Frequent Paper Misfeeds
Depending on the cause of the problem, do one of the following:
Have you ruffled the paper sufficiently?
Double feeding may result if the paper is not ruffled properly.
Remove the paper, ruffle it, and reload it.
For details about ruffling the paper, see "Fanning the Paper", About This Machine.
Coated or another type of unsupported paper is loaded in the machine's tray.
Load paper not supported by the machine's paper tray (Trays 1-2) in the wide LCT or another paper tray supporting the paper.
For details about the size and type of paper that can be loaded in the paper trays, see "Recommended Paper Sizes and Types", About This Machine.
The side fences in the paper tray are too close together.
If the distance between the side fences is less than the paper width, it may interfere with paper transfer and so cause paper misfeeds.
Adjust the side fences to match the paper width.
When you close the paper tray, the side fences may become misaligned due to the weight of the paper. To prevent this, close the paper tray slowly.
For details about loading paper, see "Loading Paper", About This Machine.
The side fences in the paper tray are too far apart.
If the side fences are too far apart, paper misfeeds may occur due to wrong paper size detection.
Adjust the side fences to match the paper width.
For details about loading paper, see "Loading Paper ", About This Machine.
The paper size/orientation/type is not specified correctly.
In tray paper settings, specify the size, orientation, and type of the paper in use.
For details about tray paper settings, see "Changing Tray Paper Settings", Paper Settings.
Too many sheets of paper are loaded in the paper tray.
When loading paper, do not exceed the limit.
For details about how many sheets can be loaded in the paper trays, see "Recommended Paper Sizes and Types", About This Machine.
The edges of the sheets are rough.
Turn the sheets the other way up or smooth the edges before loading.
Sheets are curled or wavy.
Flatten curls and waviness before loading paper.
Turn the sheets the other way up or smooth the edges before loading.
Stacking too many sheets may cause the sheets on top to curl greatly. If this happens, reduce the number of stacked sheets.
Sheets absorbed moisture and became limp.
Sheets that will not be used for a long time should be protected from moisture by, for example, storing them in a sealed bag.
If the machine is plugged in, the heater inside the paper tray starts operating when the main power is off to prevent sheets from absorbing moisture.
The temperature and humidity of the paper tray is checked in the following SP.
SP1-910-001 (Paper Bank Temp/Humidity: Temperature Reading)
SP1-910-002 (Paper Bank Temp/Humidity: Humidity Reading)
When using thick paper or slippery paper.
Enable the Pickup Assist setting.
<If custom paper is used>
In Custom Paper Settings, set 110: [Pickup Assist Setting] to [On].
<If custom paper is not used>
[Adjustment Settings for Skilled Operators] menu, set 0303: [Pickup Assist Setting] to [On].
The paper feed sensor is stained with paper dust.
Clean the part of the paper feed sensor where the paper misfeed is detected.
The paper feed performance is less sufficient because the paper transport roller is soiled with toner.
Clean the part of the paper transport roller where the paper misfeed is detected. Refer to “roller rib map” for the roller position.
The transfer timing motor is not operating correctly (also applies to when paper is fed from LCIT).
A paper jam related to the transfer timing sensor (JAM31, JAM80) occurs frequently.
A paper jam related to the registration timing sensor (JAM28, JAM29, JAM80) occurs frequently.
Check for any loose/disconnected harnesses.
Check that the encoder is correctly attached to the transfer timing roller.
Check for anything which is exerting load on the transfer timing roller.
If none of the above problems exists, there is a malfunction of the transfer timing motor or transfer timing motor driver. Replace the malfunctioning unit.
