LG 42PN450D, Руководство по обслуживанию

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Only for training and service purposes
4.6 LNB voltage and 22KHz tone check
(1) Test method
1) Press "Power on" button of a service R/C.(Baud rate :
115200 bps)
2) Connect cable between satellite ANT and test JIG.
3) Connect RS232-C Signal Cable.
4) Write LNB ON control command through RS-232-C.
5) check LED light ‘ON’ at 18V menu.
6) check LED light ‘ON’ at 22KHz tone menu.
7) Write LNB OFF control command through RS-232-C.
8) check LED light ‘OFF’ at 18V menu.
9) check LED light ‘OFF’ at 22KHz tone menu.
(2) RS-232 command for test LNB
(3) Test result
- After send LNB On command, ‘18V LED’ and ‘22KHz
tone LED’ should be ON.
- After send LNB Off command, ‘18V LED’ and ‘22KHz tone
LED’ should be OFF.
<Remark>
After the measurement conditions witnessed in the last state.
* Caution : Never connect HDMI & D-sub Cable when EDID
downloaded.
■ Edid data and Model option download (RS232 Zender)
- Manual Download
* Caution
● Use the proper signal cable for EDID Download
- Digital EDID : Pin3 exists
* Caution
- Never connect HDMI & D-sub Cable at the same time.
- Use the proper cables below for EDID Writing.
- Download HDMI1, HDMI2 separately because HDMI1 is dif-
ferent from HDMI2.
NO Enter
download MODE
EDID data and
Model option download
Item download ‘Mode In’ download
CMD 1 A A
CMD 2 A E
Data 0 0 00
0 10
When transfer the
‘Mode In’,
Carry the command.
Automatically download
(The use of a internal
Data)
No. Item Condition Hex Data
1 Manufacturer ID GSM 1E6D
2 Version Digital : 1 01
3 Revision Digital : 3 03
For HDMI EDID
DVI-D to HDMI or HDMI to HDMI
Command Set ACK
LNB On [A][I][ ][Set ID][ ][30][Cr] [O][K][x] or NG : [N][G][x]
LNB Off [A][I][ ][Set ID][ ][40][Cr] [O][K][x] or NG : [N][G][x]
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