Jensen JE2707 User Manual

JE2707

LCD Color TV

with ATSC Tuner

Operating Manual

Before connecting, operating or adjusting this product, please read the manual completely. Please keep this manual for future reference.

The illustrations and on-screen displays in this operation manual are for explanation purposes and may vary slightly from the actual operations.

Menu items that are not selectable are grayed out.

FOR ASSISTANCE, VISIT US AT WWW.ASAELECTRONICS.COM.

Important Information

WARNING

To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

CAUTION

RISK OF ELECTRIC SHOCK DO NOT OPEN

CAUTION-To reduce the risk of electric shock, do not

perform any servicing other than that contained in the operating instructions unless you are qualified to do so.

This symbol is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

This product utilizes tin-lead solder, and fluorescent lamp containing a small amount of mercury. Disposal of these materials may be regulated due to environmental considerations. For disposal or recycling information, please contact your local authorities or the Electronic Industries Alliance: www.eia.org

FCC STATEMENT

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

FCC CAUTION:

Pursuant to 47CFR, Part 15.21 of the FCC rules, any changes or modifications to this monitor not expressly approved by the manufacturer could cause harmful interference and would void the user's authority to operate this device.

WARNING:

IMPORTANT SAFETY INSTRUCTIONS

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water. Apparatus should not be exposed to dripping or splashing and no objects filled with liquids, such as vases, should be placed on the apparatus.

6) Clean only with a dry cloth.

7) Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.

8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10) Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11) Only use attachments/accessories specified by the manufacturer.

12) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer or sold with the apparatus.

When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13) Unplug this apparatus during lightning storms or when unused for long periods of time.

14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

This is a CLASS B product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures to counter interference.

Important Safeguards

Before using your TV, please read these instructions completely, and keep this manual for future reference. Carefully observe and comply with all warnings, cautions and instructions placed on the unit or described in the operating instructions or service manual.

WARNING

To guard against injury, the following basic safety precautions should be observed in the installation, use and servicing of the unit.

Power Sources

This unit should be operated only from the type of power source indicated on the information label. If you are not sure of the type of electrical power supplied to your home, consult your dealer or local power company.

Grounding or Polarization

This unit is equipped with a polarized AC power cord plug (a plug having one blade wider than the other), or with a threewire grounding type plug (a plug having a third pin for grounding). Follow the instructions below:

For the unit with a three-wire grounding type AC power cord plug (Class 1 unit)

This unit must be connected to an AC power socket outlet with a protective earthing connection.

For the unit with a polarized AC power cord plug

This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug still fails to fit, contact your electrician to have a suitable outlet installed. Do not defeat the safety purpose of the polarized plug by forcing it in.

Wall outlet

Do not use a poor fitting outlet. Insert the plug fully into the outlet. If it is loose, it may cause arcing and result in fire. Contact your electrician to have the outlet changed.

Wiring

For your safety, unplug the AC power cord when wiring cables.

Electric shock

Do not touch the AC power cord or the unit with a wet hand. If you plug/unplug the AC power cord from the unit with a wet hand, it may cause electric shock. Never attempt to move the unit unless the AC power cord is disconnected.

Cleaning

= Clean the AC power plug regularly. = If the plug is covered with dust and it picks

up moisture, its insulation may deteriorate and result in fire. Unplug the AC power plug and clean it regularly.

= Unplug the AC power cord when cleaning this unit. If not, it

may result in electric shock.

= Clean the cabinet of the TV with a dry soft cloth. To remove

dust from the screen, wipe it gently with a soft cloth.

= Stubborn stains may be removed with a cloth slightly

dampened with a solution of mild soap and warm water. Never use strong solvents such as thinner or benzine for cleaning.

= If using a chemically pre-treated cloth, please follow the

instructions provided on the package.

Overloading

Do not overload wall outlets, extension cords or convenience receptacles beyond their capacity, since this can result in fire or electric shock.

Power

Always turn the unit off when it is not being used. When the unit is left unattended and unused for long periods of time, unplug it from the wall outlet as a precaution against the possibility of an internal malfunction that could create a fire hazard.

Sound

If a snapping or popping sound from the TV is continuous or frequent while the TV is operating, unplug the TV and consult your dealer or service technician. It is normal for TV’s to make occasional snapping or popping sounds, particularly when being turned on or off.

AC Power Cord

If you damage the AC power cord, it may result in fire or electric shock. = Do not pinch, bend, or twist the cord excessively. The core

lines may be bared and cut and cause short-circuit, resulting in fire or electric shock.

= Do not convert or damage the AC power cord. = Do not put anything heavy on the AC power cord. Do not

pull the AC power cord.

