Toshiba e-Studio 350P

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	Action
Toner electrodes (not a FRU)	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 PCN3 and on the contact tips below the print cartridge assembly. • If continuity fails, call the next level of service.
LVPS/HVPS board Controller card Miscellaneous cables	With the printer off, disconnect the LVPS/HVPS cable from J19 on the controller card. Turn the printer on, and verify +24 V dc on pins 8 and 9 of the cable. Verify ground on pins 7, 12, and 14. • If the voltage is incorrect, replace LVPS/HVPS board. • If grounds are incorrect, check ground paths. • Check confinuity in the cable. Replace the cable if necessary. • If voltage is correct and the toner electrodes are good, replace the controller card. • See the “LVPS/HVPS service check” and the “Controller card service check”, if necessary.

Heavy background

Poor development or poorly charged toner particles cause excessive background. This is more noticeable as the toner cartridge nears end-of-life.

FRU	Action
Toner cartridge (not a FRU) PC Kit (not a FRU)	Check the toner darkness setting in the driver. Try a lower setting. Make sure the toner cartridge and PC Kit are correctly installed and the high voltage contacts are clean. If the toner cartridge and PC Kit are installed correctly, try a new PC Kit first and then toner cartridge.
LVPS/HVPS Controller card	Check the contacts for correct installation and contamination where contact is made between the print cartridge assembly and spring contacts which connect to the LVPS/HVPS board at PCN3. Clean as necessary. If this does not correct the problem, replace the following FRUs one at a time in the order shown: • LVPS/HVPS board (See “Black page” for pin values.) • Controller card

Partial blank image/white spots (no repeating pattern)

FRU	Action
Toner cartridge (not a FRU)	Remove the toner cartridge assembly and gently shake the assembly to evenly distribute the toner. Check to make sure that the laser light path is not blocked. If toner cartridge is low, try a new one.
Paper (not a FRU)	Make sure recommended media is being used. Check the media settings in the printer driver. A heavier media may require higher heat to properly fuse.