Test JIG 3310:
Test JIG 3310, 3330, 3350 is a device used to help diagnose problems in mobile phones. Its main purpose is to make the phone function normally outside of its case, so we can test & check all the voltages & test points. Without one, usually repairers have to guess what part is incorrect, as it is difficult to get access to the PCB with the battery connected & also the interface to the PC.

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