Service manual

4 • Troubleshooting/Diagnostics
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
4-5
Table 4-4 Mailing Machine Transport Faults
Fault Checkpoints Possible Causes/Solutions
Operator Error. Operator may be feeding piece improperly. Instruct operator to position envelope top edge
against rear wall and slide it to right.
Interlocks. Are all covers and transports closed? An error message should display if a cover is
open.
Fails to feed
when operator
inserts envelope.
PS1. Dirty or defective sensor. Check sensor using
service diagnostics. If PS1, PS2 and PS3 all
fail service diagnostics tests, there may be a
problem with sensor junction board or harness
to J122. PS2 will always show as Clear on the
6C00 even though it does not have a PS2 sen-
sor on the board.
Segmented (separator) roller. Check roller for wear or glazing.
Encoder sensor
, encoder problem. The system
initializes normally, however an envelope feeds
partially, no print, and system locks.
Encoder disc, encoder sensor, wiring to J122
on Main Logic Board, poor connection at J122.
Transport fails to
drive, PS1 okay.
Transport drive motor and drive components.
See picture below.
Test using service diagnostics. Also check har-
ness and connection at J115.
Drive belts damaged or improperly tensioned. Check drive belts and tensioners.
4.2 Troubleshooting Tables
Transport Drive
Belt
Segmented
Roller
Lower Transport
Idlers
Transport
Drive Motor
Transport
Drive Belts and
Tensioners
Pulley
Bearing
Drive Shaft
Pulley
Figure 4-1 Transport Drive