Return Messages; Special Command Extension - HP LT3200 Service Manual

High-definition lcd tv

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User manual (200 pages)

Illustrated parts & service map (2 pages)

Service manual (101 pages)

Table Of Contents

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Table of Contents

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

STATUS

(Return

current TV

status

value)

Get Status RETURN message format for "GST"(Get Statue) command:

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').

HP High-Definition LCD TV Service Manual

CR : Carriage Return (0Dh)

PARAMETER

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