Oki LP-1040 Maintenance Manual page 193

(12) 2085 problem analysis
◆ Check for shorts on TH03 (LED head thermistor).
(The thermistor is not functioning properly if its resistance value is 1k ohms or less.)
If there is a problem, replace the LED head.
◆ Check for shorts on CBL-MECH2.
If there are no problems, replace the PCB-ASSY-ARC (RIP board) or the PCB-ASSY-AAC
(actuator control board).
(13) 2086 problem analysis
Check the operational status of each fan.
Check the operation of BL01 (suction fan), BL02 (fuser fan), and BL06 (fuser A3 fan).
Does each fan operates properly?
Yes No
Replace the fans operating improperly.
Check for shorts on TH03 (LED head thermistor).
◆ Check TH03.
If there is a problem, replace the LED head.
◆ Check CBL-MECH2.
◆ Check for any clogging of the ozone filter.
Replace the ozone filter if it is clogged.
(14) 20C1 - 20CA problem analysis
Replace the PCB-ASSY-ARC (RIP board).
(15) 208B problem analysis
◆ Check for shorts on TH05 (backup roller temperature measurement thermistor).
The thermistor's resistance must be more than 1kΩ.
If there is a problem, replace the LED head.
◆ Check for short/open circuit on CBL-FUSER11, CBL-FUSER12, and CBL-FUSER13.
If there are no problems, replace the PCB-ASSY-ARC (RIP board) or the PCB-ASSY-AAC
(actuator control board).
(16) 208C/208D problem analysis
◆ Check for short/open circuit on CBL-MECH1.
If there is a problem, replace the CBL-MECH1.
If there are no problems, replace the environment hygrothermal sensor, PCB-ASSY-ARC (RIP
board), or PCB-ASSY-AAC (actuator control board).
Chapter 5 Engine Problems Troubleshooting
5-19