42LH250C (CHASSIS:LD01X) - LG TV Service Manual (repair manual). Page 15

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6. CI+ Key Download method
(1) Download Procedure
1) Press "Power on" button of a service remote control.
(Baud rate : 115200 bps)
2) Connect RS232-C Signal Cable.
3) Write CI+ Key through RS-232-C.
4) Check whether the key was downloaded or not at ‘In
Start’ menu. (Refer to below).
=> Check the Download to CI+ Key value in LGset. 
1. check the method of CI+ Key value
a. check the method on Instart menu
b. check the method of RS232C Command 
1) into the main ass’y mode (RS232 : aa 00 00)
2) check the key download for transmitted command
(RS232 : ci 00 10)
3) result value
- normally status for download : OKx
- abnormally status for download : NGx
2. Check the method of CI+ Key value (RS232)
1) into the main ass’y mode (RS232 : aa 00 00)
2) Check the method of CI+ key by command (RS232 :
ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
- 15 -
CMD 1
CMD 2
Data 0
A
A
0
CMD 1
CMD 2
Data 0
C
I
1
CMD 1
CMD 2
Data 0
A
A
0
CMD 1
CMD 2
Data 0
C
I
2
CI+ key Value
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