channels which are difficult to  
receive with the built-in antenna.  
To hook up the outdoor antenna, just connect the VHF or UHF antenna to the  
Antenna Adaptor (included in your set), and then connect the Antenna Adaptor to the  
External Antenna Jack.  
Note: When the antenna adapter is plugged into the external antenna jack, the  
telescopic antenna is automatically disconnected.  
WEATHER BAND AND ALERT OPERATION  
– Set Function Selector to “WB” position.  
– Select the appropriate Weather Band frequency with Weather Channel Band  
Selector for the best reception.  
– Adjust Volume Control to the desired level.  
– Set Function Selector to “ALERT” position in standby stage for ALERT operation.  
– Pre-set WB channel will switch on to alert emergency weather with “Beep” sound.  
PRIVATE LISTENING (EARPHONE)  
An earphone jack is provided for your private listening enjoyment when the earphone  
plug is inserted into the jack. The internal speaker is automatically disconnected.  
Note: The jack is designed to permit the use of 3.5mm plug earphone only.  
5
 
SPECIFICATION  
Power Supply:  
DC  
12V  
Radio Frequency Coverage:  
AM  
FM  
530 - 1710 KHz  
88 - 108 MHz  
Weather Band Frequency Coverage:  
CH 1  
CH 2  
CH 3  
CH 4  
CH 5  
CH 6  
CH 7  
162.550 MHz  
162.400 MHz  
162.475 MHz  
162.425 MHz  
162.450 MHz  
162.500 MHz  
162.525 MHz  
TV Band Frequency Coverage:  
VLF  
VHF  
UHF  
2-6 CH  
7-13 CH  
14-69 CH  
General:  
Speaker  
8 Ohm  
6
 

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