Panasonic Full Hd Lcd Display Th 42lf20 Operating Instructions

							
HDMI connection
DVI-D IN connection
[Pin assignments and signal names]
1931
4218
Note: 
Additional equipment and HDMI cable shown are not supplied with this set\
.
Pin No.Signal NamePin No.Signal Name
1T.M.D.S Data2+11T.M.D.S Clock 
Shield
2T.M.D.S Data2 
Shield12T.M.D.S Clock-
3T.M.D.S Data2-13CEC
4T.M.D.S Data1+14Reserved 
(N.C. on device)
5T.M.D.S Data1 
Shield
6T.M.D.S Data1-15SCL
7T.M.D.S Data0+16SDA
8T.M.D.S Data0 
Shield17DDC/CEC 
Ground
9T.M.D.S Data0-18+5V Power
10T.M.D.S Clock+19Hot Plug Detect
HDMI 
AV OUTHDMI 
AV OUT
DVD player
DVD player HDMI cables
Stereo mini plug (M3)Shared with PC IN.
DVI-video cable with Ferrite core (Within 5 m)
PC with DVI-D 
video out
Pin No. 
   Signal Name  Pin No.    Signal Name 
1T.M.D.S. data 2-13
2T.M.D.S. data 2+14+5 V DC
3T.M.D.S. data 2 shield15Ground 
416Hot plug detect 
517T.M.D.S. data 0-
6DDC clock18T.M.D.S. data 0+ 
7DDC data19T.M.D.S. data 0 shield
820
9T.M.D.S. data 1-21
10T.M.D.S. data 1+22T.M.D.S. clock shield
11T.M.D.S. data 1 shield23T.M.D.S. clock+
1224T.M.D.S. clock-
Notes:
•  Additional equipment and cables shown are not supplied with this set.
•  Use the DVI-D cable with Ferrite core complying with the DVI standard. I\
mage deterioration may occur depending 
on the length or the quality of the cable. DVI-D Input Connector
Pin Layouts
Connection port view
Connections
9 
8 1 
17 24 
16 
11 
						

							
12
PC Input Terminals connection
Notes:
•  Computer signals which can be input are those with a horizontal scanning\
 frequency of 30 to 110 kHz and vertical scanning frequency of 48 to 120 Hz. (However, the image will not be displayed properly if the signals exceed 1,200 l\
ines.)
•  The display resolution is a maximum of 1,440 × 1,080 dots when the as\
pect mode is set to “4:3”, and 1,920 × 1,080 dots   when the aspect mode is set to “FULL”. If the display resolution e\
xceeds these maximums, it may not be possible to show 
fi ne detail with suf fi cient clarity.
•  The PC input terminals are DDC2B-compatible. If the computer being conne\
cted is not DDC2B-compatible, you will need  to make setting changes to the computer at the time of connection.
•  Some PC models cannot be connected to the set.
•  There is no need to use an adapter for computers with DOS/V compatible M\
ini D-sub 15P terminal.
•  The computer shown in the illustration is for example purposes only.
•  Additional equipment and cables shown are not supplied with this set.
•  Panasonic recommends using a PC cable that includes a Ferrite core.
• Do not set the horizontal and vertical scanning frequencies for PC signa\
ls which are above or below the speci fi ed 
frequency range.
Signal Names for Mini D-sub 15P Connector
Pin Layout for PC Input 
Terminal
Pin No.Signal NamePin No.Signal NamePin No.Signal Name
1R6GND (Ground)11NC (not connected)
2G7GND (Ground)12SDA
3B8GND (Ground)13HD/SYNC
4NC (not connected)9+5 V DC14VD
5GND (Ground)10GND (Ground)15SCL
Connections
Conversion adapter 
(if necessary) Mini D-sub 15p
RGB
PC cable with 
Ferrite core Stereo mini plug (M3)
Audio
Connect a cable which matches
the audio output terminal on the computer.
(Male)(Female)
COMPUTER
1  6 
7 
8 
3 
9 
4 
5 
10 
15 14 13 12 11 
2 
Shared with DVI-D IN. 
						

							
6 7 8 9 
1 3 4 5 2 
13
Connections
SERIAL Terminals connection
Notes:
•  Use the RS-232C straight cable to connect the computer 
to the Display.
•  The computer shown is for example purposes only.
•  Additional equipment and cables shown are not supplied  with this set.
The SERIAL terminal conforms to the RS-232C interface 
speci fi cation, so that the Display can be controlled by a 
computer which is connected to this terminal.
The computer will require software which allows the 
sending and receiving of control data which satis fi es  the 
conditions given below. Use a computer application such as 
programming language software. Refer to the documentation 
for the computer application for details. The SERIAL terminal is used when the Display is controlled by a computer.
Basic format for control data
The transmission of control data from the computer starts with 
a STX signal, followed by the command, the parameters, and 
lastly an ETX signal in that order. If there are no parameters, 
then the parameter signal does not need to be sent.
Start
(02h) 3-character
command (3 bytes)Colon Parameter(s)
(1 - 5 bytes) End
(03h)
STX C1 C2 C3 P1 P2 P3 P4
: P5 ETX
Notes:
•  If multiple commands are transmitted, be sure to wait for 
the response for the  fi rst command to come from this unit 
before sending the next command.
•  If an incorrect command is sent by mistake, this unit will  send an “ER401” command back to the computer.
Pin layout for SERIAL Terminal
 
