LG M237wd Owners Manual

							80
APPENDIX
EXTERNAL CONTROL DEVICE SETUP
RS-232C Setup
Connect the RS-232 C (serial port) input jack to an
external control device (such as a computer or an A/V
control system) to control the product’s functions
externally.
Connect the serial port of the control device to the
RS-232 C jack on the product back panel.
Note: RS-232 C on this unit is intended to be used
with third party RS-232 C control hardware and soft-
ware. The instructions below are provided to help with
programming software or to test functionality using
telenet software. RS-232 C connection cables are not
supplied with the product.
Type of Connector; D-Sub 9-Pin Male
No.  Pin Name
1  No connection
2 RXD (
Receive data)
3 TXD (
Transmit data)
4 DTR (
DTE side ready)
5 GND
6 DSR (
DCE side ready)
7 RTS (
Ready to send)
8 CTS (
Clear to send)
9 No Connection
RS-232C IN
(CONTROL & SERVICE)
15
69
RS-232C Configurations
7-Wire Configuration (Serial female-female NULL modem cable)
PC TV
RXD  2 3 TXD
TXD 3 2 RXD
GND 5 5 GND
DTR 4 6 DSR
DSR 6 4 DTR
RTS 7 8 CTS
CTS 8 7 RTS
D-Sub 9 D-Sub 9
3-Wire Configurations(
Not standard)
PC TV
RXD  2 3 TXD
TXD 3 2 RXD
GND 5 5 GND
DTR 4 6 DTR
DSR 6 4 DSR
RT S 7 7 RT S
CTS 8 8 CTS
D-Sub 9 D-Sub 9
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APPENDIX
Use this function to specify a set ID number. 
Refer to ‘Real Data Mapping’. 
p p.
.8
84
4
Set ID
Select OPTION.
2
Select Set ID.
3adjust S Se
et
t 
 I
ID
D
to choose the desired set ID number.
The adjustment range of SET ID is 1~99.
1
ENTER
ENTER
• Press the MENUbutton to close the menu window.
• Press the RETURN button to move to the previous menu screen.
Language : English
Input Label
Key Lock : Off
Caption : Off
Set ID : 1
Power Indicator : On
DDC-CI : On
Initial Setting : Home
OPTIONMoveEnter
Set ID : 1
Language : English
Input Label
Key Lock : Off
Caption : Off
Set ID : 1
Power Indicator : On
DDC-CI : On
Initial Setting : Home
OPTIONMoveEnter
Set ID : 1F F 
  
  
  
  
  
  
  
  
  
  
  
 1G
G
Close
MENU
 
						

