LG 60LN549E Service Manual page 17

● 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!!
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Only for training and service purposes
7.4. Check Commercial features concerning
Output.(IR Out/SPK Out/External Clock)
Model Info
Name IR Out
LN549E-ZA O
7.4.1. 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
Button of Vol. control Button of Vol. control Waveform of Oscilloscope Waveform of Oscilloscope
UP(+) UP(+)
DOWN(-) DOWN(-)
7.4.2. 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)
- 17 -
Commercial Feature
External Speaker out External Clock
O
#1
LGE Internal Use Only
X