Read LG 47LN549E / 47LP620H (CHASSIS:LB3AZ) Service Manual online
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4) Check the model name Instart menu. → Factory name
displayed. (ex 42LD450-ZA)
5) Check the Diagnostics.(DTV country only) → Buyer
model displayed.(ex 42LD450)
6. Check Commercial features
6.1. 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.
6.2. IR Out and DC Power Outlet(5V/12V)
6.2.1. In using Commercial Check Jig
(1) Connect JIG for inspection to RS-232C port on TV as
below.
DC 5V Power must be supplied to JIG through AC Power
Adapter at 3.
(2) Check the LED for IR-Out inspection.
* Please refer to the criteria of Judgement.
6.2.2. In using Mini check Jig
(1) Connect JIG for inspection to RS-232C port on TV as
below.
(2) Enter the Configuration Setup mode in pressing Remote
control keys.
The method to enter Configuration Setup mode
: IN-START → MENU → Configuration Setup → OK
1) Select 5V DC Power Outlet and change the setting : No
→ Yes. After that, check LED color in JIG.
2) After checking 5V DC Power Outlet, change the setting :
Yes → No.
3) Please check 12V DC Power Outlet in the same
procedure.
(3) Check the LED for IR-Out inspection.
* Please refer to the criteria of Judgement.
Vol. control for External SPK
External SPK
Button of Vol. control
Waveform of Oscilloscope
UP(+)
DOWN(-)
Recommended Input Signal
: RF, 1kHz, Sine wave
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