Oki LP-1040 Maintenance Manual page 190

(6) 2032 problem analysis
The output has shorted at the high-voltage output signal line, CH3.
Turn on CH3. Check for any electrical discharge noise and check to ensure that the high
voltage power supply's monitor output is stable to determine if CH has shorted out.
See High Voltage Power Supply Voltage/Current Calibration.
CH3 Problem (TC Check)
◆ Check the transfer unit. (Check for any foreign particles on the transfer roller.
Also, check the installation of the transfer unit.)
◆ Check CBL-HV3 and CBL-HV31 for a short.
If any problems are observed, replace those parts.
(7) 2035/2036/2037 problem analysis
These errors occur when the configuration (writing of correction data) of the LED head was not
performed properly.
Is the voltage on the LED head's CN2-1 and CN2-2 +5VDC?
Yes
Check CBL-LEDH1.
If there are no problems, replace the LED head or the PCB-ASSY-ARC (RIP board).
(8) 2081 problem analysis
◆ Check the installation condition of TH01 (fuser control thermistor).
(Look for loose connectors, paper particles, raised or bent spots, etc.)
◆ Check for dirt on the contact surface of TH01's roller (heat). Clean any dirt off if necessary.
◆ Check for any open circuits on TH01.
If there is a problem, replace the TH01.
◆ Check for shorts on TH02 (overheat thermistor). (The thermistor is not functioning properly
if its resistance value is 1k ohms or less.)
◆ Check for shorts on CBL-FUSER21, CBL-FUSER22, and CBL-FUSER23.
If any problems are observed, replace those parts.
If there are no problems, replace the PCB-ASSY-ARC (RIP board) or the PCB-ASSY-AAC
(actuator control board).
5-16
No
◆ Check for a disconnect or a short of the CBL-LEDHDC.
◆ Check the low voltage power supply.
If there are no problems, replace the LED head.