LG 42LB550A, Service Manual

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9.3. Checkpoint
(1) Test voltage
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
(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 0.5 mArms
10. USB S/W Download
(optional, Service only)
* Warning : Do not Download on Power only mode
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
- If your downloaded program version in USB Stick is lower
than that of TV set, it didn’t work.
Otherwise USB data is automatically detected.
(3) Show the message “Copying files from memory”.
11. Optional adjustments
11.1. Manual ADC Calibration
■ Enter ‘EZ ADJUST’ mode by pressing ‘ADJ’ key.
■ Enter Internal ADC calibration mode by pressing ‘OK’ key at
‘3. ADC CALIBRATION’
* Caution: Using ‘P-ONLY’ button of the Factory SVC remote
control when turns TV on.
● If you can’t success ADJUST ADC, please confirm ‘Support
Int. ADC’ at TOOL OPTION2.
11.2. Manual White balance Adjustment
11.2.1. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface.
(80°~ 100°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.