							82
APPENDIX
Command Reference List
C CO
OM
MM
MA
AN
ND
D1
1C
CO
OM
MM
MA
AN
ND
D2
2
19. Channel Tuning
DATA
(Hexadecimal)C CO
OM
MM
MA
AN
ND
D1
1C
CO
OM
MM
MA
AN
ND
D2
2DATA
(Hexadecimal)
C CO
OM
MM
MA
AN
ND
D1
1C
CO
OM
MM
MA
AN
ND
D2
2DATA 0 0(Hexadecimal)DATA 01(Hexadecimal)DATA 02(Hexadecimal)DATA 03(Hexadecimal)DATA 04(Hexadecimal)DATA 05(Hexadecimal)
physical   major major low minor high minor low attribute
program high program low ma
01. Power   k  a 00 ~01
02. Input Select  x  b (
G Gp.83)
03. Aspect Ratio  k  c (
G Gp.83)
04. Screen Mute  k  d 00 ~01
05. Volume Mute  k  e 00 ~01
06. Volume Control  k  f 00 ~64
07. Contrast  k  g 00 ~64
08. Brightness  k  h 00 ~64
09. Color  k  i 00 ~64
10. Tint  k  j 00 ~64
11. Sharpness  k  k 00 ~64
12. OSD Select  k  l 00 ~01
13. Remote Control
Lock Mode
Transmission / Receiving  Protocol
T Tr
ra
an
ns
sm
mi
is
ss
si
io
on
n
[Command 1] : First command to control the set.
(j, k, m or x)
[Command 2] : Second command to control the set.
[Set ID] : You  can  adjust  the  set  ID  to  choose  desired  set  ID
number in Option menu. Adjustment range is 1
~99.
When selecting Set ID ‘0’, every connected the set is
controlled. Set ID is indicated as decimal (
1
~ 99)
on
menu and as Hexa decimal (
0x0~ 0x63)
on transmission
/receiving protocol.
[DATA] : To transmit the command data.
Transmit the ‘FF’ data to read status of command.
[Cr] : Carriage Return
ASCII code ‘0x0D’
[   ] : ASCII code ‘space (0x20)’
* In this model, set will not send the status during the standby mode.
O OK
K 
 A
Ac
ck
kn
no
ow
wl
le
ed
dg
ge
em
me
en
nt
t
The set transmits ACK (acknowledgement) based on this for-
mat  when  receiving  normal  data.  At  this  time,  if  the  data  is
data read mode, it indicates present status data. If the data is
data write mode, it returns the data of the PC computer.* In this model, set will not send the status during the standby mode.
* Data Format
[Command 2] : Use as command.
[Set ID] : Use the small character, if set ID is 10, it will send the ‘0’, ‘a’.
[DATA] : Use the small character, if data is 0 x ab, it will send the ‘a’, ‘b’.
[OK] : Use the large character.
E Er
rr
ro
or
r 
 A
Ac
ck
kn
no
ow
wl
le
ed
dg
ge
em
me
en
nt
t
The set transmits ACK (acknowledgement) based on this for-
mat when receiving abnormal data from non-viable functions
or communication errors.
Data1: Illegal Code
Data2: Not supported function
Data3: Wait more time
* In this model, set will not send the status during the standby mode.
* Data Format
[Command 2] : Use as command.
[Set ID] : Use the small character, if set ID is 10, it will send the ‘0’, ‘a’.
[DATA] : Use the small character, if data is 0 x ab, it will send the ‘a’, ‘b’.
[NG] : Use the large character
[ [C
Co
om
mm
ma
an
nd
d1
1]
][
[C
Co
om
mm
ma
an
nd
d2
2]
][
[ 
  
