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Safety instruction
safety precautions
1.1 General Policy
– Do no T attempt to make a circuit modification for the sake of safety for long
– unplug the power cord from the power outlet before removing the projector .
– Please use the random supply line correctly, and make sure that the line must be erathed.
– u se insulation transformer on the ac power cord before maintenance.
– Do no T touch any rotating parts of the projector (cooling fan, etc.) when the lid is removed and the power is
powered on.
– Please pay attention to the original layout of the wire in the maintenance process. o nce there is a short circuit,
please replace all the pin the maintenance processarts that are overheated and damaged due to short circuit.
– make sure to install the protective devices, such as: insulation barrier, insulation paper, screen and insulation R-C
connection, etc. after the maintenance is completed.
– Please check for the leakage after the maintenance is completed to prevent customers from electric shock.
1.2 Leakage check:
1.Be ready to measure circuit in figure 1 belo .
make sure your voltmeter are of the same properties as described in table 1.
2. Connect the circuit as figure 2 shows. Plug the power cord into an electrical outlet
3. Connect M1 to T1 as figure 2 shows, and measure the voltage
4. Connect m1 to T2, and measure the voltage again.
5.The read value of the voltmeter in step 4 must be 0.375 volts or less in step 3 and 4. This means that the current
must be 0.75 mA or less.
6.if the read values exceed the above criteria, the projector must be repaired and re-examination in order to
prevent the risk of electric shock before returning to the customer.
1.3 uV and uh P lamps prevetive measures:
– Be sure to unplug the power cord from the power outlet when replacing the lamp.
– The lamp will reach to rather high temperature during the lighting process. You need spend some time to cool
lamp off completely before replacing it will emit a small amount of u V radiation.
– There will be high pressure in the lamp internal component. s o it may lead to an explosion just for your abnormal
operation
– Do no T touch the lamp wires during maintenance as there is much high pressure in the lamp internal component.
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