Lexmark E238 Service Manual - Page 132

4511-xxx Black page Note: Incorrect laser exposure or incorrect charging of the photoconductor causes an all black page. Always verify the same results from a different print cartridge assembly and developer before proceeding. FRU Toner electrodes (not a FRU) LVPS/HVPS board Controller card Action Check the three rearward electrodes below the print cartridge assembly for contamination or damage. Correct as necessary. Check continuity between the cable (DEV, TAR, and doctor blade) connection CN203 and on the contact tips below the print cartridge assembly. • If continuity fails, call the next level of service. With the printer off, disconnect the LVPS/HVPS cable from J4 on the controller card. Turn the printer on, and verify +24 V dc on pin 8 of the cable. Verify ground on pin 7. • If the voltage is incorrect, replace LVPS/ HVPS board. • If voltage is correct and the toner electrodes are good, replace the controller card. • See the "LVPS/HVPS service check" on page 2-90 and the "Controller card service check" on page 2-82, if necessary. 2-100 Service Manual