EBC ELECTRONICS
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How to Remove 42fd9954 Power Supply Board

Warning

SERIOUS INJURY OR DEATH COULD RESULT FROM THE IMPROPER REPAIR OR SERVICE OF THE TV. ALL WORKS MUST ONLY BE DONE BY AN QUALIFIED TECHNICIAN.

The work procedures are important for ensuring the safety of the product and the servicing work. Be sure to follow these instructions.

Before starting the work, secure a sufficient working space.

At all times other than when checking the product, be sure to turn OFF the main POWER switch and disconnect the power cable from the power source of the display during servicing.

To prevent electric shock and breakage of PC board, start the servicing work at least 1 minute after the main power has been turned off. Especially when installing and removing the power supply PC board or the SUS PC board in which high voltages are applied, start servicing at least 20 minutes after the main power has been turned off.

While the main power is on, do not touch any parts or circuits. If any connection other than the one specified is made between the measuring equipment and the high voltage power supply block, it can result in electric shock or activation of the leakage-detection circuit breaker.

When the surface of the panel comes into contact with the cushioning materials, be sure to confirm that there is no foreign matter on top of the cushioning materials before the surface of the panel comes into contact with the cushioning materials. Failure to observe this precaution may result in, the surface of the panel being scratched by foreign matter.

When handling the circuit PC board, be sure to remove static electricity from your body before handling the circuit PC board.

Be sure to handle the circuit PC board by holding the large parts as the heat sink or transformer. Failure to observe this precaution may result in the occurrence of an abnormality in the soldered areas.

Do not stack the circuit PC boards. Failure to observe this precaution may result in problems resulting from scratches on the parts, the deformation of parts, and short-circuits due to residual electric charge.

Perform a safety check when servicing is completed. Verify that the peripherals of the serviced points have not undergone any deterioration during servicing. Also verify that the screws, parts and cables removed for servicing purposes have all been returned to their proper locations in accordance with the original setup

Instruction

1. Unplug main power cord. Put the monitor (face down) on a soft surface (blanket, foam cushion or foam stand), to make sure that you do not damage the front glass plate.

2. Removing back plate: Remove all circled fixation screws from the back plate, as indicated in figure.

3. The power supply board is located in the middle of the tv.

Disconnect green circled connectors. Connectors have a lock- push a tub then pull out the connector.

4. Disconnect red circled connectors.

5. Remove the screws (yellow circled) and take off the board.

Packing

Obviously PC boards are relatively fragile, and poor packing can result in a board that is damaged beyond repair.

To properly pack the board, wrap it board in three layers of the large bubble wrap and place into a box. Use bubble wrap with large 1" bubbles, not the 1/4" bubbles as it doesn't protect the board well. If you wish, put the board in one of those computer or electronics anti-static bags, but it is not really necessary.

When the board is packed in 3 layers of the big bubble wrap stuff, it is well protected from shocks and bumps. Put the packaged board into a snug fitting box, or use more bubble wrap to fill the box so the boards do not bang around in transit. You have to understand that some courier companies use a conveyor belt system that drops all boxes about three feet.