LG 42PN4500 Service Manual page 10

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
Command
LNB On [A][I][ ][Set ID][ ][30][Cr]
LNB Off [A][I][ ][Set ID][ ][40][Cr]
(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.
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Set ACK
[O][K][x] or NG : [N][G][x]
[O][K][x] or NG : [N][G][x]
- 10 -
■ Edid data and Model option download (RS232 Zender)
NO Enter
download MODE
Item download 'Mode In'
CMD 1 A
CMD 2 A
Data 0 0
0
When transfer the
'Mode In',
Carry the command.
- 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.
For HDMI EDID
DVI-D to HDMI or HDMI to HDMI
No. Item
1 Manufacturer ID
2 Version
3 Revision
EDID data and
Model option download
download
A
E
00
10
Automatically download
(The use of a internal
Data)
Condition Hex Data
GSM 1E6D
Digital : 1 01
Digital : 3 03
LGE Internal Use Only