Read LG 42LV375H-ZA (CHASSIS:LD03X) Service Manual online
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4. Check Commercial Features
4.1. External SPK Out and Volume control
4.1.1. Equipment & Condition
- Jig(Speaker out JIG, Speaker out control Jig) or Oscilloscope
- Power only mode
- Power only mode
4.1.2. Check the speaker out & control
1) Connect the External Speaker : Check the sound.
2) Press the “+” key on the control Jig : Check the Max output.
3) Press the “-” key on the control Jig : Check the Min output.
2) Press the “+” key on the control Jig : Check the Max output.
3) Press the “-” key on the control Jig : Check the Min output.
Connect oscilloscope, you can see this waveform.
4.2. IR Out and DC Power Outlet(5 V / 12 V)
4.2.1. Equipment & Condition
- Jig (commercial check JIG)
- Special 232C Cable for commercial check Jig
- Power only mode
- Special 232C Cable for commercial check Jig
- Power only mode
4.2.2. Check the power out & IR out - commercial
check jig
1) Connect each other RS232C port on the Commercial Check
JIG.
2) Press RED Color key on Service remote control.
3) Check the LED of jig board.
3) Check the LED of jig board.
- +12V / +5V LED (OK condition: Turn On)
- IR LED (OK condition: blinking)
- IR LED (OK condition: blinking)
4.2.3. Check the power out & IR out - mini jig
1) Connect mini jig on RS232c port.
2) Press RED Color key on Service remote control.
3) Check the LED of mini jig.
2) Press RED Color key on Service remote control.
3) Check the LED of mini jig.
4.3. Pro:Idiom
1) Connect the RF Cable.
2) Turn to the Pro:Idiom channel (No. 333).
3) Check the video & sound.
** Only displayed at “POWER ONLY” mode
2) Turn to the Pro:Idiom channel (No. 333).
3) Check the video & sound.
** Only displayed at “POWER ONLY” mode
4.4. Front LED Clock
1) Check the LED Clock in Power only mode.
Button of Vol. control
Waveform of Oscilloscope
UP(+)
DOWN(-)
Recommended Input Signal
: RF, 1 KHz, Sine wave
: RF, 1 KHz, Sine wave
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