Command Parameter Control details
PON None Power ON
POF None Power OFF
AVL ** Volume 000 - 100
AMT 0 Audio MUTE OFF 1 Audio MUTE ON
IMS None AV 1
AV 2
HM1
HM2
DV1
PC1
Input select (toggle)
VIDEO input (VIDEO)
COMPONENT/RGB IN input 
(Component)
HDMI1 input (HDMI1)
HDMI2 input (HDMI2)
DVI-D IN input (DVI)
PC IN input (PC)
DAM NoneZOOM
FULL
NORM
ZOM2Screen mode select (toggle)
ZOOM1 
FULL
4:3
ZOOM2
With the power off, this display responds to PON command 
only.
Command
Signal level RS-232C compliant
Synchronization method Asynchronous Baud rate 9600 bpsParity None
Character length 8 bits Stop bit 1 bit
Flow control -
Signal names for D-sub 9P connector
Pin No.
Details
2R X D
3T X D
5GND
4 • 6Non use
7
8(Shorted in this set)
1 • 9NC
These signal names are those of computer speci fi cations.
Communication parameters
COMPUTER
RS-232C Straight cable
D-sub 9p(Male)
(Female) 
						

							
POWER
Power switch
14
Power Indicator
Remote Control Sensor
Power ON / OFF
Connecting the AC cord plug to the Display.
Connecting the plug to the Wall Outlet.
Note: 
When disconnecting the AC cord, be absolutely sure to 
disconnect the AC cord plug at the socket outlet fi rst.
Press the Power switch on the Display to turn the set on: 
Power-On. Power Indicator: Green
Press the  button on the remote control to turn the Display off.
Power Indicator: Red (standby) 
Press the  button on the remote control to turn the Display on.
Power Indicator: Green
Turn the power to the Display off by pressing the POWER switch on the unit, when 
the Display is on or in standby mode.
Note: 
During operation of the power management function, the power indicator t\
urns 
orange in the power off state. 
						

							
PRESENT TIME SETUP
PRESENT TIME OF DAY    MON  99 : 99SET
PRESENT TIME OF DAY99 : 99DAY MON
PRESENT TIME SETUP
PRESENT TIME OF DAY    MON  99 : 99
SET
PRESENT TIME OF DAY10 : 00DAY TUE
English (UK) 
Deutsch 
Français   
Italiano 
 
Español 
 
ENGLISH (US) 
Русский  
OSD LANGUAGE
PC
FULL
15
From the second time on, the below screen is displayed for a while (set\
ting condition is an example). When fi rst switching on the unit
Following screen will be displayed when the unit is turned on for the  fi rst time.
Select the items with the remote control. Unit buttons are invalid.
OSD LANGUAGE
PRESENT TIME SETUP
1 Select the language.
2 Set.
1 Select “DAY” or “PRESENT TIME OF DAY”.
2 Setup “DAY” or “PRESENT TIME OF DAY”.
Notes:
•  Once the items are set, the screens wont be displayed when switching on\
 the unit next time.
•  After the setting, the items can be changed in the following menus.
  OSD LANGUAGE (see page 34)
  PRESENT TIME SETUP (see page 28)
1 Select  “SET”.
2 Set.
Power ON / OFF 
						

							
16
Selecting the input signal
Press to select the input signal to be played back from the equipment wh\
ich 
has been connected to the Display.
Input signals will change as follows:PC HDMI1 HDMI2 Component*
VIDEODVI
PC: PC input terminal in PC IN.
DVI: DVI input terminal in DVI-D IN.
HDMI1: HDMI input terminal in AV IN (HDMI1).
HDMI2: HDMI input terminal in AV IN (HDMI2).
VIDEO: Video input terminal in AV IN (VIDEO/S-VIDEO).
Component*: Component or RGB input terminal in COMPONENT/RGB IN.
*  “Component” may be displayed as “RGB” depending on the setti\
ng of 
“COMPONENT/RGB-IN SELECT”. (see page 37)
Notes:
•  Selecting is also possible by pressing the INPUT button on the  unit.
• Select to match the signals from the source connected to the  component/RGB input terminals. (see page 37) 
						

							
POWER
17
Basic Controls
MENU Screen ON / OFF
Each time the MENU button is pressed, the menu screen 
will switch. (see page 21)Normal Viewing PICTURE SET UP SOUND POS. /SIZE
Volume Adjustment
Volume Up “+” Down “–” 
When the menu screen is displayed:
“+” : press to move the cursor up 
“–” : press to move the cursor down
(see page 21)
Remote control 
sensor
Main Power On / Off Switch
Speakers
Brightness Sensor
Detects the brightness in the viewing 
environment.
Main Unit
Power Indicator
The Power Indicator will light.
• Power-OFF .... Indicator not illu minated (The unit will 
still consume some power as long as the 
power cord is still inserted into the wall 
outlet.)
• Standby ......... Red
• Power-ON ...... Green
• POWER MANAGEMENT (DPMS)
   .......................   Orange (With PC input signal. 
See page 32)
Enter / Aspect button 
(see page 19, 21)
INPUT button (Input signal selection)
(see page 16) 
						