= Keep the AC power cord away from heat sources. = Be sure to grasp the plug when disconnecting the AC

power cord. If the AC power cord is damaged, stop using it and replace with a new one.

Ventilation

The slots and openings in the TV are provided for necessary ventilation. To ensure reliable operation of the unit, and to protect it from overheating, these slots and openings must never be blocked or covered. Unless proper ventilation is provided, the unit may gather dust and get dirty. For proper ventilation, observe the following:

= Do not install the unit turned backward or sideways. = Do not install the unit turned over or upside down. = Never cover the slots and openings with a cloth or other

materials.

= Never block the slots and openings by placing the unit on a

bed, sofa, rug or other similar surface.

= Never place the unit in a confined space, such as a

bookcase or built-in cabinet, unless proper ventilation is provided.

= Leave some space around the unit. Otherwise, adequate

air-circulation may be blocked, causing overheating, and may cause fire or damage the unit.

Heat sources

Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

Important Safeguards

Do not use this apparatus near water

Do not use near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, and the like. Do not use immediately after moving from a low temperature to high temperature environment, as this causes condensation, which may result in fire, electric shock, or other hazards. This apparatus should not be exposed to dripping or splashing and no objects filled with liquids, such as vases, should be placed on the apparatus.

Entering of objects and liquids

Never insert an object into the product through vents or openings. High voltage flows in the product, and inserting an object can cause electric shock and/or short internal parts. For the same reason, do not spill water or liquid on the product.

Lightning

Unplug this apparatus during lightning storms or when unused for long periods of time. For added protection during a lightning storm, or when left unattended and unused for long periods of time, unplug the apparatus from the wall outlet and disconnect the antenna. This will prevent damage to the equipment due to lightning and power-line surges.

Servicing

Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

Replacement parts

In case the product needs replacement parts, make sure the service person uses replacement parts specified by the manufacturer, or those with the same characteristics and performance as the original parts. Use of unauthorized parts can result in fire, electric shock and/or other danger.

Attachments

Only use attachments/accessories specified by the manufacturer. Do not use attachments not recommended by the manufacturer. Use of improper attachments can result in accidents.

Damage requiring service

If any of the following conditions occurs, unplug the power cord from the AC outlet and request a qualified service person to perform repairs. a. The power cord or plug is damaged. b. Liquid is spilled on the product or when objects have fallen

into the product. c. The product has been exposed to rain or water. d. The product does not operate properly as described in the

operating instructions.

Do not touch the controls other than those described in the

operating instructions. Improper adjustment of controls not

described in the instructions can cause damage, which

often requires extensive adjustment work by a qualified

technician. e. The product has been dropped or the cabinet has been

damaged in any way. f. The product displays an abnormal condition or exhibits a

distinct change in performance. Any noticeable abnormality

in the product indicates that the product needs servicing.

Safety checks

Upon completion of service or repair work, request the service technician to perform safety checks to ensure that the product is in proper operating condition.

Wall or ceiling mounting

When mounting the product on a wall or ceiling, be sure to install the product according to the method recommended by the manufacturer. This is a safety feature.

Panel protection

The panel used in this product is made of glass. Therefore, it can break when the product is dropped or impacted upon by other objects. Be careful not to be injured by broken glass pieces if the panel breaks.

Pixel defect

The panel is a very high-technology product, giving you finely detailed pictures. Occasionally, a few non-active pixels may appear on the screen as a fixed point of blue, green or red. Please note that this does not affect the performance of your product.

Antennas Outdoor Antenna Grounding

If an outdoor antenna is installed, follow the precautions below. An outdoor antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits, or where it can come in contact with such power lines or circuits.

WHEN INSTALLING AN OUTDOOR ANTENNA SYSTEM, EXTREME CARE SHOULD BE TAKEN TO KEEP FROM CONTACTING POWER LINES OR CIRCUITS AS CONTACT WITH THEM IS ALMOST INVARIABLY FATAL.

Be sure the antenna system is grounded to provide some protection against voltage surges and built-up static charges. Section 810 of the National Electrical Code (NEC) in USA and Section 54 of the Canadian Electrical Code in Canada 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 conductors, location of antenna discharge unit, connection to grounding electrodes, and requirements for the grounding electrode.

