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HP LASERJET ENTERPRISE M855 - 2 Solve problems

HP LASERJET ENTERPRISE M855
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Booklet maker feed-and-delivery operation
Basic operation
Stacker unit basic operation
The stacker unit processes simple stacking, job offset, and stapling. The stacker controller PCA
controls all operations involved in these modes, according to the commands from the product. Jobs
from the product can also be routed for booklet making.
Figure 1-119 Stacker unit basics
Swing guide drive system
Alignment drive system
Stapler drive system
Delivery drive system
Feeder drive system
Shutter drive system
Output bin
drive system
Booklet making control system
(saddle stitcher controller PCB)
Control system
Output bin
drive system
Stacker unit electrical security
A 16-bit microprocessor (CPU) is installed on the stacker controller PCA to control the stacker
operation sequence and CAN signal communication with the video controller PCA. The stacker
controller PCA drives solenoids, motors, and so forth in response to the commands received from the
video controller through the CAN singnal communication line. In addition, the stacker controller PCA
reports information about various sensors and switches to the video controller through the CAN signal
communication line. Major functions of the IC chips installed on the stacker controller PCA are as
follows:
IC13 (CPU): Controls the operation sequence
IC10 (EEP-ROM): Backs up adjustment values
IC6 (Communication IC): Communicates with the host machine
IC12 (communication IC): Communicates with the saddle stitcher unit
ENWW Booklet maker and booklet maker with hole punch 165

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