Wednesday, February 18, 2015

NOBLEX 42LC816F LCD TV SERVICE MODE POWER SUPPLY CIRCUIT AND DISASSEMBLING

NOBLEX 42LC816

LCD TV

SERVICE MODE  POWER SUPPLY CIRCUIT AND DISASSEMBLING 

TV SERVICE MENU 
Quick operation is needed to enter Service Mode.
TO ENTER TO SERVICE MENU DO THE FOLLOWING
1. Press and hold the MENU button on Side Controls.
2. Keep pressing the MENU button and press the MUTE button on the remote control, and the FACTORY MENU

will be displayed.
To adjust data:
1) Select “DATA” line by pressing  ^ or v button.
2) Press ◄►button to adjust data
SERVICE MODE EXIT
Press MENU button to exit service mode.
Note: The all adjusted data in service mode will be memorized into EEPROM automatically.
INITIAL DATA SETTING
This adjustment is controlled by the CPU (IC8000) through the IIC Bus Data Line in the chassis, and those adjustment data are memorized the memory IC (IC8001). Therefore, Main board or the memory IC (IC8001) is replaced, these data will be disappeared. Readjust should be made. Initial data is provided in the CPU ROM, when the memory IC (IC8001) is replaced with new one. CPU ROM data is loaded into the memory. Initial data is provided to operating the monitor basically. For operating the monitor quality performance, further adjustment is required following chassis electrical adjustment.
1. Receive good quality signal.
2. Enter the Service Mode.
3. Confirm data value to be the same as the Service Adjustment Data Table. If it is different, change to correct data
4. Exit the Service Mode.
ADJUSTING WHITE BALANCE
Pattern
White Pattern 100% (in AV mode).
Condition
Picture Mode: STANDARD
Color Temperature: NORMAL
Aging Time: More than 10 minutes
Adjustment
1. Enter the Service Mode.
2. Select "Source ALL" by pressing ed button, and select "Properties White" by pressing 7 8 button.
3. Set R,G,B value to “FF” by pressing NUMERIC buttons.
To adjust Red : Press 1 (data value up) and 4 (data value down).
To adjust Green : Press 2 (data value up) and 5 (data value down).
To adjust Blue : Press 3 (data value up) and 6 (data value down).
4. Decide one item in three items to a fixed value (For example, let R be fixed value), select item of other 2 colors (Example, G or B), and adjust to produce a normal black and white picture in highlight areas.
(Note: At this time, Adjust the other 2 colors data less than fixed data.)
5. Exit the Service Mode.

After adjustment, confirm white balance again by normal picture.

DISASSEMBLING
1. Remove 6 screws and remove the STAND

LID BACK Removal
1. Remove 5 screws and take the LID BACK off.
Note: LID BACK can be removed even if it does not remove a stand.

ASSY, PWB, POWER Board and ASSY, PWB, MAIN Board Removal
1. Remove Power Board Holder fi rstly, then remove 6 screws and take ASSY, PWB, POWER off.
2. Remove 9 screws on the circuit board and then take ASSY, PWB, MAIN off .

CABINET BACK Removal
1. Remove 21 screws and take CABINET BACK off.

KEY Board Removal
1. Remove 3 screws and take KEY Board off.

SPEAKER Removal
1. Remove 8 screws and take both of SPEAKERS off.

POWER SUPPLY CIRCUIT 
CLICK ON THE IMAGE TO ZOOM IN