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Frontier 370 minilab color upkeep is blue when measure upkeep print are little blue and next upkeep is more more no color

zaw moe

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On your print missing Yellow color. Blue laser channel doesn't work. Can be faulty Blue AOM driver, faulty AOM crystal, or something wrong with laser, or AOM driver control circuit.

Go into laser exposure check menu and look how works Blue laser head. If all good there - change Blue AOM driver. If it will not help - need open laser unit to see  AOM crystal works, or not.

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