Service manual
12
LC-37HV4U
LC-37HV4D
RS-232C port specifications
Return codeCommand 4-digits Parameter 4-digits
PC Control of the System
• When a program is set, the Display can be controlled from the PC using the RS-232C terminal.
The input signal (PC/AV) can be selected, the volume can be adjusted and various other adjustments and
settings can be made, enabling automatic programmed playing.
•
Attach an RS-232C cable cross-type (commercially available) to the supplied Din/D-Sub RS-232C for the
connections.
NOTE
• This operation system should be used by a person who is accustomed to using computers.
Communication conditions
Set the RS-232C communications settings on the PC to match the display’s communications conditions.
The Display’s communications settings are as follows:
Baud rate:
Parity bit:
Data length:
Stop bit:
Flow control:
9,600 bps
8 bits
None
1 bit
None
Appendix
Command format
Communication procedure
Send the control commands from the PC via the RS-232C connector.
The display operates according to the received command and sends a response message to the PC.
Do not send multiple commands at the same time. Wait until the PC receives the OK response before sending
the next command.
Eight ASCII codes CR
Command 4-digits:Command. The text of four characters.
Parameter 4-digits:Parameter 0 – 9, x, blank, ?
Parameter
Input the parameter values, aligning left, and fill with blank(s) for the remainder. (Be sure that 4 values are input for the
parameter.)
When the input parameter is not within an adjustable range, “ERR” returns. (Refer to “Response code format”.)
No problem to input any numerical value for “x” on the table.
When “?” is input for some commands, the present setting value responds.
C1 C2 C3 C4 P1 P2 P3 P4
0055
100
30
0009
0
????
?
Command table
• About the command except being indicated here, it is outside the guarantee range of operation.
CONTROL ITEM COMMAND
PARAMETER
CONTROL CONTENTS
POWER SETTING It shifts to standby.
It input-switches by the toggle. (It is the same as an input change key)
It input-switches to TV. (A channel remains as it is. (Last memory))
It input-switches to INPUT1~INPUT4.
It input-switches to PC.
An input change is also included.
Although it can choose now, it is toggle operation in inside.
Although it can choose now, it is toggle operation in inside.
(Toggle)
Input terminal number (1–4)
AUTO
AV-Y/C
COMPONENT
AUTO
AV-Y/C
COMPONENT
DVI
(Toggle)
STANDARD
DYNAMIC
MOVIE
GAME
USER
Volume (0–60)
AV mode. (
10)
PC mode. (
90)
AV mode. (
30)
PC mode. (
60)
Only PC mode. (
90)
Only PC mode. (
20)
(Toggle) [AV]
Toggle operation.
An input change is included if it is not TV display.
In Air, 2–69ch is effective.
In Cable, 1–125ch is effective.
If it is not TV display, it will input-switch to TV.
If it is not TV display, it will input-switch to TV.
Change toggle operation of tuner A/B.
Toggle operation of a closed caption.
(Toggle)
Side Bar [AV]
S.Stretch [AV]
Zoom [AV]
Stretch [AV]
Normal [PC]
Stretch [PC]
Dot by Dot [PC]
Zoom [PC]
(Toggle)
Off
SRS
FOCUS
FOCUS
SRS
One screen
Twin screens
The channel number of TV
The channel number of TV
1
The channel number of TV
1
(Toggle)
(Toggle)
OFF
CC1
CC2
T1
T2
(1~125)
AUTO
POWR
ITGD
ITVD
IAVD
IPCD
INP1
INP3
INPUT SELECTION A TOGGLE
INPUT SELECTION B
AV MODE SELECTION
VOLUME
POSITION
VIEWMODE
SRS
TWIN PICTURE
CHANNEL
ANT-A/B
CC
DIRECT
CH UP
CH DOWN
CHANNEL
H-POSITIONH-POSITION
V-POSITION
CLOCK
PHASE
INPUT 1
INPUT 3
AVMD
VOLM
HPOS
VPOS
CLCK
PHSE
SRSS
TWI N
DCCH
CHUP
CHDW
ANTS
CLCP
WIDE
0
x
0
*
x
0
0
1
2
3
1
2
0
*
*
*
*
*
0
0
*
x
x
x
0
1
2
3
4
5
1
1
2
3
4
0
1
2
3
4
5
6
7
8
*
*
1
2
3
4
5
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
*
*
*
*
*
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
*
*
*
*
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
TV
INPUT1-4
PC
NOTE
• If an underbar (_) appears in the parameter column, enter a space.
• If an asterisk (*) appears, enter a value in the range indicated in brackets under CONTROL CONTENTS.
• As long as that from which the parameter (
) in the table is a numerical value, it may write anything.
Return code (0DH)
Response code format
Normal response
Problem response (communication error or incorrect command)
Return code (0DH)
OK
ERR