LG 55G2 Service Manual page 16

5. GND and Internal Pressure check
5.1. Method
(1) GND & Internal Pressure auto-check preparation
- Check that Power Cord is fully inserted to the SET.
(If loose, re-insert)
(2) Perform GND & Internal Pressure 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.
5.2. Checkpoint
(1) Test voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
6. EYE-Q Operation check
Step 1) Turn on the TV..
Step 2) Press 'EYE button' on the adjustment remote-
controller.
Step 3) Cover 'Eye Q sensor' on the front of set with your
hands, hold it for 6 seconds.
Step 4) Check "the Sensor Data" on the screen, make certain
that Data is below 10. If Data isn't below 10 in 6
seconds, Eye Q sensor would be bad. You should
change Eye Q sensor.
Step 5) Uncover your hands from Eye Q sensor, hold it for 6
seconds.
Step 6) Check "Back Light(xxx)" on the screen, check data
increase . You should change Eye Q sensor.
<Step 2>
<Step 4>
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
<Step 3>
<Step 6>
<Step 5>
7. QWERTY Remote Control Inspection
- Required Instruments: Inspection RF-remote control,
Inspection IR-KEY-CODE remote control.
- Prior to the test, AA battery for the RF-remote control should
be adequate. Change the battery for each LOT is
recommended)
- Test procedures
(1) Press the 'START' key on the controller to pair with the
set.
(2) Press the 'OK' key in the controller and check whether
the cursor appears on the set.
(3) Press 'Vol+ (STOP)' key to de-pair with the set.
8. Audio
No Item Min
1 Audio 9.0
practical
max Output,
L/R
8.5
2 Speaker
(8Ω Imped-
ance)
Measurement condition:
(1) RF input: Mono, 1 KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1 KHz sine wave signal 0.4Vrms
(3) RGB PC: 1 KHz sine wave signal 0.7Vrms
- 16 -
Typ Max Unit Remark
10.0 12.0 W Measurement
condition
(TBD)
8.9 9.8 Vrms
10.0 15.0 W Measurement
condition
(TBD)
LGE Internal Use Only