 ]
][
[S
Se
et
t 
 I
ID
D]
][
[ 
  
 ]
][
[D
Da
at
ta
a]
][
[C
Cr
r]
]
[
[C
Co
om
mm
ma
an
nd
d2
2]
][
[ 
  
 ]
][
[S
Se
et
t 
 I
ID
D]
][
[ 
  
 ]
][
[O
OK
K]
][
[D
Da
at
ta
a]
][
[x
x]
]
[
[C
Co
om
mm
ma
an
nd
d2
2]
][
[ 
  
 ]
][
[S
Se
et
t 
 I
ID
D]
][
[ 
  
 ]
][
[N
NG
G]
][
[D
Da
at
ta
a]
][
[x
x]
]
14. Treble  k  r 00 ~64
15. Bass   k  s 00 ~64
16. Balance   k  t 00 ~64
17.
Color Temperaturek  u 00 ~02
18. Auto Configuration j u (
G Gp.84)
20. Channel Add/Del m b 00 ~01
21 . K e y m c (
G Gp.85)
22. Backlight m g 00 ~64
00 ~01
k  m
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							83
APPENDIX
0 01
1.
.P
Po
ow
we
er
r 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 a
a)
)
To control Power On/Off of the set.
Transmission [k][a][  ][Set ID][  ][Data][Cr]
Data 00: Power Off Data 01: Power On
Acknowledgement [a][  ][Set ID][  ][OK/NG][Data][x]
* In a like manner, if other functions transmit ‘FF’ data
based on this format, Acknowledgement data feedback
presents status about each function.
* Note: In this model, set will send the Acknowledge
after power on processing completion.
There might be a time delay between command and
acknowledge.
0 02
2.
. 
 I
In
np
pu
ut
t 
 S
Se
el
le
ec
ct
t 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 x
x 
 b
b)
)
To select input source for set. 
Transmission[x][b][  ][Set ID][  ][Data][Cr]
Data 00: DTV (Antenna) Data 01: DTV (Cable)
Data 10: Analog (Antenna) Data 11: Analog (Cable)
Data 20: AV Data 40: Component
Data 60: RGB-PC Data 70:DVI
Data 90: HDMI1 Data 91: HDMI2
Acknowledgement[b][  ][Set ID][  ][OK/NG][Data][x]
0
03
3.
. 
 A
As
sp
pe
ec
ct
t 
 R
Ra
at
ti
io
o 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 c
c)
)
To adjust the screen format.
Transmission [k][c][  ][Set ID][  ][Data][Cr]
Data 01: 4:3 06: Set by program
02: 16:9 04: Zoom 1
09: Just scan 05: Zoom 2
Reserved
Acknowledgement[c][  ][Set ID][  ][OK/NG][Data][x]
0
04
4.
.S
Sc
cr
re
ee
en
n 
 M
Mu
ut
te
e 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 d
d)
)
To select screen mute on/off.
Transmission [k][d][  ][Set ID][  ][Data][Cr]
Data 00:  Screen mute off (Picture on)
Data 01:  Screen mute on (Picture off)
Acknowledgement[d][  ][Set ID][  ][OK/NG][Data][x]
0
05
5.
. 
 V
Vo
ol
lu
um
me
e 
 M
Mu
ut
te
e 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 e
e)
)
To control volume mute on/off.
You can also adjust mute using the MUTE button on
remote control.
Transmission [k][e][  ][Set ID][  ][Data][Cr]
Data 00:  Volume mute on (Volume off)
Data 01:  Volume mute off (Volume on)
Acknowledgement[e][  ][Set ID][  ][OK/NG][Data][x]
0
06
6.
. 
 V
Vo
ol
lu
um
me
e 
 C
Co
on
nt
tr
ro
ol
l 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 f
f)
)
To adjust volume.
You can also adjust volume with the volume buttons on
remote control.
Transmission[k][f][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement [f][  ][Set ID][  ][OK/NG][Data][x]
0
07
7.
. 
 C
Co
on
nt
tr
ra
as
st
t 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 g
g)
)
To adjust screen contrast. 
You can also adjust contrast in the PICTURE menu.
Transmission[k][g][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement [g][  ][Set ID][  ][OK/NG][Data][x]
0
08
8.
. 
 B
Br
ri
ig
gh
ht
tn
ne
es
ss
s 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 h
h)
)
To adjust screen brightness.
You can also adjust brightness in the PICTURE menu.
Transmission[k][h][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement [h][  ][Set ID][  ][OK/NG][Data][x]
0
09
9.
. 
 C
Co
ol
lo
or
r 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 i
