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TH670
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How do I use a RS232 cable to control the volume and sound on the projector?
03-10-2020
How do I use a RS232 cable to power on or power off the projector?
03-10-2020
My remote control is not working. What can be done to fix it?
03-29-2019
How to upgrade GS1 software through USB menory stick
01-02-2018
How to make i500 to connect to the internet
01-02-2018
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