JVC Lt 20bw7b Instructions

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ENGLISH
Feature menu
• In the Feature menu, the last setting made 
for each item is memorised.
Language
The Language setting which was performed 
in the “Initial settings (Setup tour)” (page 7) 
Press the 2 and 3 buttons to choose a 
language
Aspect Ratio
You can change the screen size according to 
the picture aspect ratio. For details about the 
Aspect Ratio settings, see “ZOOM function” 
on page 13.
Press the 2 and 3 buttons to choose a 
setting
Sleep Timer
You can set the TV to automatically turn off 
after a set period of time. For details, see 
“Sleep Timer function” on page 14.
Press the 2 and 3 buttons to set the 
period of time
Child Lock
You can use this function to prevent children 
changing programmes or adjustments etc. 
without remote control.
Press the 2 and 3 buttons to turn the 
function on or off
When “Off” is selected, there will be no 
difference in the operation of your TV. 
When “On” is selected, the TV can only 
be controlled by the remote control 
handset. In this case the control panel 
buttons, except   button, on the TV will 
not work.
Blue Back
You can set the TV to automatically change 
to a blue screen and mute the sound if the 
signal is weak or absent, or when there is no 
input from an external device.
Press the 2 and 3 buttons to turn the 
function on or off
FeatureLanguageEnglishAspect RatioFullSleep TimerOff MinutesChild LockOffBlue BackOn
MENU: OK:
 
						

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PC Setting menu
• This menu is only available when the TV 
is displaying a computer screen. For 
details about how to display a computer 
screen, see “Displaying a computer 
screen” on page 29.
• In the PC Setting menu, the last setting 
made for each item is memorised.
Auto
If you shift the picture horizontally or 
vertically to an unwanted position, use this 
function to put the picture into correct place 
automatically.
Press the PICTURE/OK button to 
begin auto adjustment
Dot Clock
This function corrects interference that may 
appear as vertical banding in dot intensive 
presentations like spreadsheets or paragraphs 
or text in smaller fonts.
Press the 2 and 3 buttons to adjust 
the value
Clock Phase
Depending on the resolution and scan 
frequency of the PC input. you may see a 
muddy or noisy picture on the screen. In such 
case you can use this function to get a clear 
picture.
Press the 2 and 3 buttons to adjust 
the value
H. Position
This function shifts the image horizontally to 
right hand side or left hand side of the screen.
Press the 2 and 3 buttons to adjust 
the value
V. Position
This function shifts the image vertically 
towards the top or bottom of the screen.
Press the 2 and 3 buttons to adjust 
the value
PC SettingAutoDot Clock 0Clock Phase -7H. PositionV. Position
MENU: OK:
 
						

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Displaying a computer screen
This TV can be used as a computer screen.
Connecting to the computer
Use a D-SUB cable to connect the TV’s PC 
IN RGB terminal to the computer’s analogue 
RGB output terminal.
If you want to listen to the sound from the 
computer, use an audio cable to connect the 
TV’s PC IN AUDIO terminal to the 
computer’s sound output terminal.
• Refer to the computer manual for a 
detailed explanation of the connections at 
the computer side.
• Ensure that the connectors are facing the 
correct way when connecting.
• After connecting the D-SUB cable, 
tighten the two screws to fix the connector 
in place.
Watching images from a 
computer
After starting the computer, press the 
AV button to choose “PC”
You can listen to the sound when the 
sound from the computer is connected to 
the PC IN AUDIO terminal.
Table of signals for each type 
of computer
* Only the above formats are supported.
* Even with the above formats, some 
problems may be experienced depending 
on the quality of the synchronous signal. 
(Depending on the quality, some pictures 
may not be displayed properly.)
When a picture is not displayed
Check the computer’s refresh rate and set it 
according to the table above. Refer to the 
computer’s instruction manual.
Computers which cannot have compatible 
refresh rates cannot be used with this unit.
Resolution Vertical 
frequency 
(Hz)Horizontal 
frequency 
(kHz)
720 × 400 (VGA70) 70.08 31.47
640 × 480 (VGA) 60 31.5
640 × 480 (VGA) 67 35
640 × 480 (VGA) 75 37.5
640 × 480 (VGA) 72.81 37.86
800 × 600 (SVGA) 56.25 35.16
800 × 600 (SVGA) 60.32 37.9
800 × 600 (SVGA) 75 46.9
800 × 600 (SVGA) 72.19 48.08
1024 × 768 (XGA) 60 48.4
1024 × 768 (XGA) 70 56.5
1024 × 768 (XGA) 75 60
1360 × 768 (WXGA) 60 47.7
 
						