i)
)
To adjust screen color.
You can also adjust color in the PICTURE menu.
Transmission[k][i][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement [i][  ][Set ID][  ][OK/NG][Data][x]
1
10
0.
. 
 T
Ti
in
nt
t 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 j
j)
)
To adjust screen tint.
You can also adjust tint in the PICTURE menu.
Transmission[k][j][  ][Set ID][  ][Data][Cr]
Data Red: 00 ~Green: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement [ j ][  ][Set ID][  ][OK/NG][Data][x]
1
11
1.
. 
 S
Sh
ha
ar
rp
pn
ne
es
ss
s 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 k
k)
)
To adjust screen sharpness.
You can also adjust sharpness in the PICTURE menu.
Transmission[k][k][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement[k][  ][Set ID][  ][OK/NG][Data][x]
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							84
APPENDIX
1 12
2.
. 
 O
OS
SD
D 
 S
Se
el
le
ec
ct
t 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 l
l)
)
To select OSD (On Screen Display) on/off.
Transmission[k][l][  ][Set ID][  ][Data][Cr]
Data 00: OSD off Data 01: OSD on
Acknowledgement[l][  ][Set ID][  ][OK/NG][Data][x]
1
13
3.
. 
 R
Re
em
mo
ot
te
e 
 C
Co
on
nt
tr
ro
ol
l 
 L
Lo
oc
ck
k 
 M
Mo
od
de
e 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 m
m)
)
To  lock  the  remote  control  and  the  front  panel  controls
on the set.
Transmission[k][m][  ][Set ID][  ][Data][Cr]
Data 00: Lock off Data 01: Lock on
Acknowledgement[m][  ][Set ID][  ][OK/NG][Data][x]
If  you’re  not  using  the  remote  control  and  front  panel
controls  on  the  TV,  use  this  mode.  When  main  power  is
on/off, remote control lock is released.
1 14
4.
. 
 T
Tr
re
eb
bl
le
e 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 r
r)
)
To adjust treble. 
You can also adjust treble in the AUDIO menu.
Transmission[k][r][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’ as shown.
Acknowledgement[r][  ][Set ID][  ][OK/NG][Data][x]
1
15
5.
.B
Ba
as
ss
s 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 s
s)
)
To adjust bass.
You can also adjust bass in the AUDIO menu.
Transmission[k][s][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’ as shown.
Acknowledgement[s][  ][Set ID][  ][OK/NG][Data][x]
1
16
6.
. 
 B
Ba
al
la
an
nc
ce
e 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 t
t)
)
To adjust balance.
You can also adjust balance in the AUDIO menu.
Transmission[k][t][  ][Set ID][  ][Data][Cr]
Data Min: 00 ~Max: 64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’ as shown.
Acknowledgement[t][  ][Set ID][  ][OK/NG][Data][x]
1
17
7.
. 
 C
Co
ol
lo
or
r 
 T
Te
em
mp
pe
er
ra
at
tu
ur
re
e 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 k
k 
 u
u)
)
To adjust color temperature.
You can also adjust color temperature in the PICTURE menu.
Transmission[k][u][  ][Set ID][  ][Data][Cr]
Data 00: Medium   01: Cool   02: Warm
Acknowledgement[u][  ][Set ID][  ][OK/NG][Data][x]
1
18
8.
. 
 A
Au
ut
to
o 
 C
Co
on
nf
fi
ig
gu
ur
ra
at
ti
io
on
n 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 j
j 
 u
u)
)
To  adjust  picture  position  and  minimize  image  shaking
automatically.  Auto  configuration  only  works  in  RGB-PC
mode.
Transmission[ j ][u][ ][Set ID][ ][Data][Cr]
Data 01: To set
Acknowledgement[u][ ][Set ID][ ][OK/NG][Data][x]
1
19
9.
. 
 C
Ch
ha
an
nn
ne
el
l 
 T
Tu
un
ni
in
ng
g 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 m
m 
 a
a)
)
To tune channel to following physical/major/minor number.
Transmission[m][a][ ][Set ID][ ][Data00][ ][Data01]  
[ ][Data02][ ][Data03][ ][Data04][ ][Data05][Cr]
