Lexmark T430 Service Manual - Page 74

4048-1xx High voltage power supply (HVPS) service check FRU HVPS Cartridge Action Check continuity between the HVPS and the charge roll, Dr. B (doctor blade), TAR (toner adder roll), the developer roll, and the photoconductor (DC). Check as follows: 1. Turn printer off. 2. Remove the right side cover. See "Right side cover removal" on page 4-12 for more information. 3. Remove the print cartridge. 4. Check from C on the HVPS to the bearing on the left side of the charge roll. See page 5-8 for more information. 5. Check from the Dr. B, TAR, developer roll (D), transfer roll (T), and photoconductor (DC) respectively to the corresponding pin on the right side frame where the print cartridge makes its contacts. If any show discontinuity, remove the HVPS and check the cartridge contact assemblies (springs) for continuity and damage. If the charge roll and the cable at C show discontinuity, replace the left guide assembly. See "High voltage power supply (HVPS)" on page 5-8 for testing the board. Fuser service check When toner is partially fused to the paper, it is usually caused by low fuser temperature. The line voltage to the printer must be within the following limits: • 90 V ac-120 V ac for nominal-100 V model printer • 100 V ac-127 V ac for the nominal-110 V model printer • 200 V ac-240 V ac for the nominal-220 V model printer 2-40 Service Manual