MX5500 Missing section of yellow

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  • joegerstner
    • Jul 2025

    #1

    [CQ] MX5500 Missing section of yellow

    I have a Mx5500 that has a section of yellow missing in the middle of the page. when performing sim 64-01 solid yellow, the image is on the drum. When it is transferred to the primary it has the missing section of yellow. the missing section is voided except for feint lines of yellow. I have replaced the drum unit, the primary transfer unit, yellow developer, yellow dv unit, LSU, MC PWB, PCU PWB, TC PWB, HL PWB, removed lsu shutter, complete harness, and color drive unit. After replacing the TC PWB the problem seemed to get better, but still missing some yellow. Here are some examples. PLEASE HELP!!!

    before tc pwb.jpgafter tc pwb.jpg
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