Oki B4100 Maintenance Manual

42640901TH Rev.1 57 /
Oki Data CONFIDENTIAL
4 Fusing unit error Status Message : Thermister Open Error
: Thermister Short Check Error
: Fuser Error Heater temp High
: Fuser Error Heater temp Low
• Turn the power off, then back on again.
• Yes Is the thermistor open or shorted? Measure the resistance between thermistor contacts (heater
contacts 120V/2Ω or 240V/7Ω, and thermistor contacts 200KΩ at room temperature) (see
Figure 5-2).
• Yes Replace the fusing unit.
• No Do the thermistor connector is connected to the main control board connector?
• No Connect the thermistor connector properly.
• Yes Is the heater of the fusing unit turned on (when the heater is turned on, light is emitted)?
• Yes Check the thermistor connector or replace the main control board or the fusing unit.
• No Is the AC voltage being supplied to the connector for the heater of the power supply board?
(see Figure 5-2)
• No Replace the main control board or the power supply board.
• Yes Check the heater connector cord and the heater connector for poor contact .
Heater connector
Thermistor connector
Figure 5-2
5 Fan error (Status Message : FAN Motor Error)
• Is the fan rotating?
• Yes Replace the main control board.
• No Is FAN connector on the main control board being connected properly?
• No Connect FAN connector properly.
• Yes Replace the fan or main control board.

Oki B4100 Specifications

Performance

print speed	19 pages per minute
CPU	200 MHz
time to first page	6.0 seconds
print resolution	1200 x 600 dpi
duty cycle	15, 000 pages per month

Memory

standard RAM	8 MB
maximum RAM	8 MB

Paper Handling

standard paper input	250-sheet Letter/Legal/Universal tray
paper size minimum	3.4" x 5.5"
paper size maximum	8.5" x 14"

Weight and Dimensions

size (WxDxH)	14" x 15.6" x 7.9"
size (WxDxH in cm)	35.5 cm x 39.5 cm x 20 cm
weight	22 lb. (10.0 kg)