							
18
Basic Controls
Standby (ON / OFF) button
The Display must fi rst be plugged into 
the wall outlet and turned on at the power 
switch (see page 14).
Press this button to turn the Display On, 
from Standby mode. Press it again to turn 
the Display Off to Standby mode.
ACTION button
Press to make selections.
ASPECT button
Press to adjust the aspect. 
(see page 19)
POS. /SIZE button 
(see page 23)
PICTURE button  
(see page 25)
Sound mute On / Off  
Press this button to mute the sound.
Press again to reactivate sound.
Sound is also reactivated when power is 
turned off or volume level is changed.
N button  
(see page 24, 25, 26, 27)
POSITION buttons
INPUT button 
Press to select input signal sequentially. 
(see page 16)
Digital Zoom (see page 20)
Remote Control Transmitter
AUTO SETUP button
Automatically adjusts the position/
size of the screen. (see page 23)
SET UP button  (see page 21)
SOUND button  (see page 27)
Volume Adjustment
Press the Volume Up “+” or Down “–” 
button to increase or decrease the 
sound volume level.
R button  (see page 21) 
Press the R button to return to 
previous menu screen.
OFF TIMER button
The Display can be preset to switch to stand-by after 
a  fi xed period. The setting changes to 30 minutes, 
60 minutes, 90 minutes and 0 minutes (off timer 
cancelled) each time the button is pressed.
30 60
090
When three minutes remain, “OFF TIMER 3” will 
fl ash.
The off timer is cancelled if a power interruption 
occurs.
RECALL button
Press the “RECALL” button to display 
the current system status.
1 Input label
2 Aspect mode (see page 19)
3 Off timer
 
The off timer indicator is displayed only 
when the off timer has been set.
4 Clock display (see page 43)
OFF  TIMER  90 
1
2
3
410:00
PC4:3 
						

							
19
ASPECT Controls
The Display will allow you to enjoy viewing the picture at its maximum s\
ize, including wide screen cinema format 
picture.Press repeatedly to move through the aspect options:The aspect mode changes each time the ENTER button is pressed.
[from the unit]
Note:
The aspect mode is memorized separately for each input terminal. Note: 
Be aware that if you put the display in a public place for commercial pu\
rposes or a public showing and 
then use the aspect mode select function to shrink or expand the picture\
, you may be violating the 
copyright under copyright law. It is prohibited to show or alter the copyrighted materials of other p\
eople 
for commercial purposes without the prior permission of the copyright ho\
lder.
4:3 ZOOM1FULL
Aspect mode
Picture  Enlarged screen
Description
FULL
The display of the pictures  fi lls the screen.
In the case of SD signals, pictures with a 4:3 aspect ratio are 
enlarged horizontally, and displayed. This mode is suited to 
displaying anamorphic pictures with a 16:9 aspect ratio.
4:3
Pictures with a 4:3 aspect ratio are displayed with their 
original aspect ratio. Side panels are displayed at the left 
and right edges of the screen.
Pictures with a 16:9 aspect ratio are displayed with their 
original aspect ratio. The left and right edges of the pictures 
are masked by side panels.
ZOOM1
Letterbox pictures with a 16:9 aspect ratio are enlarged 
vertically and horizontally so that their display  fi lls the screen. 
The top and bottom edges of the pictures are cut off.
ZOOM2
Letterbox pictures with a 16:9 aspect ratio are enlarged 
vertically and horizontally so that their display  fi lls the screen. 
The top and bottom edges as well as the left and right edges 
of the pictures are cut off.
ZOOM2 
						

							
2 
EXIT
2
1
EXIT 
× 1× 2× 3× 4
20
Digital Zoom
This displays an enlargement of the designated part of the displayed ima\
ge.
Select the area of the image to be enlarged. Press on the enlargement location to select.
Return to normal display (quit Digital Zoom). Press to exit from the Digital Zoom.
Notes:
•  When power goes OFF (including “Off Timer” operation), Digital Zoom terminates.
•  The Digital Zoom function cannot be selected while in the following oper\
ation state:
  When MULTI DISPLAY SETUP is ON (see page 35).
  When SCREENSAVER is running. (see page 30)
•  While Digital Zoom is in operation, “Adjusting POS. /SIZE” cannot \
be used. Select the magni
fi cation required for the enlarged display.
Each time this is pressed, the magni fi cation factor changes.
This is shown in the image being displayed.
3 2
4
The cursor will move.
1Display the operation guide.
Press to access Digital Zoom.
The operation guide will be displayed.
During Digital Zoom, only the following buttons can be operated.
[Remote control]
POSITION / 
ACTION button