mattjo Posted July 24, 2021 Report Share Posted July 24, 2021 I am getting mark on the prints. It does not happening to all the prints. When I print about 20 prints then I get couple prints with the marking. I also block off the laser and no marking. please advise. Quote Link to comment Share on other sites More sharing options...
Dave S Posted July 24, 2021 Report Share Posted July 24, 2021 The reason it doesn’t show when you cover the laser is because there is nothing to develop as the prints will be white with no exposure. The laser can’t cause such a mark. Most likely it is something in the wet section causing it. Probably it will be happening in or around the CD or BF racks. Check the condition of crossover rollers before the BF rack (No.3 crossover on a 3411) Check the exit rollers of the No.1 rack and the entrance rollers of the No.2 rack (the paper crosses between the racks inside the tank on the 3411) Quote Link to comment Share on other sites More sharing options...
mattjo Posted July 24, 2021 Author Report Share Posted July 24, 2021 Thank you for your reply! Quote Link to comment Share on other sites More sharing options...
davidlam Posted July 24, 2021 Report Share Posted July 24, 2021 1) Agreed. check crossover roller, bushing spring conditions... I suspect the "squeege" action is not good in CD and BF. 2) What had you done before this problem come out ? e.g. any roller(s) replaced ??? Quote Link to comment Share on other sites More sharing options...
mattjo Posted July 24, 2021 Author Report Share Posted July 24, 2021 Nothing really. I didn’t notice until the customer pointed out all his print have marks on them. Someone here local tech suggested there might be an grounding issue where the sparking might cause the issue. I will check further on Monday and check the condition of the rollers. Thank you! Quote Link to comment Share on other sites More sharing options...
davidlam Posted July 25, 2021 Report Share Posted July 25, 2021 Definitely not statics nor grounding issue. How long have you been using this qss-3411 ? Are all problem marks identical shape and positions on prints ? Quote Link to comment Share on other sites More sharing options...
davidlam Posted July 25, 2021 Report Share Posted July 25, 2021 show more problem prints for us to see Quote Link to comment Share on other sites More sharing options...
mattjo Posted July 25, 2021 Author Report Share Posted July 25, 2021 here is the additional images. its the marking top of the prints. thank you. Quote Link to comment Share on other sites More sharing options...
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