Back to 1992, a custmer with Miolta EP 530 called me, he said that there is a red sign lightng at the keyboard, he describe it to me, it was the toner sign, I told him that the machine is out of toner, he asked me how to ad toner, I told him how to add the toner, two hours later he called me , he said that the machine is leaking a black liquide , when I went to his location I found that he added a bottle pf tunner to the toner hopper.
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