Antenna Grounding According to the National Electrical Code, ANSI/NFPA 70

Antenna lead-in wire

Ground clamps

Antenna discharge unit

Electric service equipment

NEC: National Electrical Code

(NEC Section 810-20)

Grounding conductors (NEC Section 810-21)

Ground clamps

Power service grounding electrode system (NEC Art 250 Part H)

Table of Contents

Important Information ..............................................................................................................................1

Important Safeguards...............................................................................................................................2

Table of Contents......................................................................................................................................4

Introducing the TV ...................................................................................................................................6

Remove the TV from the Box............................................................................................................6

Installing the TV ................................................................................................................................6

Carrying or Moving the TV................................................................................................................6

TV Controls and Connectors .........................................................................................................7

Control Panel ....................................................................................................................................7

TV Connectors ................................................................................................................................8

Connecting the TV....................................................................................................................................9

Basic Connections..........................................................................................................................9

Overview...........................................................................................................................................9

Connecting Antenna System.............................................................................................................9

Connecting Cable System ................................................................................................................9

Connecting Cable Box ......................................................................................................................10

Connecting Digital Cable Box ...........................................................................................................10

Connecting Satellite Receiver...........................................................................................................11

Connecting Digital Satellite Receiver................................................................................................11

Using External Equipment .............................................................................................................12

Introduction .......................................................................................................................................12

Equipment with HDMI Connection....................................................................................................12

Equipment with DVI Connection .......................................................................................................13

Connecting a VCR for Playing Back .................................................................................................14

Connecting a VCR for Recording......................................................................................................14

Connecting a DVD Player with Component Video Connectors ........................................................15

Connecting a DVD Player with S-Video and Audio Connectors .......................................................15

Connecting a PC...............................................................................................................................16

Connecting a Camcorder or “PlayStation” ........................................................................................16

Connecting a Second TV or Monitor.................................................................................................17

Introducing the Remote Control..............................................................................................................18

Insert Batteries into the Remote Control...........................................................................................18

Using the Remote Control.................................................................................................................18

Button Descriptions...........................................................................................................................20

Getting Started 21

Running Initial Setup.........................................................................................................................21

Setting a Secret Number...................................................................................................................22

Menu Navigation...............................................................................................................................22

Watching TV..............................................................................................................................................23

Turning On/Off .................................................................................................................................23

Introducing Channel Number............................................................................................................23

Selecting Channels...........................................................................................................................23

Adjusting Volume..............................................................................................................................24

Using FREEZE button.......................................................................................................................24

Using ZOOM button..........................................................................................................................24

..........................................................................................................................................

Table of Contents

Adjusting MENU Options.........................................................................................................................26

Picture Control................................................................................................................................26

Accessing Picture Menu ...................................................................................................................26

Selecting Picture Options..................................................................................................................26

Adjusting Picture Settings.................................................................................................................27

Adjusting Screen Settings.................................................................................................................27

Audio Control..................................................................................................................................28

Accessing Audio Menu......................................................................................................................28

Selecting Audio Options....................................................................................................................28

Setting Channels.............................................................................................................................29

Accessing Channels Menu ...............................................................................................................29

Selecting Channel Options ...............................................................................................................29

Setting Channel List..........................................................................................................................29

Setting Favorite Channels.................................................................................................................30

Using the FAVORITE button .............................................................................................................30

Editing Channel Name......................................................................................................................30

Using the Program Guide...............................................................................................................31

Accessing Program Guide ................................................................................................................31

Setting System ...............................................................................................................................32

Accessing Settings Menu..................................................................................................................32

Setting Date & Time..........................................................................................................................32

Setting Timer.....................................................................................................................................32

Input Select.......................................................................................................................................33

Setting Caption Vision.......................................................................................................................33

Using the CCD button.......................................................................................................................33

Setting Menu & Display.....................................................................................................................33

Editing Input Labels ..........................................................................................................................34

Setting Screen Saver........................................................................................................................34

Running Reset System .....................................................................................................................34

Parental Lock Control.....................................................................................................................35

Accessing Locks Menu .....................................................................................................................35

Selecting Locks Options ...................................................................................................................35

Viewing Locked or Blocked Programs ..............................................................................................36

Other Information .....................................................................................................................................37

Troubleshooting ................................................................................................................................37

Care and Maintenance......................................................................................................................39

Specifications....................................................................................................................................40

Introducing the TV

Installing the TV

Select a steady platform with good ventilation to place the TV.

= Keep enough space above and behind the Display. =

The TV should be installed near an easily accessible power outlet.

To prevent internal heat buildup, do not block the ventilation openings.

Do not install the TV in a hot or humid place, or in a place subject to excessive dust or mechanical vibration.

Be sure to take measures to prevent the TV from toppling over and causing

injury.

= To obtain the best picture, do not expose the screen to direct illumination or

direct sunlight. It is recommended to use spot lighting directed down from the ceiling or to cover the windows that face the screen with opaque drapery. It is desirable to install the TV in a room where the floor and walls are not of a reflective material.