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Additional preparation
Connecting external equipment
Connect the equipment to the TV, making 
the correct connections.
Before connecting anything:
• Read the manuals that came with the 
equipment.
Depending on the equipment, the 
connection method may be different from 
the diagram. Also, the equipment settings 
may need to change depending on the 
connection method.
• Turn off all the equipment including the 
TV.
• The “Specifications” on page 35 give the 
details of the EXT terminals. If you are 
connecting equipment not listed in the 
following connection diagram, see the 
table to choose the best EXT terminal.
• Connecting cables are not supplied.„Connecting the PC
For details, see “Connecting to the 
computer” on page 29.
1VCR (composite signal)
2VCR (composite signal/S-VIDEO signal)
3Decoder
4DVD player (composite signal/S-VIDEO 
signal)
5DVD player (composite signal/RGB 
signal)
6DVD player (digital audio/video signal; 
HDMI)
7TV game (composite signal/RGB signal)
8TV game (composite signal/S-VIDEO 
signal)
9Headphones
0Camcorder (composite signal/S-VIDEO 
signal)
-SCART cable
=Audio cable
~Video cable
!S-VIDEO cable
@HDMI cable
 
						

							Additional preparation
31
ENGLISH
 
						

							32
Additional preparation
„Equipment which can output the 
composite signal such as a VCR
Connect the equipment to the EXT-1, EXT-2 
or EXT-3   terminal.
„Equipment which can output the 
S-VIDEO signal (Y/C signal) such 
as an S-VHS VCR
Connect the equipment to the EXT-2 or 
EXT-3  terminal.
„Equipment which can output the 
digital audio/video signal (HDMI) 
such as a DVD player
Connect the equipment to the HDMI   
terminal.
„Connecting headphones
Connect the headphones with a stereo mini-
jack (3.5 mm diameter) to the headphone 
socket at the TV rear panel.
• No sound comes from the TV speakers 
when the headphones are connected.
„TV output from the EXT-1 terminal
The video/sound signal of a TV channel you 
are viewing is always output from the EXT-1 
terminal.
• Changing over a Programme number (Pr.) 
also changes over the TV output from the 
EXT-1 terminal.
• Teletext programmes cannot be output.
„TV and video output from the EXT-
2 terminal
The video/sound signal of a TV channel is 
output from the EXT-2 terminal when 
viewing the TV and EXT3-S inputs.
When viewing composite video input from 
the EXT-1 or EXT-3   terminal, the 
video/sound signal is also output from the 
EXT-2 terminal.
„Connecting speakers/amplifier
While referring to the audio equipment 
connection diagram, connect the audio 
equipment you want to the TV.
You can use external front speakers to listen 
to the TV sound instead of the TV speakers.
Before connecting anything:
• Read the manuals provided with the 
amplifier and speakers.
• Turn the TV and amplifier off.
• Note that connecting cables are not 
supplied.
• The output from the AUDIO OUT 
terminal is not interrupted by headphone 
connection to the TV. You cannot cut the 
sound from the front speaker even if you 
connect a headphone to the TV.
• Adjust the volume of the external 
speakers with the amplifier.
LR
1Amplifier
2External speakers (Magnetic-shielded type)
 
						

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Troubleshooting
If a problem arises while you are using the TV, please read this troubleshooting guide carefully 
before you ask to have the TV repaired. You may be able to fix it easily by yourself. For example, 
if the mains plug is disconnected from the mains outlet, or the TV aerial has problems, you may 
think there is a problem with the TV itself.
Important:
• This troubleshooting guide only covers problems whose causes are not easy to decide. If you 
have a question when you are operating a function, read the page(s) for that function carefully, 
not this troubleshooting guide.
• If you follow the advice in this troubleshooting guide without any success, unplug the mains 
plug and ask for your TV to be repaired. Do not attempt to repair the TV by yourself or to 
remove the rear cover of the TV.
„If you cannot turn on the TV
• Is the mains plug connected to the mains 
outlet?
• Is the power lamp lit? If not, press the   
button on the TV.
„No picture or no sound
• Have you chosen a TV channel with very 
poor reception? If so, the Blue Back 
function will be activated: the entire 
screen becomes blue, and the sound is 
muted. If you still want to view the TV 
channel, follow the description “Blue 
Back” on page 27 to change the Blue 
Back function setting to Off.
• If the Sound System setting for a TV 
channel is incorrect, it may prevent the 
sound from being issued. Follow the 
description “Manual Program” on page 23 
to use the Manual Program function to try 
to change the Sound System setting.
„Poor picture
• If noise (snow) totally blocks out the 
picture, there may be a problem with the 
aerial or aerial cable. Check the following 
to try to solve the problem:
– Have the TV and aerial been connected 
properly?
– Has the aerial cable been damaged?
– Is the aerial pointing in the right 
direction?
– Is the aerial itself faulty?
• If the TV or aerial suffers interference 
from other equipment, stripes or noise 
may appear in the picture. Move any 
equipment such as an amplifier, personal 
computer, or a hair drier, that can cause 
interference away from your TV. Or try moving the TV. If the aerial suffers 
interference from a radio tower or high-
voltage wire, please contact your local 
dealer.
• If the TV suffers interference from signals 
reflecting from mountains or buildings, 
double-pictures (ghosting) will occur. Try 
to change the aerial’s direction or replace 
it with one with better directionality.
• Are your Colour System settings correct? 
Follow the description “Colour System” 
on page 26 to try to solve the trouble.
• Have the Colour and Bright-1 settings 
been adjusted properly? Follow the 
description “Colour” and “Bright-1” on 
page 20 to try to adjust them properly.
• Videotaping teletext is not recommended 
because it may not record correctly.
• When viewing images from commercially 
available video software products, or 
videos from videotapes which have been 
recorded improperly, the top of the image 
may be distorted. This is due to the 
condition of the video signal. There is 
nothing wrong with the TV.
„Poor sound
• Have you adjusted Bass or Treble 
properly? If not, follow the description 
“Bass” or “Treble” on page 22.
• When TV channel reception is poor, it can 
be hard to hear stereo or bilingual sound. 
In this case, follow the description 
“Sound Mode” on page 22 to hear the 
sound more easily by changing it to a 
mono sound.
 
