Oki C930 - Page 219

Oki Data CONFIDENTIAL
44043511TH Rev.2
218 /
Poor Fusion (lightly touching the toner causes the toner to wipe off or fall off)
• Is standard paper used?
NO Use standard paper.
• YES Fuser Unit contact properly connected?
NO Properly connect the fuser unit contact.
• YES Is the fuser unit roller dirty?
YES Replace the fuser unit.
• NO Is the [Paper Thickness] (Menu 1) properly set?
NO Properly set the [Paper Thickness].
• YES Is there an AC voltage output between CN connector Pin 1 and 3 of the low
voltage power unit?
NO Replace the low voltage power unit.
• YES Are the three Upper Roller Thermistors down or short-circuited? (See Figure 7-1.)
At an ambient temperature between 0 and 43˚C: 7-pole side:
Pins 1 & 2 = 4194 to 696.6k
Ω
Pins 3 & 4 =
642.1 to 122.4k
Ω
Pins 5 & 6 = 642.1 to 122.4k
Ω
NO Replace the fuser unit.
• YES Is the thermistor on the lower side down or short-circuited? (See Figure 7-1.)
At an ambient temperature between 0 and 43˚C: 6-pole side:
Pins 1 & 2 = 642.1 to 122.4k
Ω
NO Replace the fuser unit.
• YES Does the fuser temperature match the set temperature?
Check the fuser temperature on the LCD of the engine Maintenance Mode display.
NO Replace the fuser unit.
• YES Replace the fuser unit.
Note! 1. When replacing the Engine PCB (S2V(1200dpi) or S2X(600dpi) PCB ), remove the
EEPROM from the old PCB, then mount that EEPROM on the new PCB.
2. If the EEPROM is not going to be replaced, refer to Section 5.2.2.