HP LT3200 - Manual (Page 36)

HP High-Definition LCD TV Service Manual 31
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
O K CR
CR : Carriage Return (0Dh)
For Error condition:
E R R CR
CR : Carriage Return (0Dh)
Special command extension
CONTROL
ITEM
Command PARAMETER Parameter Return Data
0 _ _ _ Power 0: Off (return from MCU), 1: On
1 _ _ _ Mute 0: Off, 1: On, 2: On Mute
2 Volume Current Volume level: 0 ~ 100 (ASCII format)
3 CH (major) 0 ~ 9999 (e.g.) Ch 99 : 0099, Ch 9 : 0009 in
ASCII)
4 CH (minor) 0 ~ 9999 (e.g.) Ch 99 : 0099, Ch 9 : 0009 in
ASCII)
5 Caption 0: Off, 1: On
6 Input source 0 ~ 8 : (TV Air/Cable, AV1, AV2, YPbPr1,
YPbPr2, VGA, HDMI1, HDMI2, HDMI3)
7 Aspect 0: Auto, 1: (16:9), 2: (4:3), 3: (Zoom1), 4:
(Zoom2), 5: (Panorama)
8 Brightness 0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
9 Contrast 0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
A Sharpness 0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
B Color 0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
GET
STATUS
(Return
current TV
status
value) G S T
C Hue 0 ~ 100 (e.g. 7 -> 0007, 77 -> 0077) in ASCII
Get Status RETURN message format for “GST”(Get Statue) command:
? O K W X Y Z CR 0 0 0 0
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’).