| Problem
|
Solutions
|
| ADF failure to feed
|
- replace feed rollers as a set
|
| ADF double feeding
|
- Check ADF reverse roller
- replace rollers as a set
- some use friction pad instead of reverse roller. This also should be replaced.
- Some larger printers will have an ultrasonic double feeding sensor. check/configure this.
|
| ADF Jams - other than pickup related
|
- Check for obstructions in the paper path
- Check motors are operating - use printer output checks or cheat the door sensors and observe
- Check sensors are operating - use input checks or attempt to determine which sensor failed from error/jam codes or position of paper at the moment the jam occurs
|
| ADF does not rise when paper placed in tray
|
- Check ADF lift motor - ouput checks
- Check lift mechanism not gummed up with staples and paper clips
- Check paper set sensor - input checks - these often get dusty
|
| when copying document from ADF - black lines on front side only
|
- Check for any foreign contamination on slit glass
- Clean all mirrors on optical assembly
- Clean/replace white strip
|
| When copying document from ADF - black lines on back side only
|
- Single pass ADFs will have a second scanner above check for contamination
|
| Scanner squeaks loudly when moving
|
- apply grease - preferably camera grease (no outgassing)
|
| Scanner does not detect paper size properly
(or does not recognize paper on flat bed at all)
|
- check paper size sensors - there are typically 3
- check CCD & white plate
- clean white background
- clean scanner glass - both sides
|
| Paper tray - 3 roller type - failure to feed
|
- replace rollers as a set
- check motors with output checks
- check feed mechanism
- clean sensors
- check sensors with input checks
- check tray lift mechanism
- check paper properly loaded
|
| Paper tray - 3 roller type - double feeding
|
- replace rollers as a set
- check feed mechanism
- check paper in tray not sticking together or statically charged. Especially old paper. "leaf" through the paper to dissipate some static
|
| Paper tray - 1 roller type - failure to feed
|
- replace roller
- check motor with output checks
- clean sensors
- check sensors with input checks
- check tray lift mechanism
- check paper properly loaded
|
| Paper tray - 1 roller type - double feeding
|
- replace roller and friction pad
- check paper in tray not sticking together or statically charged. Especially old paper. "leaf" through the paper to dissipate some static
|
| Paper tray - vacuum feed type - failure to feed
|
- check belts not worn
- check airflow - clean filters
- adjust airflow - up or down
- ensure correct paper weight selected
- enable "feed assist" if available
|
| Paper tray - vacuum feed type - double feeding
|
- check airflow - clean filters
- adjust airflow - up or down
- ensure correct paper weight selected
|
| paper tray - registration off across feed
|
- check tray bottom gear may have jumped a tooth or two
- check paper properly loaded - side fences tight
- in service mode may be able to adjust registration for each tray
|
| registration off with feed (lead edge)
|
- resolve any mechanical issues first
- in service mode may be able to adjust registration for each tray
|
| skew
|
- resolve any mechanical issues first
- check paper properly loaded - side fences tight
- in service mode may be able to adjust "buckle" to adjust for skew
- may be a physical adjustment for skew
|
| solid thin line - prints and copies
|
- check for white buildups on charge roller or charge corona wire - replace, don't bother cleaning, it'll be back
- check for scratch around drum - replace drum
|
| solid thin line - prints and copies - dirty brown color
|
- check image transfer belt cleaning mechanism - replace
|
| large brown line - prints and copies - may be intermittent
|
- check image transfer belt cleaning mechanism - likely clogged
- follow clog to source - augers may be jammed
|
| voids - no toner in thin line
|
- chunks in development unit blocking developer flow - can attempt cleaning - insert thin mylar and clean back side of developer blade - or replace developer or development unit
- scratch on drum
|
| identical voids or spots every several pages
|
- scratch or foreign matter on image transfer belt
|
| large missing area (void) on pages - all colors
|
- image transfer belt badly torn - will fail completely soon
|
| black funny plastic paper chunks found all over machine
|
- image transfer belt torn
- fuser belt torn
|
| light background on printed pages
|
- potential sensor failed
- problem with drum
|
| light dusting of toner all over inside of machine
|
- developer worn out - replace - typically it will last a year or two depending on usage
|
| marks on back side of pages - copies and prints
|
- Primary transfer roller issues - rebuild/replace
|
| brown marks on back side of pages
|
- primary transfer roller issues - rebuild/replace
|
| fuser not warming up
|
- thermistor or thermostat issue - check continuity on thermostats
- fuser bulb broken
- fuser bulb no continuity
- some machines will lock you out after a fuser has overheated until you enter/leave service mode & reboot
- other machines lock you out until a code is entered in service mode
- other machines require a new microfuse to be installed in fuser (new unit detection)
- Careful here, don't start any fires
- don't cheat thermostats ever - replace them
- if machine has inductive heating for fuser that unit may be in need of replacement
|
| fuser warm, but not not fusing toner to paper at all
|
- check pressure mechanism of fuser
- check ALL fuser bulbs are working - sometimes there is a bulb in pressure roller
- clean thermistors
- significantly wrong paper weight set
|
| toner not completely fused to paper
|
- check ALL fuser bulbs are working - sometimes there is a bulb in pressure roller
- check paper weight set in machine
- increase temperature of fuser
- clean thermistors and non-contact sensors for fuser
- check fuser pressure mechanism
- increase pressure
|
| ghost images printed after dark areas
|
- increase pressure / temperature of fuser
|
