Oki LP-1040 Maintenance Manual page 213

(18) Jam code 3791/3792 problem analysis
The tail edge of the paper passes through PS07 (fuser jam sensor) too quickly.
 Check the cut at the tail edge of the paper for:
- Folded end;
- Curved cut line; and
- Jagged edges
If there is a problem with the cut, perform (3) 3042 - 3047 problem analysis and check the
cutter's home position as well as its operation.
Is there a problem below with the installation of PS07?
- Improperly installed PS07
- Lever abnormality
Yes No
If there are any problems, replace the PS07.
 Check for improper operation of PS07 due to external light.
 Check the fuser drive mechanism.
 Check the paper path including shape of the paper guide around the PS07 for any bends
or deformities, so that the paper is advanced smoothly along the proper paper path.
(19) Jam code 3793/3794 problem analysis
The tail edge of the paper passes through PS07 (fuser jam sensor) too slowly.
 Check for any remnants of paper particles in PS07.
 Check the cut at the tail edge of the paper for:
- Folded end;
- Curved cut line; and
- Jagged edges
If there is a problem with the cut, perform (3) 3042 - 3047 problem analysis and check the
cutter's home position as well as its operation.
Select Sensor in Engine Maintenance mode.
Monitor PS07.
Does the display change between On and Off?
Yes No
◆ Check for shorts on CBL-FUSER21, CBL-FUSER22, CBL-FUSER23, and
CBL-PS07.
◆ Check the installation of PS07 and the lever configuration.
If any problems are observed, replace those parts.
There is a hardware problem. Check the paper path.
Chapter 5 Engine Problems Troubleshooting
5-39