50PH670S-ZD (CHASSIS:PD32A) - LG TV Service Manual (repair manual). Page 10

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4.9.  LNB  voltage  and  22KHz  tone  check 
(only for *PH**0 V, S, U, R)
(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.
5. Set Information 
(Serial No & Model name)
5.1. Check the serial number & Model Name
(1)  Push  the  menu  button  and  press  red  button  on  R/C  to 
enter ‘Customer Support’menu.
(2)  Move to ‘signal test’ menu. And check Serial No & Model 
Name Select the STATION -> Diagnostics -> To set
6. SW Download Guide.
*  Before  put  a  *.epk  to  USB  Stick  make  ‘LG_DTV’  folder  in 
USB. Then, put *.epk file to ‘LG_DTV’ folder and Turn on TV
(1) Put the USB Stick to the USB socket 
(2) Automatically detecting update file in USB Stick
*  If your downloaded program version in USB Stick is Low, 
it didn’t work. 
   But  your  downloaded  version  is  High,  USB  data  is 
automatically detecting.
(3) Show the message “Copying files from memory”
(4) Updating is staring. 
(5) Updating Completed, The TV will restart automatically.
  After  turn  on TV,  Please  press  ‘IN-STOP’  button  on ADJ 
Remote-control.
*  IF  you  don’t  have ADJ  R/C,  enter  ‘Factory  Reset’  in 
OPTION MENU.
(6)  When TV turns on, check the Updated version on Product/
Service Info. MENU.
* After downloading, have to adjust TOOL OPTION again.
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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