						

							34
Troubleshooting
„If the TV does not respond to the 
remote control
• Have the batteries of the remote control 
worn out? Follow the description “Putting 
the batteries into the remote control” on 
page 7 and replace them with new batteries.
• Have you attempted to use the remote 
control from the sides or rear of the TV or 
from more than seven metres away from the 
TV? Use the remote control in front of your 
TV or from less than seven metres away.
• When you are viewing a teletext 
programme, you cannot operate the 
menus. Press the   (Text) button to 
return to the ordinary TV programme, and 
then try operating the menus.
• If the TV suddenly stops responding, 
disconnect the power cord of the TV from 
the AC outlet. Connect them to the AC 
outlet again to turn on the TV. If the TV 
returns to a normal state, it is not a failure.
„Other issues
• When the Sleep Timer function operates, 
the TV is automatically turned off. If the 
TV suddenly turns off, try to press the 
 (standby) button to turn on the TV 
once again. If the TV goes back to 
normal, there is no problem.
• It takes a short period of time from the 
time an operation such as changing 
channels is performed until an image is 
displayed. This is not a fault. This is the 
time needed for the image to stabilize 
before it can be displayed.
• The TV may make a crackling sound due 
to a sudden change in temperature. The 
picture or sound may be normal. If you 
hear crackling sounds frequently while 
you are viewing the TV, there may be 
other causes. As a precaution, ask your 
service technician to inspect it.
• The top of the TV and the screen may 
become hot during use but this has no 
affect on the performance of the TV. 
Make sure that the ventilation holes are 
not blocked.• When the picture is unstable, the screen 
may become white for a moment. This 
happens when the signal which drives the 
liquid crystal is missing. This is not a 
fault.
• When a still image has been displayed for 
a long period, a faint residual image may 
remain on the screen for a short time after 
the power has been turned off or when 
another image is displayed. This is not a 
fault and the image will eventually 
disappear.
 
						

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ENGLISH
Specifications
We may change the design and specifications without notice.
Pictures displayed on the screen using this TV’s ZOOM functions should not be shown for any 
commercial or demonstration purpose in public places (cafes, hotels, etc.) without the consent of 
the owners of copyright of the original picture sources, as this would be an infringement of 
copyright.
Model LT-20BW7BW / LT-20BW7BE / LT-20BW7BN / LT-20BW7BSBroadcasting systems BG, I, DK, L
Colour systems PAL, SECAM
• The EXT terminals also support the NTSC3.58 and NTSC4.43 systems
Channels and frequencies 47-862MHz
Sound-multiplex systems NICAM (BG, I, DK, L) system, A2 (BG, DK) system
Teletext systems TOP/FLOF (Fastext)
Power requirements 220 - 240 V AC, 50/60 Hz
Power consumption 70 W (Standby: < 1 W)
Screen size Viewable area 50.8 cm (measured diagonally)
Audio output Rated Power output: 3 W + 3 W
Speakers 2.5 cm round × 2
EXT-1 terminal Euroconnector (21-pin, SCART)
• Video input, Audio L/R inputs and RGB inputs are available.
• TV broadcast outputs (Video and Audio L/R) are available.
EXT-2 terminal Euroconnector (21-pin, SCART)
• Video input, S-VIDEO (Y/C) input and Audio L/R inputs are available.
• Video and Audio L/R outputs are available.
EXT-3 terminal RCA connectors × 3 (composite input)
S-VIDEO connector × 1
HDMI terminal HDMI connector × 1
• 480p, 576p, 720p and 1080i signals are available.
AUDIO OUT terminal RCA connectors × 2
• Audio L/R outputs are available.
• Output level 500 Vrms.
PC INPUT terminal Analog RGB D-SUB (15 pin) × 1
• PC signal is available. Refer to page 29 for details of the signals which can be 
input.
PC audio stereo mini-jack (3.5 mm in diameter) × 1
Headphone jack Stereo mini-jack (3.5 mm in diameter)
Dimensions (W × H × D) 533 mm × 348 mm × 107 mm (TV only)
533 mm × 386 mm × 236 mm (with stand)
Weight 6.76 kg (TV only)
7.51 kg (with stand)
Accessories Remote control unit × 1 (RM-C1514)
AA/R6 dry cell battery × 2
 
						

							4J.06801.031