Fujitsu DL7400 Maintenance Manual page 147

5.3.4 Motor Control and Drivers
This printer has six motors (space motor, line feed motor, tractor motor, front and rear tractor selection gear
open/close motor, APTC motor, and skew correction motor) in a standard configuration. It also enables two
optional motors for the front and rear cut sheet feeders (the driving circuits are built in the sheet feeders) to
be mounted.
The printer controller (MB90706) has three stepping motor control boards and controls eight motors using
the motor control LSI.
MPU
MB90706
(LSI1)
MTLSI
MBCG46183-52
5PFV
(LSI3)
Motor drive
enable signal
output circuit
SPM0-3
SPI1,2
MLFM0,1
MLFI1,2
MLFM02,13
TLFM0,1
TLFI1,2
TLFM02,13
HCPPM0-3
APTCM0-3
FCSFMT0-3
RCSFMT0-3
RPM0-3
Figure 5.3.14 Motor controller block diagram
Space motor drive
circuit
Line feed motor
drive circuit
Tractor motor
drive circuit
Front/rear
tractor selection
gear open/close
motor drive
APTC motor
drive circuit
Front sheet
feeder motor
drive circuit
Rear sheet feeder
motor drive circuit
Skew correction
motor drive
circuit
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