Download  Print this page

Advertisement

3.6 Electronics
TIP: See section 3.10
for specific Feeder/
WOW theory (includ-
ing sensors) specific to
DM475.
TIP: The DM475 uses
the existing DM400c
autofeeder hardware,
print engine, modem,
USB and serial ports,
meter PSD, and tape
feeder.
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)

Sensor Summary

PS1. This is a lead edge sen-
sor that detects the presence
of an envelope at the entry
point of the transport. On the
DM300c, the carriage assem-
bly moves into the print posi-
tion and the transport starts
when PS1 sees a lead edge.
PS1 is mounted on the sen-
sor PCB, figure right, below
the disc encoder. The sen-
sor board is connected to the
main logic board through con-
nector J119.
PS2. This sensor is only used
on the 3C00 and ensures that the envelope or tape strip is squarely in the
printing path and that the system has control of the media. It serves as a
fault detector along with PS3. If PS1 is blocked, but PS2 does not see a
lead edge within a predetermined time, the system declares a fault. This
could be a skew condition or a jam.
As the envelope or tape reaches this point, media movement is controlled
totally by the system. This sensor is mounted to the sensor PCB located
below the disc encoder. The sensor board is connected to the main logic
board through connector J119.
NOTE: PS2 is only used on the 3C00. The 4C00, 5C00 and 6C00 do not
have skew detection enabled. Additionally, the 6C00 has a unique sensor
board that does not have a PS2 sensor mounted on it.
PS3. This sensor is used for skew and jam detection along with PS1 and
PS2. If no skew is detected as the envelope or tape strip reaches PS3, the
system initiates a debit process, i.e., triggers the postage meter. If the debit
process is successful, then the jetting of the ink onto the envelope starts
after a fixed interval following initiation of the debit command by PS3. This
sensor is mounted on the sensor PCB which is below the disc encoder. The
sensor board is connected to the main logic board at connector J119.
Transport Open Sensor. This sensor detects the position of the lower
transport jam releasing mechanism. It is an interlock device that pre-
vents machine operation when the lower transport is open. The sensor is
mounted to the sensor board which is located just below the disc encoder
as shown in Figure 3-14. The sensor board is connected to the main logic
board at connector J119.
Ink Cartridge Cover Sensor. This sensor serves as an interlock device
that detects whether the top cover is open or closed. It is connected to the
main logic board through J121. The system will not operate with the top
cover open.
3 • Theory Of Operation
PS1
Transport Open
Lever Sensor
Figure 3-42 Sensor Board (3C00, 4C00, 5C00)
PS3
PS2
3-41

Advertisement

Chapters

This manual also for:

Dm400cDm475Dm450c

Comments to this Manuals

Symbols: 0
Latest comments: