LG 47LW9800, Service Manual

Page: 19 / 74

- 19 - LGE Internal Use Only Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
• TEST voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
• TEST time: 1 second
• TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
- Internal Pressure TEST = POWER CORD GND & LIVE &
NEUTRAL
• LEAKAGE CURRENT: At 0.5mArms
6. EYE-Q Operation check
Step 1) Turn on the TV.
Step 2) Press EYE button in adjust remote control.
Step 3) Stay 6 seconds with Eye Q sensor hidden located on
the front of the set.
Step 4) Check the “Sensor Data” on the screen and check
whether the value is lower thanafter 6 seconds, the
value does not go below 10, Eye Q sensor is not
working properly. Then, change the sensor.
Step 5) Remove hand from the Eye Q II sensor and stay for 6
seconds.
Step 6) Check whether the “Back Light (xxx)” value has risen
on the screen. If after 6 seconds and the value still
does not go high, the eye Q II sensor is not working
properly. Replace the sensor.
7. Magic Motion Remote Control
Inspection
(47/55LW9500-NA, 60LW9600-NA,
42/47/55LW7700-NA, 447/55LW7700-
UA, 42/47/55LW7500-NB)
- 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
a) Press the ‘START’ key on the controller to pair with the
set.
b) Press the ‘OK’ key in the controller and check whether the
cursor appears on the set.
c) Press ‘Vol+ (STOP)’ key to de-pair with the set.
8. Audio
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
<Step1> <Step2> <Step3>
<Step4> <Step5>
No Item Min Typ Max Unit Remark
9.0 10.0 12.0 W 1. Audio practical max
Output, L/R
(Distortion=10%
max Output)
8.5 8.9 9.8 Vrms
Measurement
condition
EQ Off
AVL Off
Clear Voice
Off
47/55LW9500-NA
47/55LW9600-NA
60LW9600-NA
47/55/60LW9500-UA
42/47/55LW7700-NA
47/55LW7700-UA
42/47/55LW7500-NB
2. Speaker (8
Ω
Impedance)
10.0 15.0 W Measurement
condition
EQ On
AVL On
Clear Voice On
47/55LW9500-NA
47/55Lw9600-NA
60LW9600-NA
47/55/60LW9500-UA
42/47/55LW7700-NA
47/55LW7700-UA
42/47/55LW7500-NB