Cautions:

Do not install the TV in protruding locations.

Do not install this unit in restaurants where oily vapors occur. Dust absorbing

oil may enter into the unit and damage the unit. Do not install this unit outdoors. If the unit is exposed to rain, it may result in fire

or electric shock. If the unit is exposed to direct sunlight, the unit may heat up and cause damage to the unit. Do not install this unit in a vehicle or hang from the ceiling. Bumping of the

vehicle may cause the unit to fall down and cause injury. Do not install this unit in a ship or vessel. If the unit is exposed to seawater, it

may cause fire or damage the unit. If you install the unit on a non-level surface, the unit may fall or drop and cause

injury or damage. If you place the unit on an unstable surface, the unit may fall and cause injury or

damage. Do not hang anything on the unit. If you do so, the unit may fall from the stand or

wall-mount bracket, causing damage or serious injury.

Carrying or Moving the TV

When you move the TV, carry it by two or more people.

When you move the TV, hold the upper and bottom frames of the TV, not the speaker.

As the glass surface of the TV has a special coating, be careful to avoid touching the glass surface as much as possible.

When transporting, do not subject the unit to shocks or vibration, or excessive force.

TV Controls and Connectors

Control Panel

CH+

Introducing the TV

POWER

MODE

CH+

CH-

VOL+

VOL-

CH-

VOL+

VOL-

Item Description

Power Indicator

Remote Sensor

CH-/CH+

VOL-/VOL+

MENU*

POWER6

INPUT

In normal viewing, press the MENU button to access the Menu main page.

*

Receives IR signals from the remote control.

Press to scan through channels. In menu operations, these buttons serve as down/up buttons.

Press to adjust the volume. In menu operations, these buttons serve as left/right buttons.

To access the Menu main page.

Turn the unit on or off.

To display the input source list or to quickly select input source.

In Menu operations, the MENU button is used to confirm or alter the settings of the selected menu item. It has the same function as the OK button on the remote control unit.

Introducing the TV

TV Connectors

TV Left Side

Item

Composite Audio IN

Composite Video IN

S-VIDEO input

USB Port

Component Audio

Component Video

Audio OUT

Video OUT

RF IN

D-Sub IN

Description

Connect to the composite audio output jacks on your VCR or other video device. Connect to the composite audio output jacks on your VCR or other video device.

Connect to the composite video output jacks on your VCR or other video device.

Connects to the S-VIDEO output jack of your VCR or other video equipment that has S-VIDEO. S-VIDEO provides better picture quality than the composite video connection.

For service only. The user should not use this port.

Connect to your DVD player’s or digital set-top box’s component video (YPbPr) and audio (L/R) jacks. Component video provides better picture quality than the S-VIDEO or the composite video

Connects to your VCR to record programs as desired or connects to hook up a second TV or monitor.

Only analog TV programs, AV1and AV2 input sources can be output through the AV output

RF input that connects to your cable system or outdoor antenna.

Connects to a PC or other Analog RGB devices such as Video Conferencing or Set-top Boxes.

Audio IN for DVI

or D-Sub interface

HDMI IN

Use this audio input when you are using DVI connection or D-Sub connection. A HDMI-to-DVI adapter is necessary when you are connecting a DVI-equipped device to this TV

HDMI (High-Definition Multimedia Interface) provides an uncompressed, all-digital audio/video interface between this TV and any HDMI-equipped audio/video component, such as a set-top box and DVD player. HDMI supports enhanced, or high-definition video, plus two-channel digital audio.

Basic Connections

Connecting the TV

Overview

Connecting Antenna System

To display clear, crisp pictures, you must connect your TV correctly and choose the correct display format. It is strongly recommended to connect the cable and antenna input using a 75-ohm coaxial cable to receive an optimum picture quality signal. A 300-ohm twin lead cable can be easily affected by radio noise and the like, resulting in signal deterioration. If you use a 300-ohm twin lead cable, keep it as far away as possible from the TV. The way in which you connect your TV will vary, depending on how your home receives a signal (antenna and satellite; cable and cable box). Do not use an indoor antenna, which is especially susceptible to radio noise.

Disconnect all power sources before making any connections.

For best results, use this connection if you have an antenna system.

TV Left Side

Antenna cable

PIC

D-SUB IN

AUDIO

HDMI

Connecting Cable System

Be sure to choose "Antenna" before you start Auto Program. See chapter "Getting Started" for details.

For best results, use this connection if you have a cable system.

