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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5.8. LNB voltage and 22KHz tone check
(only for DVB-S/S2 model)
5.8.1. Test method
(1) Set TV in Adj. mode using POWER ON.
(2) Connect cable between satellite ANT and test JIG.
(3) Press Yellow Key (ETC+SWAP) in Adj Remote control to
make LNB on.
(4) check LED light ‘ON’ at 18V menu.
(5) check LED light ‘ON’ at 22KHz tone menu.
(6) Press Blue Key (ETC+PIP INPUT) in Adj Remote control
to make LNB off.
(7) check LED light ‘OFF’ at 18V menu.
(8) check LED light ‘OFF’ at 22KHz tone menu.
5.8.2. Test result
(1) After press LNB On key, ‘18V LED’ and ‘22KHz tone LED’
should be ON.
(2) After press LNB OFF key, ‘18V LED’ and ‘22KHz tone
LED’ should be OFF.
6. Ship-out mode and GND/Hi-pot
check
6.1. Ship-out mode check (In-stop)
▪ After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode.
6.2. GND and Hi-pot auto-check
6.2.1 Method
(1) GND & Hi-pot auto-check preparation
- Check that Power Cord is fully inserted to the SET.
(If loose, re-insert)
(2) Perform GND & Hi-pot auto-check
- Unit fully inserted Power cord, Antenna cable and A/V
arrive to the auto-check process.
- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
(Remove CORD, A/V form AV JACK BOX)
- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
pallet to move on to next process.
6.2.2 Checkpoint
▪ TEST voltage
(1) DQA Test
- GND : AC 1.5KV/1min, Cut off current not exceed 100mA
- SIGNAL : AC 3.0KV/1min, Cut off current not exceed
100mA
(2) Mass Production Line Test
- GND : AC 1.5KV/1sec, Cut off current not exceed 100mA
▪ TEST time: DQA 1min, Mass Production Line 1 sec
▪ TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
- Hi-pot TEST = POWER CORD GND & LIVE & NEUTRAL
▪ LEAKAGE CURRENT: At 0.5mArms
7. Audio
- Measurement condition:
1) RF input: Mono, 1KHz sine wave signal, 100%
Modulation
2) CVBS, Component: 1KHz sine wave signal 0.5Vrms
8. USB S/W Download
(option, Service only)
(1) Put the USB Stick to the USB socket
(2) Go to General menu then enter to About This TV
(3) Enter the USB EXPERT MODE
(4) Updating is staring.
(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have, TV
can lost all channel data. In this case, you have to channel
recover. if all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
* After downloading, have to adjust TOOL OPTION again.
1) Push "ADJ" key in service Remote control.
2) Select "Tool Option 1" and Push “OK” button.
3) Punch in the number. (Each model has their number.)
No Item Min Typ Max Unit Remark
1. Audio
practi-
cal max
Output,
L/R
(Distor-
tion=10%
max
Output)
9 10 12 W EQ Off
AVL Off
Clear
Voice Off
40/43/49/55
LX761H-ZA
8.10 10.8 Vrms
4.5 5 6 W EQ Off
AVL Off
Clear
Voice Off
32LX761H-ZA
5.5 6 Vrms
2. Speaker
(6Ω
Imped-
ance)
9 10 12 W EQ Off
AVL Off
Clear
Voice Off
40/43/49/55
LX761H-ZA
4.5 5 6 W EQ Off
AVL Off
Clear
Voice Off
32LX761H-ZA
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