Safety Precaution - LG PSF1032A Service Manual

1. Safety precaution

Caution: PLS product operates at high temperature and generates high voltage at the power
supply. Because it can cause serious injury such as electric shock or burn when
handling the product, please read follow the check order as shown below.
1. Installation and repair/check precaution
• Never disassemble the product unless done by specialized service technician.
(It can cause safety accidents such as electric shock or fire.)
• When servicing the product, unplug the power cord and make sure that the power is completely disconnected.
• When repairing or checking the PLS product immediately after operating the product, wait until the system is
cooled sufficiently.
• If PLS is abnormally turned off, always handle the product after disconnecting the power.
(It can cause electric shock or leakage of electromagnetic wave.)
• If the product is wet, always wipe out the moisture before working on the product.
• Clean the front cover glass periodically to maintain the illumination.
• Do not directly look into the bulb while the product is operating. The strong light can cause visual defect to the
eye.
2. Check grounding
• Before working on the product, check whether the product is grounded and make sure to ground the product if not
done so.
3. Electricity connection test for troubleshooting
• Install the repair jib on flat floor and mount the PLS product, and then connect the power.
• Do not leave any flammable material around the product and keep a safe distance as defective parts can heat up
to start a fire.
• Because the heat can be concentrated on the illuminated area, keep more than 30cm of distance from flammable
material or from the floor.
4. Check and replacement method for electric parts
• When checking the electric part immediately after disconnecting the power, discharge the high voltage part of the
PCB before doing so. (High voltage capacitor and lightron high voltage charge can cause electric shock.)
• When the electricity is connected, never touch the power circuit.
(High voltage of DC 3500V~4000V is generated on the high voltage part.)
• Do not use parts that do not comply with the specification. (It can cause an error.)
• When there is an issue with the power circuit, it is difficult to replace the individual parts installed on the PCB.
Therefore replace the entire power supply.
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Caution: When using devices such as tester to check for error, always disconnect the electricity before using.
5. Electricity/Operation test after repair
• Never operate the product when it is not fully assembled such as lightron disassembled and waveguide separated
etc. It can cause strong leakage of electromagnetic wave.
• Connect the electricity in normal condition after sufficiently checking the electric/mechanical assembly of parts,
wiring condition and grounding connection etc.
6. Correct installation and grounding check
• After repairing the PLS product, clean the exterior and interior of the main unit and check the grounding condition.
And then install the product in its original position.
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