Star Micronics LS-5 SERIES Technical Manual page 131

P-11. After-image
Print sample
Step
1 (Faulty HVPS CR (DC))
Is the output of the HVPS CR (DC) normal?
2 (Faulty BTR assy)
Is there any foreign matter or grime on the BTR of the BTR
assy?
3 (Faulty EPX toner cartridge)
Does the problem stop occurring when the EPX toner cartridge
is replaced with a new one?
(If the problem is with the drum surface, the after-images will
occur at intervals of approximately 94 mm.)
4 (Faulty heat roll)
Are there any scratches, foreign matter, grime, or other irregu-
larities on the heat roll?
(Check this if the after-images are occurring at intervals of
approximately 62 mm.)
5 (Faulty pressure roll)
Are there any scratches, foreign matter, grime, or other irregu-
larities on the pressure roll?
(Check this if the after-images are occurring at intervals of
approximately 61 mm.)
After-image on the print
(This refers to printing in which the toner is not completely cleaned off of the
drum, and the image is reproduced again on the next print.)
Check parts with different specifications for problems with usage, defective
installation, breakage, deformation, and adhesion of grime or foreign matter.
• Main parts to be checked:
(1) EPX toner cartridge, (2) BTR assy, (3) Fuser assy, (4) Heat roll
(5) Pressure roll, (6) Earth plate assy, (7) HVPS, (8) MCU PCB
Check
– 127 –
TROUBLESHOOTING
Symptom
Initial check
Measure (if abnormal)
To section 3-18
Replace BTR assy.
Replace EPX toner cartridge.
Replace heat roll.
Replace pressure roll.