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HP LT3700 Service Manual: Return Messages; Special Command Extension

Lcd high-definition television.
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Return messages

For every command, TV should return reply. Controller waits before sending another command because some
commands take time before TV is ready to accept next command. For example, the "channel scan" command takes
minutes.
For Normal Response
For Error condition:
Special command extension
CONTROL
Command
ITEM
GET
G
STATUS
(Return
current TV
status
value)
Get Status RETURN message format for "GST"(Get Statue) command:
?
O
Format of WXYZ (always 4 bytes):
For all return values: (add prefix with 0s, right justify).
If volume is 89, return value will be 0089 (add '00').
If channel is 7, return value will be 0007 (add '000').
If Mute is 1, return value will be 0001 (add '000').
O
K
CR
CR : Carriage Return (0Dh)
E
R
R
CR
CR : Carriage Return (0Dh)
PARAMETER
S
T
0
_
_
_
1
_
_
_
2
3
4
5
6
7
8
9
A
B
C
K
W
X
Parameter
Return Data
Power
0: Off (return from MCU), 1: On
Mute
0: Off, 1: On, 2: On Mute
Volume
Current Volume level: 0 ~ 100 (ASCII format)
CH (major)
0 ~ 9999 (e.g.) Ch 99 : 0099, Ch 9 : 0009 in
ASCII)
CH (minor)
0 ~ 9999 (e.g.) Ch 99 : 0099, Ch 9 : 0009 in
ASCII)
Caption
0: Off, 1: On
Input source
0 ~ 8 : (TV Air/Cable, AV1, AV2, YPbPr1,
YPbPr2, VGA, HDMI1, HDMI2, HDMI3)
Aspect
0: Auto, 1: (16:9), 2: (4:3), 3: (Zoom1), 4:
(Zoom2), 5: (Panorama)
Brightness
0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
Contrast
0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
Sharpness
0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
Color
0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
Hue
0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
Y
Z
CR
HP High-Definition LCD TV Service Manual
0
0
0
0
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