Oki LP-1040 Maintenance Manual page 192

(11) 2084/2089/208A problem analysis
Check to ensure that the two halogen heaters light up.
◇ When checking to see if the halogen heater lights up, make sure that the fuser
Note
Are the halogen heaters lit up?
Yes
◆ Check the installation conditions for TH01, TH04 (fuser control thermistor), and TH02
(overheat thermistor). (Look for loose connectors, paper particles, raised or bent spots,
etc.)
◆ Check for dirt on the contact surface of TH01, TH02, and TH04's rollers (heat).
Clean any dirt off if necessary.
◆ Check for any open circuits on TH01, TH02, and TH04.
If there is a problem, replace the TH01, TH02, or TH04.
◆ Check for shorts on CBL-FUSER21, CBL-FUSER22, CBL-FUSER23, and CBL-FUSER13.
If there are no problems, replace the PCB-ASSY-ARC (RIP board) or the PCB-ASSY-AAC
(actuator control board).
5-18
unit temperature has decreased sufficiently.
◇ After checking that the heaters light up, quickly turn off the halogen heater by
either turning off the power or opening the cover.
No
Check the operations of MS06-2(24V) and MS18 in the INT5(MS06) for:
- Proper installation; and
- Continuity
Check that the temperature fuse, THM for continuity.
Yes No
Replace the temperature fuse ASSY.
* After you have replaced the part, perform the 2084, 2089 and 208A
problem analysis once again.
◆ Check the continuity of the heaters FL01 and FL02.
Was continuity detected?
Yes No
Replace the halogen heater that is not conducting.
◆ Check CBL-FUSER11, CBL-FUSER12, and Cable (Halogen) for open circuits.
◆ Check CBL-ARCCNT for a short or open circuit.
If the problem persists, replace the low voltage power supply unit or the
PCB-ASSY-ARC (RIP board).
Warning