TV Left Side

CATV cable

PIC

D-SUB IN

AUDIO

HDMI

Be sure to choose "Cable" before you start Auto Program. See chapter "Getting Started" for details.

Connecting the TV

Basic Connections

Connecting Cable Box

Connecting Digital Cable Box

For best results, use this connection if you have a cable system and your cable company scrambles some channels, such as premium channels or all channels (which requires you to use a cable box). Connect the CATV cable to the cable box’s input jack. Then use a coaxial cable to connect the cable box’s output jack to the TV’s RF input jack.

TV Left Side

CATV cable Coaxial Cable

PIC

D-SUB IN

AUDIO

HDMI

OUT

Cable box

Be sure to choose "Cable" before you start Auto Program. See chapter "Getting Started" for details.

Connect the RF coaxial cable from the CATV to the input of the digital cable box. Use a component video cable to connect the YPbPr jacks of your digital cable box to the TV’s component jacks. Component video connection is necessary to view digital broadcastings in 1080i, 720p, 480i and 480p. This TV displays most picture formats. The component Jacks do not provide audio, so audio cables must be connected to provide sound.

TV Left Side

AV 2 IN

VIDEO L - AUDIO - R

S-VIDEO

USB

(UPGRADE PORT)

R - AUDIO - L

COMPONENT IN

b r

AV OUT AV 1 IN

Y P P

VIDEO L - AUDIO - R

PIC

D-SUB IN

AUDIO

HDMI

Digital Cable Box

Audio cable RF coaxial cable

Component video cable

Cables are often color-coded to connectors. Connect red to red, white to white, etc.

Basic Connections

Connecting the TV

Connecting Satellite Receiver

Connect the satellite antenna cable to the satellite receiver’s SATELLITE IN jack. Use AV cables to connect the satellite receiver’s AUDIO and VIDEO OUT jacks to the TV’s AUDIO and VIDEO IN jacks.

Cables are often color-coded to connectors. Connect red to red, white to white, etc.

Satellite Receiver

TV Left Side

AV 1 IN

AV 2 IN

VIDEO L - AUDIO - R

S-VIDEO

If your is not equipped with S-VIDEO, use a VIDEO cable

satellite receiver

AV cable

S-VIDEO cable

Satellite antenna cable

(yellow) instead of the S-VIDEO cable.

Connecting Digital Satellite Receiver

Connect the RF coaxial cable from the satellite dish to the input of the digital satellite receiver. Use a component video cable to connect the YPbPr jacks of your digital satellite receiver to the TV’s component jacks. Component video connection is necessary to view digital broadcastings in 1080i, 720p, 480i and 480p. This TV displays most picture formats. The component Jacks do not provide audio, so audio cables must be connected to provide sound.

TV Left Side

AV 2 IN

VIDEO L - AUDIO - R

S-VIDEO

USB

(UPGRADE PORT)

R - AUDIO - L

COMPONENT IN

b r

AV OUT AV 1 IN

Y P P

VIDEO L - AUDIO - R

Audio cable RF coaxial cable

Digital Satellite Receiver

Component video cable

PIC

D-SUB IN

AUDIO

HDMI

Cables are often color-coded to connectors. Connect red to red, white to white, etc.

Connecting the TV

Using External Equipment

Introduction

Equipment with HDMI Connection

You can connect many types of external equipment to your TV, including a DVD player, VCR, Digital TV tuner, PC, HDMI equipment, game console or camcorder. To view external source images, select the input source from on the

input

remote control unit or on the Display.

Notes and Cautions:

= Disconnect all power sources before making any connections. = Carefully check the terminals for position and type before making any

connections.

= The packing contents of this TV may not include the cables or adaptors

mentioned in this chapter.

= Refer to your external equipment operation manual carefully before making

connections.

= Loose connectors can result in image or color problems. Make sure all

connectors are securely inserted into their terminals.

= Refer to your external equipment operation manual for the signal type. = The illustration of the external equipment may be different depending on your

model.

For best results, use this connection if your equipment has a High-Definition Multimedia Interface (HDMI). Use a HDMI cable, connect the equipment’s HDMI OUT jack to the TV’s HDMI IN jack.

TV Left Side

AV 2 IN

VIDEO L - AUDIO - R

S-VIDEO

USB

(UPGRADE PORT)

R - AUDIO - L

COMPONENT IN

b r

AV OUT AV 1 IN

Y P P

VIDEO L - AUDIO - R

PIC

D-SUB IN

AUDIO

HDMI

Equipment with HDMI output

HDMI cable

The HDMI jack provides both video and audio signals, so it is not necessary to connect the audio cable.

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