32LN549E, 32LP63 H (CHASSIS:LD3AF) - LG TV Service Manual (repair manual). Page 17

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● CASE 2. No Clock LED Model
If the auto volume of TV 2 is on and TV 1, 2 had a same TV 
channels → USB cloning is success!!
8.4.  Check Commercial features concerning 
Output.(IR Out/SPK Out/External Clock)
8.4.1. External SPK Out and Volume control
(1)  Connect external speaker to speaker out port with phone 
jack on TV side as below.
(2)  Check the Max. speaker output is 1W or not. Sine wave 
with 1KHz will be displayed.
(3)  Press Vol. control button up/down in turns and check the 
waveform of Oscilloscope
8.4.2. IR Out
< Equipment & Condition >
▪ Simple Jig (commercial check JIG) 
▪ Power only mode
(1)  Connect each other RS232C port on the Commercial 
Check JIG.
(2) Press any key on SVC Remote-control.
(3) Check the LED status of the Check JIG.
    - IR LED(OK condition: blinking) (LED #1)
Button of Vol. control   
Waveform of Oscilloscope   
UP(+) 
 
DOWN(-) 
Button of Vol. control   
Waveform of Oscilloscope   
UP(+) 
 
DOWN(-) 
 
#1 
Model Info
Commercial Feature
Name
IR Out External Speaker out External Clock
LP63xH-ZA
O
O
O
LN549E-ZA
O
O
X
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