Digital channels have a Physical, Major, and Minor channel
number. The Physical number is the actual digital channel
number, the Major is the number that the channel should
be  mapped  to,  and  the  Minor  is  the  sub-channel.  Since
the  ATSC  tuner  automatically  maps  the  channel  to  the
Major  number,  the  Physical  number  is  not  required  when
sending a command.
Data 00: Physical Channel Number
NTSC air: 02~45, NTSC cable: 01, 0E~7D
ATSC air: 01~45, ATSC cable: 01~87
Data 01 & 02: Major Channel Number 
Data 01: High byte                    Data 02: Low byte
Two  bytes  are  available  for  the  Major  and  Minor,  nor-
mally only the second byte is used. 
Data 03 & 04: Minor Channel Number 
Not needed for NTSC.*Real data mapping 
0 : Step 0
A : Step 10 (SET ID 10)
F : Step 15 (SET ID 15)
10 : Step 16 (SET ID 16)
63 : Step 99 (SET ID 99)
64 : Step 100
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APPENDIX
Data5:
The table above lists the binary code which must be
converted to Hexadecimal before sending. For example:
The binary code to tune the sub source to an NTSC
cable channel is “1000 0001”, which translates to “81”
in Hex.
* 7th bit : For which source do you want to change the
channel.
* 6th bit: Use a two part or one part channel. Most cases
just use 0 since it’s ignored when using NTSC.
* 5th bit: Use 0 with NTSC since it can only use the phys-
ical channel number. Normally use 1 for ATSC since most
times it doesn’t  matter what the physical number is.
* 4th bit: Set to 0.
* 3-0 bits: Choose signal type.
* Tune Command Examples:
1. Tune to the analog (NTSC) cable channel 35.
Data  00 = Physical of 35 = 23
Data 01 & 02 = No Major = 00 00
Data 03 & 04 = No Minor = 00 00
Data 05 = 0000 0001 in binary = 01
Total = ma 00 23 00 00 00 00 01
2. Tune to the digital (ATSC) local channel 30-3.
Data  00 = Don’t know Physical = 00
Data 01 & 02 = Major is 30 = 00 1E
Data 03 & 04 = Minor is 3 = 00 03
Data 05 = 0010 0010 in binary = 22
Total = ma 00 00 00 1E 00 03 22
Acknowledgement[a][ ][Set ID][ ][OK][Data00][Data01]
[Data02][Data03][Data04][x][a][ ][Set ID]
[ ][NG][Data00][x]
2 20
0.
. 
 C
Ch
ha
an
nn
ne
el
l 
 S
Sk
ki
ip
p/
/A
Ad
dd
d 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 m
m 
 b
b)
)
To add and delete the channels.
Transmission[m][b][  ][Set ID][  ][Data][Cr]
Data 00: Channel Delete Data 01: Channel Add
Acknowledgement[b][  ][Set ID][  ][OK/NG][Data][x]
2
21
1.
. 
 K
Ke
ey
y 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 m
m 
 c
c)
)
To send IR remote key code.
Transmission[m][c][  ][Set ID][  ][Data][Cr]
Acknowledgement[c][  ][Set ID][  ][OK/NG][Data][x]
2
22
2.
. 
 B
Ba
ac
ck
kl
li
ig
gh
ht
t 
 (
(C
Co
om
mm
ma
an
nd
d:
: 
 m
m 
 g
g)
)
To adjust screen backlight.  
Transmission[m][g][  ][Set ID][  ][Data][Cr]
Data Min:00 ~ Max:64 (*transmit by Hexadecimal code)
*Refer to ‘Real data mapping’. See page 84.
Acknowledgement[g][  ][Set ID][  ][OK/NG][Data][x]
Step
NTSC Air
NTSC Cable
ATSC Air
ATSC Cable_std 
ATSC Cable_hrc
ATSC Cable_irc
ATSC cable_auto
Reserved
...
Reserved 1
0
0
1
1
0
0
1
1
x
1 2
0
0
0
0
1
1
1
1
x
1 3
0
0
0
0
0
0
0
0
x
1 4
x
x
x
x
x
x
x
x
x
x
Reserved5
0
1Use
No UseUsing Physical
Channel6
0
1Tw o
OneTwo/One 
Part Channel7
0
1Main
SubMain/Sub 
Picture0
0
1
0
1
0
1
0
1
x
1
Code(Hexa)Remote controlCode(Hexa)Remote control
0F TV/PC
0B INPUT
08 POWER
79 R AT I O
10-19 Number Key 0-9
4C - (Dash)
09 MUTE
02 VO L   +
03 VOL -
00 CH +
01 CH -
1E FAV
39 C C40
41
07
06
44 ENTER
43 MENU
45 Q.MENU
52 SOUND
4D PICTURE
5B RETURN
0A SAP
1A FLASHBK
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