Service manual

4 • Troubleshooting/Diagnostics
4-4 DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
Table 4-3 Automatic Feeder Faults (DM400c/DM450c/DM475)
Fault Checkpoints Possible Causes/Solutions
Fails to feed. Is material load properly? Check that operator is loading material cor-
rectly.
Does material fall within published specifica-
tions?
Check material specifications.
Is hopper overloaded? Stack should not exceed 2.5 pounds or 3 inch-
es in height.
Is side guide set too tight? Check for 1/16 inch clearance between side
guide and stack.
Problem with stack sensor FS1. Check sensor.
Jam or debris in upstream transport. Check for jammed material and/or debris in en-
tire paper path.
Poor separation. Upper feeder transport not completely closed. Check transport.
Operator error
, Incorrect loading technique. Materials out of
specification. Hopper overloaded.
Transport obstructed. Check for paper fragments and other debris on
the transport.
Problems with retard roller assembly, feed belt
assembly.
Check for proper operation. Check belts and
tires for contamination, glazing, etc.
Inconsistent gap
between pieces.
Sensor and/or timing issues. Check sensors using service diagnostics. Also
check encoders.
Machine fails
to recognize
automatic feeder
.
Wrong power supply Installed. Verify that the correct power supply is installed.
The DM300c, DM400c/DM450c, and DM475 all
use a different power supply.
Loose connection between Base and Feeder. Check the communication cables between the
meter and the automatic feeder.
4.2 Troubleshooting Tables